# How to Verify an Airport Overlay and Avigation Easement Before Buying a Vacant Lot

Source: https://brictale.com/build/land/verify-vacant-land-airport-overlay-avigation-easement-before-buying
Published: 2026-09-14
Audience: Homeowner
Published by Brictale, a consumer home-intelligence publication. https://brictale.com

## Short answer

Before buying, map the proposed house—not just the parcel—against the airport’s runway protection zone, height surfaces, noise information, and recorded easements. Order title records, get survey elevations and a house envelope, ask the airport sponsor for current records, and obtain a written determination from the local zoning or building jurisdiction. FAA review does not replace local approval, and a map alone cannot prove a lot is buildable or quiet.

---

# How to Verify an Airport Overlay and Avigation Easement Before Buying a Vacant Lot

Before buying, map the proposed house—not just the parcel—against the airport’s runway protection zone, height surfaces, noise information, and recorded easements. Order title records, get survey elevations and a house envelope, ask the airport sponsor for current records, and obtain a written determination from the local zoning or building jurisdiction. FAA review does not replace local approval, and a map alone cannot prove a lot is buildable or quiet.

## 1. Treat the lot as unverified until the proposed house passes four separate reviews

An airport-adjacent vacant lot is worth pursuing only when the actual house concept can pass four separate reviews: title and easement review, ground-safety and runway-protection review, airspace and obstruction review, and local land-use and building review. Noise is a fifth decision constraint because it may affect whether a residence is allowed, what disclosures or acoustical measures are required, and whether the home fits your life. A listing map, a seller’s statement, or a nearby existing home is evidence that a parcel exists; none is evidence that your proposed home is permitted, comfortable, or free of aviation restrictions.

The first jurisdictional distinction matters. Federal rules govern navigable-airspace notice and FAA aeronautical studies. The state may operate an aviation office or airport-zoning program. The airport sponsor maintains airport-specific operating and noise information and may own or enforce an easement. The county, city, township, municipality, or other local planning and building authority with land-use jurisdiction decides the local permit and zoning question. The actual deed, recorded easement, adopted zoning map, overlay ordinance, and written agency response control the parcel. The [FAA land-use compatibility guide](https://www.faa.gov/sites/faa.gov/files/land_use_airports.pdf) expressly says the federal government cannot dictate local land-use policies and identifies state and local governments as responsible for land-use planning, zoning, and regulation. It also says that guide is a planning resource, not FAA regulation or official agency policy.

That division prevents a common but expensive inference: “FAA has no objection” does not mean “the county must issue a building permit,” and “the county’s zoning map allows a dwelling” does not mean the FAA, airport sponsor, or deed allows the proposed roof, tower, tree, lighting, or future addition. A local approval can still be conditioned on an easement, disclosure, sound-control measure, height review, or airport consultation. A recorded private instrument can restrict the land even when the current zoning district appears residential. A runway protection zone can make the house location or the intended density unacceptable even if the remainder of the legal parcel is large enough on paper.

Use this review within Brictale’s wider [homeowner blog](/blog) and carry the verified constraints from land diligence into design, team selection, and construction so a roof, crane, tree, or addition is not changed without a recheck. Brictale’s [editorial method](/editorial-method) explains how source scope and illustrative calculations are reviewed.

### The decision you are actually making

The question is not simply, “Is this parcel near an airport?” Use a more precise decision statement:

> Can this household place and permit the intended home, accessory structures, trees, utilities, and future additions on this parcel, under the current recorded instruments, airport constraints, noise conditions, and local rules, within the time and uncertainty allowed by the contract?

That wording includes the house, not just the land. It also includes future changes. A one-story home with a low roof may fit where a two-story home does not. A detached garage, solar array, chimney, antenna, tall tree, construction crane, or temporary concrete pump can create a separate review issue. A lot can be physically outside a mapped overlay but still carry a deed restriction. A house can fit below an airspace surface but be rejected by a local use restriction or required to accept a noise easement. The correct answer is parcel-and-design-specific.

### Who is responsible for which answer?

Use this responsibility map before sending questions. It keeps one office from being asked to certify something it does not control.

| Question | Primary record or responder | What the responder can usually confirm | What it cannot replace |
| --- | --- | --- | --- |
| What rights or restrictions burden the land? | Title company, real-estate attorney, and the official recorder/registrar for the parcel’s jurisdiction | Recorded easements, covenants, notices, releases, exhibits, and legal descriptions in the title chain | A survey, zoning approval, or FAA study |
| Does the parcel touch an RPZ, approach area, airport property, or airport project boundary? | Airport sponsor, state aviation office where applicable, and the local planning authority | Current airport maps, land inventory, sponsor records, and the correct contact for a parcel inquiry | A title search or final local permit |
| Does the proposed object trigger FAA notice or require an aeronautical study? | FAA Obstruction Evaluation/Airport Airspace Analysis system, often coordinated by the project sponsor or applicant | A federal airspace determination for the submitted proposal | Local zoning, building, environmental, or title approval |
| Is residential use allowed and what conditions attach? | The county, city, township, or municipality with zoning jurisdiction | Overlay status, allowed use, conditional-use or special-use path, height review, disclosure, sound, and permit requirements | FAA’s federal review or an airport employee’s informal opinion |
| Can the house be designed to manage noise? | Architect plus acoustical, mechanical, and building-envelope professionals as needed | A site-specific design response, ventilation strategy, and documentation | A noise map, a phone app reading, or a general promise of quiet |

Ask each participant to state the jurisdiction, record date, map or document version, parcel identifier, and whether the response is informal guidance or a formal determination. Save the response as part of the purchase file. If an answer is verbal, send a follow-up email that restates the question and asks the official to correct it. The goal is not to collect reassuring comments; it is to create a chain of evidence that another professional can audit.

### Four outcomes, not one yes/no

Classify the parcel only after the checks below:

- **Proceed:** the proposed house envelope is outside or compliant with each applicable restriction, the title review is acceptable, the local authority confirms the development path in writing, and the noise conditions are acceptable to the household.
- **Proceed with redesign:** the first concept fails or is conditioned, but the architect can move, lower, shrink, or otherwise revise the house and the responsible authorities confirm that revised envelope.
- **Proceed only with a contract condition:** an unresolved written determination, title instrument, easement form, or design approval is still required. The purchase agreement or option must preserve the time and remedy needed to obtain it; have the local real-estate attorney write the condition.
- **Walk away:** the buildable area, required use, noise environment, access, or title restriction is incompatible with the household’s non-negotiables, or the responsible authority will not provide a clear path before the contingency ends.

Do not call a lot “buildable with conditions” when the condition is actually an unanswered question. A condition is manageable only when its owner, trigger, cost or design consequence, deadline, and acceptance test are known.

![Annotated vacant-lot plan layering the parcel, proposed house envelope, runway protection zone, height surface, and local overlay](https://brictale.com/images/home/build/land/verify-vacant-land-airport-overlay-avigation-easement-before-buying/parcel-to-house-review-layers.webp)

## 2. Build a parcel-to-house evidence file before the inspection or option period ends

Start the verification as soon as the parcel is identified and before spending money on a full house design. Put a written feasibility condition in the offer or option agreement that gives the buyer time to obtain title, survey, airport, zoning, and professional reviews. The exact wording and enforceability are matters for the real-estate attorney and the law of the state where the property is located. Do not rely on a generic inspection period if it ends before government offices, the title company, and the airport sponsor can respond.

### Record the parcel identity precisely

Create a one-page cover sheet with:

1. Street address, if assigned, and county, city, township, or municipality.
2. State and the local land-use jurisdiction. A mailing address is not enough when a parcel lies in an unincorporated area, a township, a special district, or a boundary area.
3. Parcel identification number, legal description, tax map reference, and approximate acreage.
4. Seller’s title commitment date, title company, commitment number, and exceptions schedule.
5. Survey date, surveyor, coordinate reference if supplied, vertical datum, benchmark or source, and whether the survey is boundary-only, topographic, ALTA/NSPS, or another scope.
6. Nearest airport name, identifier, airport sponsor, airport type, runway ends, and the date of every map reviewed.
7. Contract dates: offer acceptance, inspection deadline, title-objection deadline, option expiration, financing deadline, and closing.
8. Your intended house program: number of stories, approximate footprint, finished-floor elevation range, roof type and maximum roof elevation, chimney or mechanical projections, garage, accessory structures, solar equipment, trees, driveway, septic or utility features, and any future addition.

The airport identifier matters because names can be similar and an airport’s official map may use a three-letter code. The sponsor may be a city, county, regional authority, port authority, state agency, private owner, or another entity. Ask the local planning office to identify the exact sponsor and every authority that reviews airport-related development. Do not assume the airport operator and the zoning authority are the same organization.

### Collect the source set in a deliberate order

Use this sequence so that a late discovery does not invalidate earlier work:

**First, obtain the title package.** Request the current title commitment, all listed exception documents, the recorded deed, easement instruments, declarations, covenants, restrictions, access agreements, airport notices, and referenced exhibits. Ask the title company to identify any aviation, avigation, overflight, height, noise, obstruction, airport, runway, approach, clear-zone, conservation, development-rights, or use restriction by name and recording number. If an exception is described only by a book/page, instrument number, or exhibit reference, obtain that entire record rather than relying on the commitment’s short description.

**Second, obtain the local land-use record.** Download or request the official zoning map, airport overlay map, overlay text, comprehensive-plan map if the overlay uses it, application checklist, fee schedule, and pre-application process for the parcel’s actual jurisdiction. Ask whether an airport review is advisory, mandatory, a zoning certificate condition, a special-use or conditional-use trigger, a building-permit referral, a state permit trigger, or part of a separate airport-zoning board process. Ask for the rule’s effective date and the authoritative version.

**Third, obtain airport and state aviation records.** Ask the airport sponsor for the current airport layout plan or the public portion of the airport map, runway end elevations, runway orientation, RPZ geometry or boundary, approach and departure information that it is allowed to share, current noise program or contour materials, known easements, and the contact who reviews off-airport development. In states with a state aeronautics office or airport-zoning system, ask that office what state review applies. In Michigan, for example, the Department of Transportation identifies state-specific airspace and zoning resources including the Michigan Tall Structures Act, Michigan Aeronautics Code, Michigan Zoning Enabling Act, Airport Zoning Act, and federal Part 77 in its [airspace and zoning resources](https://www.michigan.gov/mdot/travel/mobility/aeronautics/airspace-zoning). That page is a Michigan example, not a national checklist; another state may assign the work differently.

**Fourth, order the site information needed to test the house.** A boundary survey may not contain enough elevation detail for airspace review. Ask a licensed surveyor for the spot elevations and contours needed to locate the house, the highest proposed object, the runway reference, and any line or plane calculation. Confirm the vertical datum in writing. If the house is near a slope, embankment, floodplain, ditch, or airport boundary, a few random elevations are not an adequate substitute for a useful topographic survey.

**Fifth, prepare a conceptual envelope.** The architect or designer should place a rectangle or simple massing envelope on the survey, not a marketing sketch. Show north arrow, property lines, runway centerline or runway-end reference if supplied by the authority, proposed finished floor, roof ridge, parapets, chimneys, antennas, cranes or temporary high equipment where relevant, trees to remain or be planted, and accessory structures. Put the assumptions directly on the drawing.

### Send a bounded request, not “Can I build here?”

An unbounded question invites a general answer. Use a short cover email with the parcel number, legal description, survey, concept plan, elevations, target dates, and the specific decisions you need. Ask each authority to answer only what it controls:

> Please confirm whether parcel [identifier] is within or affected by your current airport overlay, RPZ, approach/height surface, noise zone, or airport land-interest record. For the attached illustrative house envelope, please identify the applicable review, permit, referral, notice, easement, disclosure, sound-control, or prohibited-use condition; the governing document and effective date; the responsible next applicant; and what additional survey or design information you require. Please distinguish informal staff guidance from a formal determination.

Attach a table with a blank status column. A useful response may be “the parcel is outside our mapped RPZ, but the local county controls zoning,” or “FAA notice is not determined until coordinates and elevations are submitted.” That is progress because it identifies the next owner. A response that says “looks fine” is not.

### Protect the purchase decision

The buyer, not the listing agent, owns the decision to waive the contingency. The title company can identify recorded documents but usually does not decide whether a proposed house satisfies them. The surveyor can establish boundaries and elevations but does not issue a zoning approval. The architect can test a concept but cannot grant an easement. The airport sponsor can explain airport records but does not necessarily issue the building permit. The local authority can state its application path but may not opine on title interpretation or acoustical performance. Make the handoffs explicit before paying for work.

If the seller refuses access for the survey, refuses to provide known airport documents, or insists that a neighboring home proves your plan is acceptable, record that as a diligence risk. A delayed or incomplete answer is not neutral when the contract clock continues to run. Ask the attorney whether to extend the contingency, add a right to terminate, require seller cooperation, or use an option rather than closing outright.

## 3. Read the title and RPZ records together, because a map cannot reveal the full restriction

Read the recorded title instruments before treating an airport map as a buildability answer. An aviation easement can be a private property interest that binds later owners, describes a restricted airspace or use, and grants rights to the airport or another beneficiary. An RPZ is a ground-safety planning area and can affect land use even when a title search does not use the phrase “avigation easement.” Review the recorded language, its exhibit, the survey location, and the current airport or local map as one combined record.

The [FAA airport-land-use advisory circular](https://www.faa.gov/documentLibrary/media/Advisory_Circular/150_5190_4b_Land_Use_Compatibility.pdf) explains that an avigation easement may limit new construction that penetrates a described surface or land use detrimental to aircraft operations. It also says overflight or avigation easements run with the title of the encumbered land and bind succeeding owners to the height and land-use controls described in the easement. Those are general planning descriptions. The actual recorded instrument controls the parcel, and state property law determines how it is interpreted and enforced.

### What to extract from an easement

Do not summarize an easement as “airport noise restriction.” Extract its operative terms into a plain-language schedule and preserve the original document. Look for:

- the grantor, grantee, airport sponsor, state agency, and successors;
- the recording jurisdiction, instrument number, book/page, date, and legal description;
- whether the easement is permanent, temporary, assignable, released, amended, subordinated, or limited to a project;
- a map, Exhibit A, Exhibit X, metes-and-bounds description, coordinates, or runway reference;
- rights to overflight, noise, vibration, fumes, dust, glare, electromagnetic effects, or aircraft operations;
- height restrictions, approach or transitional surfaces, tree or vegetation controls, marking or lighting rights, and inspection or removal rights;
- land-use restrictions, population or occupancy limits, residential prohibitions, disclosure duties, sound-insulation duties, or construction-consent requirements;
- rights to enter the property, trim or remove trees, remove obstructions, inspect, maintain, or enforce;
- required future releases, approvals, subordination agreements, or notices before a permit or sale;
- any conflict clause, severability clause, compensation language, or reference to an airport layout plan or aviation regulation.

An easement can restrict a future addition that was not part of the original purchase. It can also affect trees and accessory structures, not just the primary roof. An easement that allows the airport to remove penetrating vegetation is different from a document that limits residential occupancy, even though both may be loosely called an airport easement. Ask the attorney to explain the practical effect in the proposed house location, not only whether the instrument is “standard.”

### Exhibit X and similar drawings are part of the answer

Some programs attach a graphic exhibit that shows the area burdened by the instrument. Michigan MDOT states that Exhibit X is a required drawing or sketch in its avigation-easement documents and graphically depicts the encumbered area and obstructions to the approach surface. The [Michigan MDOT easement and RPZ page](https://www.michigan.gov/mdot/travel/mobility/aeronautics/land/avigation-easement-and-runway-protection-zone) also links sample forms for vacant properties inside and outside RPZs. Those forms are useful for understanding the kind of information an airport program may track, but they are Michigan examples. They do not become the form for a parcel in Texas, Virginia, Idaho, or another state.

If the title commitment references an exhibit that is missing, stop the diligence clock mentally even if the legal clock has not stopped. Request the exhibit from the recorder, title company, seller, airport sponsor, or state agency. Compare the exhibit’s scale, north arrow, runway reference, and parcel lines with the current survey. A scan can be rotated, clipped, or reproduced without a useful scale. Ask the surveyor to overlay it on the current boundary and topographic survey. Record whether the overlay is a visual screening or a survey-grade alignment.

### Understand the RPZ as a ground-use constraint

The [Michigan MDOT description of runway protection zones](https://www.michigan.gov/mdot/travel/mobility/aeronautics/land/avigation-easement-and-runway-protection-zone) calls an RPZ a two-dimensional trapezoidal area at ground level before a runway threshold or beyond a runway end, intended to enhance the safety and protection of people and property on the ground. It says airports receiving federal money are required to control RPZs from incompatible land uses and that fee acquisition must be considered before an avigation easement in an RPZ. That is Michigan program guidance and references federal airport design policy; it is not a rule that every state or airport uses identically.

For your parcel, record at least these questions:

| RPZ question | Evidence to obtain | Decision implication |
| --- | --- | --- |
| Is any part of the legal parcel inside the RPZ? | Current airport or state map overlaid on the boundary survey | The parcel may have a smaller usable area than its gross acreage suggests. |
| Is the proposed house, driveway, septic field, pool, shed, parking, or gathering area inside it? | Concept plan with every intended improvement | A “house outside” answer may still leave a restricted accessory use or concentration of people. |
| Is the airport seeking fee acquisition, an easement, or another control? | Sponsor land-acquisition record, airport layout plan, and written sponsor response | A proposed acquisition or easement may change the transaction, title, value, or use. |
| Does the RPZ geometry follow a current runway end or a planned runway condition? | Current runway data and the map’s effective date | A stale map can give false comfort or false alarm. |
| What does the local jurisdiction do with the RPZ? | Local overlay text, zoning map, application checklist, and written staff response | The permit path may be a prohibition, special review, condition, or referral. |

Do not convert an RPZ into a simple circular setback. Its shape and dimensions relate to the runway, runway end, approach type, airport design standards, and program facts. The airport sponsor or state aviation office should identify the authoritative geometry. A GIS screenshot can help locate the issue but should not be the only boundary evidence when a house location is close to the line.

### Common title failures

**The commitment lists “airport easement” but nobody reads the exhibit.** The fix is to obtain the full instrument and ask the surveyor and attorney to mark the proposed house, trees, and improvements against it.

**The seller says the easement was “paid off.”** A payment, release, relocation, or purchase of development rights matters only if the recorded record shows the legal effect. Request the release or amendment and verify that it covers the exact parcel and restriction.

**The title company says the exception is standard.** Standard for a local airport program does not mean harmless for your design. A standard form may still prohibit your preferred house location, require sound insulation, or grant future tree-removal rights.

**The parcel is outside the graphic but inside the legal description.** Use the recorded metes and bounds or an attorney-and-surveyor review. Do not make a legal conclusion from a low-resolution exhibit.

**A neighboring lot has a different easement.** Easements can vary by parcel, acquisition phase, runway end, improvement status, or project. Compare the exact instrument, not the neighbor’s experience.

The title decision is complete only when each recorded aviation instrument has an identified restriction, a mapped location, an effect on the proposed house, an owner for follow-up, and a written acceptability decision from the buyer’s attorney.

![Side-by-side comparison of a recorded avigation easement exhibit and current survey overlay with missing and aligned records marked](https://brictale.com/images/home/build/land/verify-vacant-land-airport-overlay-avigation-easement-before-buying/easement-rpz-record-overlay.webp)

## 4. Convert the house concept into elevations that an airport and local authority can actually verify

Have a licensed surveyor establish the relevant ground elevations and have the architect define the highest points of the proposed home before asking for a definitive height review. Airport constraints are three-dimensional: the same footprint can have different consequences on a slope, and a lower house can still be affected by a restrictive easement or local overlay. “Two stories” and “about 30 feet” are not enough for an authority to evaluate a proposal.

### Specify the vertical datum and every high point

Your evidence file should distinguish:

- **Ground elevation:** the elevation at the proposed object location, in the survey’s stated vertical datum.
- **Finished-floor elevation:** the planned elevation of the lowest occupied or finished floor, including any crawlspace or basement assumptions.
- **Roof elevations:** ridge, parapet, eave, cupola, dormer, solar rack, chimney, flue, vent, antenna, lightning protection, and other appurtenances.
- **Object height above ground:** the vertical difference between the highest point and the local ground at that point.
- **Airport reference elevation:** the runway or airport elevation used by the authority and its datum or source.
- **Horizontal geometry:** perpendicular distance from the relevant runway centerline, runway end, airport reference point, or mapped boundary, measured in the manner requested by the authority.
- **Coordinate system:** latitude/longitude or state-plane coordinates if required; record the horizontal datum and precision supplied by the surveyor.

A roof ridge is not necessarily the highest object. A chimney or temporary construction crane may be higher. An existing tree can be an obstruction issue even when the house is not. A future addition should be shown as a separate envelope if the household already expects it. If the design is not yet fixed, submit a maximum envelope with a conservative high point and label the proposal as conceptual.

### Use a screening formula only as a conversation starter

An illustrative plane check can show why elevations and distances are needed, but it does not determine whether the house is allowed. For a simplified approach-surface screen:

```text
candidate surface elevation
= reference runway-end elevation
  + (horizontal distance ÷ slope denominator)

object elevation
= local ground elevation + object height above local ground

screening clearance
= candidate surface elevation - object elevation
```

The applicable surface, slope, starting point, runway classification, approach procedure, local rule, and easement language must come from the responsible authority. Current [14 CFR Part 77](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77) establishes federal obstruction standards and airport imaginary surfaces, but it does not give a homeowner permission to self-approve a structure.

### Illustrative worked example: show the inputs, units, and sensitivity

The following is a modeled example, not a survey, FAA calculation, local rule, or prediction for a real airport. It demonstrates the worksheet method.

Assume a surveyor reports the proposed ridge location at 742.6 feet NAVD88. The architect’s preliminary envelope has a 26.0-foot vertical height from local ground to ridge, a 3.0-foot chimney projection, and a 9.0-foot antenna above the ridge. The airport authority supplies, for discussion only, a runway-end reference of 755.1 feet NAVD88 and asks the team to screen a 50:1 approach surface at a horizontal distance of 2,000 feet from that reference.

The initial calculations are:

```text
ridge object elevation = 742.6 ft + 26.0 ft = 768.6 ft NAVD88
chimney object elevation = 742.6 ft + 29.0 ft = 771.6 ft NAVD88
antenna object elevation = 742.6 ft + 35.0 ft = 777.6 ft NAVD88

screening surface elevation = 755.1 ft + (2,000 ft ÷ 50)
                             = 755.1 ft + 40.0 ft
                             = 795.1 ft NAVD88
```

On this simplified screen, the antenna has 17.5 feet of apparent clearance below the illustrative surface. That result is not a “safe to build” conclusion. It says only that the stated inputs did not exceed the stated hypothetical plane. The actual FAA study could use different geometry or evaluate other effects; the local authority could use a different surface; the easement could impose a lower height; and the noise or RPZ review could still prevent or condition the use.

Now test sensitivity instead of hiding uncertainty. Model a 4.0-foot upward change as an actual parcel-elevation input update: an updated survey reports 746.6 feet NAVD88 at the antenna location while the separately supplied runway reference remains 755.1 feet NAVD88. The antenna elevation becomes 746.6 + 35.0 = 781.6 feet NAVD88, and apparent clearance falls to 795.1 - 781.6 = 13.5 feet. This is not a datum or benchmark correction applied only to the parcel. If a common datum or benchmark adjustment affects elevations expressed in the same datum, apply it consistently to the parcel, object, and runway reference; a +4.0-foot shift to both reference and object elevations leaves the 17.5-foot clearance unchanged. If the concept adds a 12.0-foot temporary crane above the ridge, its illustrative object elevation is 780.6 feet and its screening clearance is 14.5 feet. If a future addition raises the roof by 8.0 feet, the ridge becomes 776.6 feet, leaving 18.5 feet in this particular screen but possibly changing the easement, local permit, or cumulative review. If the authority later identifies a 40:1 surface, the surface elevation at 2,000 feet becomes 805.1 feet; if it identifies a 100:1 surface from another reference, it becomes 775.1 feet, leaving the antenna above that simplified value. The point is not to guess which ratio applies. The point is to show why the authority must identify the applicable surface before the buyer treats a desktop calculation as proof.

Record each result with the source of the reference elevation, the exact distance, the slope, the high point, and the person who accepted the input. Never mix NAVD88, local assumed datum, airport elevation, and “feet above ground” as if they were interchangeable. A formula can be arithmetically correct and still be legally or technically irrelevant because its datum or geometry is wrong.

![Profile diagram comparing runway reference, surveyed ground, house high points, and an illustrative airport height surface](https://brictale.com/images/home/build/land/verify-vacant-land-airport-overlay-avigation-easement-before-buying/airport-height-envelope-profile.webp)

### Ask the surveyor for an airport-ready exhibit

The drawing does not need to be permit-ready to be useful, but it should be legible and reproducible. Request:

1. Property boundary and legal parcel identifier.
2. North arrow, scale, and survey date.
3. Proposed house corners, finished-floor elevation, roof ridge, chimney, antennas, and accessory structures.
4. Spot elevations at the house, highest object, driveway, and relevant property corners.
5. Contours or a surface model sufficient to identify grade changes across the envelope.
6. Runway or airport reference supplied by the authority, with the authority’s map or source named.
7. Horizontal distance and direction to the reference feature, with the measurement method stated.
8. Existing and proposed trees, utility poles, lighting, and temporary construction equipment if they may matter.
9. Datum, coordinate reference, benchmark, and surveyor’s notes about accuracy and limits.
10. A revision block so later design changes can be compared to the version reviewed.

A surveyor may need airport data to make the drawing meaningful. An airport sponsor may require the surveyor to use a particular airport layout plan. Ask for that instruction in writing. The homeowner should not direct a surveyor to certify an airspace conclusion outside the surveyor’s scope.

### Check horizontal placement, not only height

Moving the house can be more valuable than lowering it, but relocation may affect setbacks, access, septic reserve, drainage, floodplain, utilities, wildfire defensible space, wetlands, or the best solar orientation. Draw at least two or three feasible envelopes when the parcel allows it: a preferred location, a lower or farther-from-runway location, and a fallback location. Have the architect and site professionals test each one against all constraints. An airport-only move that creates a septic or access failure is not a solution.

For a parcel near a runway end, identify whether the house is laterally offset from the runway centerline or aligned with an approach path. For a parcel near the side of an airport, identify transitional, horizontal, or local height surfaces rather than assuming distance from the runway is enough. The relevant geometry comes from the airport and applicable rules. The homeowner’s job is to ask for the geometry and supply accurate coordinates and elevations.

### Separate FAA height review from local height review

Federal Part 77 notice evaluates a proposed object’s aeronautical effect under federal criteria. A local airport overlay may regulate height, use, population, lighting, or disclosure through a separate rule. A private recorded easement may set its own ceiling. A state airport-zoning program may add another permit. The most restrictive applicable condition may control the design, but only the authority or attorney responsible for that instrument can say how it applies.

Do not let an architect’s preliminary plan be mistaken for an FAA filing, and do not let an FAA filing be mistaken for a permit set. Label every plan “conceptual—airport and local review pending” until the responsible professionals and authorities have confirmed the status.

## 5. Use FAA Part 77 and the airport sponsor as separate federal and airport handoffs

Use the FAA’s obstruction process to answer the federal airspace question for a defined proposal, and use the airport sponsor to answer airport-specific land, noise, operational, and easement questions. These handoffs are related but not interchangeable. Current federal [14 CFR Part 77](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77) requires notice for specified construction or alteration and describes how FAA aeronautical studies evaluate a particular proposal. It does not issue the local building permit or settle a private title dispute.

### Know the current notice triggers without reducing them to a radius

Current [14 CFR § 77.9](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77) includes notice triggers for construction or alteration more than 200 feet above ground level, objects exceeding specified imaginary surfaces near qualifying airports or heliports, certain traverse ways, construction or alteration on listed airports, and cases requested by FAA. The distances and surfaces depend on the airport and runway facts in the regulation. This is why “the lot is more than X miles from the runway” is not a complete screen, and why “the house is only 28 feet high” does not answer every case.

The regulation also includes exceptions and different treatment for certain objects. Do not decide that an exception applies merely because an existing building or tree seems to shield the house. Ask the FAA or the filing professional to evaluate the actual proposal and the applicable exception. A mobile crane, drilling rig, stockpile, construction light, or temporary equipment can be relevant even when the completed house is not high enough to trigger the same question.

### Confirm the timing using current federal text

When Part 77 notice is required, current [14 CFR § 77.7](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77) requires a completed FAA Form 7460-1 and says it must be submitted at least 45 days before the proposed construction or alteration starts or before a construction-permit application is filed, whichever is earliest, subject to the regulation’s exceptions. A stale web page, old PDF, or an agent’s memory may say 30 days; use the current eCFR for the federal rule and ask the local authority for its own deadline.

The [FAA form directory](https://www.faa.gov/forms/index.cfm/go/document.information/documentID/186273) lists FAA Form 7460-1 as active with an edition date of April 7, 2025 and points the public to the electronic obstruction-evaluation system. That confirms where to obtain the current form; it does not confirm that your parcel requires a filing. The person responsible for the filing must establish the trigger, complete the coordinates and elevations, and track the determination.

### What to provide for a useful FAA review

The FAA’s airport engineering guidance describes information such as a drawing showing the object relative to active runways, distances to runway centerlines, distance along the centerline or extension from the runway end, ground elevation, proposed object height, accurate geodetic coordinates, and sketches or drawings. Use the [FAA Part 77 review guidance](https://www.faa.gov/airports/central/engineering/part77) as a preparation checklist, while confirming the current submission method and regional contact through the FAA’s airspace-analysis page.

Your package should identify every object, not just the house:

- house roof, chimney, vents, antennas, solar equipment, lightning protection, and rooftop equipment;
- detached garage, workshop, barn, pool enclosure, retaining wall, flagpole, sign, lighting, or other permanent object;
- construction crane, pump, drill rig, stockpile, temporary light, or other temporary object if the work sequence may create an aviation issue;
- existing trees to remain, proposed landscaping, and any vegetation the easement or local rule controls;
- coordinates and elevation source for each high point;
- proposal status, construction start target, and local permit filing target.

The federal regulation says an aeronautical study evaluates the specific proposal and, where appropriate, cumulative impacts with existing or proposed structures. [14 CFR §§ 77.25–77.29](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77) describes evaluation of procedures, airports, approaches, and related systems. Submit the version that the decision depends on. If the house later gains a taller roof, antenna, crane plan, or addition, ask whether a supplemental review is required rather than assuming the original result carries forward.

### Interpret a determination correctly

A federal determination can answer an air-navigation question. It is not a zoning approval, certificate of occupancy, title release, acoustical certification, septic approval, or guarantee that the airport will be quiet. Ask the filing professional to explain:

1. The determination number, date, object description, coordinates, elevation, and height.
2. Whether the determination is favorable, conditional, inconclusive, or otherwise limited.
3. Any marking, lighting, notification, construction, or maintenance condition.
4. Whether the determination applies to the entire proposed house or omits accessory and temporary objects.
5. Whether a change in location, height, equipment, or construction sequence requires a new filing.
6. Which local and airport-sponsor approvals remain open.

If the house is below the federal notice threshold, record that as “federal filing trigger not confirmed or not met for the described proposal,” not “FAA approved.” If the FAA does not conduct a study for a particular private-use airport under the applicable process, that does not erase state, local, airport-sponsor, deed, or safety review. The FAA’s [Airport Airspace Analysis guidance](https://www.faa.gov/airports/engineering/airspace_analysis) describes limits for private-use airports and directs users to the appropriate notice and contact resources.

### What the airport sponsor adds

The airport sponsor is the practical source for airport-specific facts that a federal screen may not answer: current runway use, planned runway changes, airport layout or land-acquisition plans, RPZ boundaries, noise program documents, easements held by the sponsor, preferred points of contact, and operational concerns about lights, glare, wildlife attractants, or construction activity. The sponsor may not have authority to approve your house, but its written record can prevent a local application from being built on outdated airport information.

Ask whether the airport has a public noise-compatibility program, current or future noise exposure map, airport layout plan, land inventory map, RPZ alternative analysis, or public development plan. Ask for a written confirmation of what the sponsor does not have. “No record found” and “record not searched” are different statuses.

The FAA’s [airport noise-compatibility page](https://www.faa.gov/airports/environmental/airport_noise/noise_exposure_maps) directs questions about an airport’s noise program and maps to the airport, states that FAA does not implement those programs on behalf of airports, and notes that noise exposure maps and land-use information are voluntarily prepared and not available for every sponsor. That is a reason to contact the sponsor directly, not a reason to assume no noise or no restriction exists.

### Federal and airport handoff checklist

Before moving to local application, mark each item complete:

- parcel and all object coordinates are stable enough for the next review;
- vertical datum and ground elevations are identified;
- maximum height includes projections and temporary equipment that matters;
- Part 77 trigger has been evaluated under current eCFR text;
- Form 7460-1 filing responsibility and deadline are assigned if needed;
- FAA determination is saved with its exact proposal description;
- sponsor has confirmed current airport maps, RPZ, easement, and noise records or stated that no such record is available;
- unresolved conditions are written as questions with an owner and deadline;
- the concept plan revision number matches every response.

The next handoff is the local planning or building authority, carrying the title schedule, survey exhibit, airport response, FAA record, and noise materials. Do not send only a screenshot and a verbal summary.

## 6. Verify the noise overlay and design conditions in the actual local jurisdiction

Treat airport noise as both a livability question and a land-use question. Obtain the airport’s current noise information, then verify how the parcel is treated by the local jurisdiction’s adopted map and ordinance. A noise contour is a planning model or program record, not a promise about what you will hear on a particular day. A local overlay can apply a disclosure, easement, sound-control, occupancy, density, or prohibition condition that is separate from FAA airspace review.

### Start with the airport’s map, but do not stop there

The FAA’s noise page says it collects links to airport noise exposure and land-use information from Part 150 studies and other sources such as environmental analyses and airport master plans. It also distinguishes voluntarily prepared Part 150 maps from other information and warns that not all airport sponsors have prepared noise exposure maps. Use the [FAA index](https://www.faa.gov/airports/environmental/airport_noise/noise_exposure_maps) to find the sponsor’s material, then inspect the sponsor’s own current document, date, assumptions, and map legend.

Record:

- the source airport and runway configuration;
- existing and future or forecast map, if both are supplied;
- metric and unit, such as DNL or Ldn, and its meaning in the document;
- contour date, study horizon, and whether the source is a Part 150 study, master plan, environmental document, or local map;
- whether the map shows parcel boundaries or only generalized contours;
- whether the contour crosses the parcel, house envelope, outdoor living area, or accessory area;
- the sponsor’s description of aircraft types, schedules, runway use, or limitations, if supplied;
- current and planned airport changes that could affect the map;
- the contact for noise complaints and the person who can answer land-use questions.

An airport map can be current for the airport’s program and still be insufficient for your house. It may not show every overflight, helicopter operation, training route, occasional event, ground operation, or future change. It may show an average metric rather than individual peak events. Ask the sponsor and local authority what the map is intended to establish and what it does not establish.

### Verify the overlay ordinance, not only the overlay line

Call or email the local planning office for the exact parcel and ask whether the boundary is adopted in the zoning map, a comprehensive plan, a separate airport-overlay ordinance, or another instrument. Ask for the official text and the application trigger. Specific questions should include:

1. Is a new single-family residence a permitted use, conditional use, special use, prohibited use, or use requiring a variance in the parcel’s overlay tier?
2. Does the rule apply to vacant land, existing lots, reconstruction, additions, accessory structures, subdivision, or only new development after a stated date?
3. Is a site plan, zoning certificate, building permit referral, airport review, or airport-zoning board approval required before construction?
4. Is an overflight or avigation easement required before permit issuance, before construction, before certificate of occupancy, or before sale?
5. Are acoustical treatments required, and who determines the design or verifies completion?
6. Is a buyer or future occupant notice required, and what exact document or timing applies?
7. Are there limits on density, occupancy, outdoor assembly, schools, day care, hospitals, lighting, glare, wildlife attractants, or tall vegetation?
8. Does the authority use current airport noise maps, future contours, or a local map that may differ from the airport’s map?
9. What happens when the overlay boundary bisects a parcel or house envelope?
10. What written response can the staff issue before a formal application?

Do not generalize an answer from one city or county. The [Loudoun County, Virginia Airport Impact Overlay District page](https://www.loudoun.gov/5657/Airport-Impact-Overlay-District) is a useful concrete example of why. Loudoun County describes its AIOD as a local zoning designation for properties where airport noise is anticipated at specified levels. Its page says the Ldn 65-or-higher tier does not permit new residential development; its Ldn 60–65 tier requires notice, acoustical treatments, and an overflight easement before a new residence; and its one-mile buffer requires notice. Those are Loudoun County, Virginia conditions around Dulles International Airport, not national thresholds and not a rule for every airport.

Loudoun also says the county cannot regulate aircraft noise or flight paths, but it can regulate how land around the airport is developed. That distinction is a helpful model for assigning questions: ask the airport about operations and program records, and ask the local authority about the land-use consequence. If you are in another jurisdiction, obtain that jurisdiction’s current ordinance and map instead of copying Loudoun’s terms.

### Decide whether sound control is acceptable before buying

If a residence is allowed only with acoustical treatment, ask the architect and acoustical professional to define the scope before the contingency ends. “Soundproof windows” is not a design. The team may need to coordinate windows, doors, roof and wall assemblies, ventilation, mechanical noise, air sealing, fresh-air operation, and bedroom or living-space layout. The result depends on the actual aircraft exposure, room geometry, assembly selection, installation, and ventilation strategy. Do not promise a decibel outcome without a qualified design and a stated test or verification method.

The FAA advisory circular lists sound insulation, barriers, property acquisition, and avigation easements among possible airport noise-mitigation tools, while describing a Part 150 Noise Compatibility Program as voluntary. The [FAA AC 150/5190-4B noise section](https://www.faa.gov/documentLibrary/media/Advisory_Circular/150_5190_4b_Land_Use_Compatibility.pdf) is planning guidance, not a guarantee that a particular insulation package will meet a local rule or make outdoor areas quiet. A barrier can help with some ground noise but cannot eliminate overflight noise; an enclosed, mechanically ventilated room may behave differently from an open window or porch. Ask the local authority what it requires and ask the design professional how compliance will be documented.

### Use a household acceptance test

Legal permissibility is not the same as livability. Before waiving the contract condition, write the household’s acceptance criteria:

- Are bedrooms expected to support sleep without closed windows?
- Will the household rely on a porch, backyard, or outdoor gathering space?
- Are there people who work from home, record audio, use hearing devices, or have sensory sensitivities?
- Will mechanical ventilation be acceptable during mild weather if windows are closed?
- Is a permanent overflight or noise easement acceptable to every future owner?
- Is the household willing to accept airport operations that change over time?
- Does the budget include design, acoustical review, specialized assemblies, commissioning, maintenance, and replacement?
- Is the risk of future flight-pattern or airport-use change acceptable even if today’s contour is outside the parcel?

Then visit the area at more than one time and record observations without pretending they are a professional noise survey. Visit during a representative weekday, a weekend period, morning, evening, and any airport-identified operating periods. Record weather, wind, visible operations, duration, and where you stood. A visit can reveal the household’s reaction and nearby ground activity; it cannot prove compliance with a noise ordinance or predict future exposure. Do not use a phone app as a legal or acoustical certification.

Ask the airport sponsor whether it publishes complaint data, operating hours, runway-use information, or a community-noise program. Treat complaint data as context, not as a complete measurement. The FAA page notes that airport-specific noise information belongs to the airports and may come from different kinds of studies; that variation is why the source date and method belong in your worksheet.

### Noise failure cases

**The parcel is outside the contour, so the buyer assumes it is quiet.** The contour may represent an average metric, a forecast, or a program boundary. Ask what it covers and visit the site.

**The map shows the parcel inside a contour, so the buyer assumes the house is prohibited.** The local ordinance may allow the use with conditions, or it may apply a different map. Ask the actual zoning authority for a written determination.

**The seller says the airport is “small.”** Airport size does not answer the local overlay, easement, runway, or operating question. Use the airport identifier and records.

**The local staff says sound insulation will solve it.** Ask for the exact requirement, professional responsible, verification method, and whether an easement or disclosure is also required.

**The household visits once and likes the site.** One quiet visit is not a future operating schedule or a noise study. Repeat visits and obtain current records.

The noise decision is complete only when the map source, overlay rule, title instrument, household acceptance, design condition, and future-change assumption are all visible and accepted.

## 7. Get a written local determination and hand the verified envelope into design and permitting

Ask the county, city, township, municipality, or other actual land-use authority for a written parcel-specific determination before treating the lot as viable. The response should identify the governing jurisdiction, map and ordinance version, allowed or prohibited use, applicable airport review, height or noise conditions, easement or disclosure trigger, application path, and unresolved information. A pre-application conversation is useful; a written email or letter that identifies its limits is better; a formal zoning certificate or other official determination may be necessary before closing, depending on the jurisdiction.

### Prepare the local submission

Give the local authority a complete but clearly labeled package:

- parcel number and legal description;
- current boundary/topographic survey with datum and coordinates;
- title commitment and aviation-instrument schedule, with sensitive personal information removed where appropriate;
- recorded easement and full exhibit;
- airport sponsor map, RPZ response, noise source, and contact;
- FAA filing or determination if applicable, with exact proposal description;
- conceptual site plan showing preferred and fallback house envelopes;
- finished-floor, ridge, chimney, antenna, tree, accessory, and temporary-equipment elevations;
- intended use, bedrooms, occupancy assumptions, accessory uses, and any future phase;
- specific questions and requested determination format.

Ask the authority whether a conceptual massing plan is enough for pre-application review or whether it needs a survey-grade drawing. Do not submit a plan with one height on the cover and a taller object hidden in a detail. Keep the revision number on every attachment.

### Request the answer in decision language

A helpful written response answers these questions:

| Local determination field | Example of a useful record |
| --- | --- |
| Jurisdiction | “Unincorporated [named county], [state]; county planning and building departments have land-use and building authority.” |
| Map and ordinance | Title, section, map layer, effective date, and link or attached copy. |
| Parcel status | Overlay tier, RPZ/approach status, or “not mapped” with the source date. |
| Proposed use | Single-family residence and each accessory use: allowed, conditional, prohibited, or unresolved. |
| Height | Applicable local surface, datum, maximum or review trigger, and whether projections count. |
| Noise | Contour or local tier, notice, acoustical, easement, occupancy, or disclosure condition. |
| Airport review | Sponsor referral, state review, airport-zoning board, FAA notice, or none identified. |
| Next application | Zoning certificate, site plan, special use, variance, building permit, or other named step. |
| Limits | What the staff response does not determine: title, survey, engineering, acoustics, or future changes. |

If staff will not issue a parcel-specific answer until a formal application, record the formal application’s prerequisites, fee, timeline, hearing or appeal rights, and whether the buyer can apply before owning the parcel. Ask the attorney whether the contract should make closing contingent on that process. Do not treat “we cannot pre-approve” as “probably okay.”

### Use jurisdiction-specific rules accurately

Every local example must carry its place name. Loudoun County, Virginia’s AIOD conditions are not the same as the rules in Ada County, Idaho, a Michigan township, or an airport jurisdiction in another state. Even within one state, a city, county, township, airport authority, and state aviation office may each hold a different piece of the process. The FAA’s land-use guide provides examples of compatible-planning tools but warns that examples are not official endorsement or national policy. The safe editorial and purchase practice is to name the rule’s jurisdiction every time and link to the current official document.

If the parcel is in Michigan, use Michigan’s actual state and local framework as directed by MDOT and the local authority. If it is in Loudoun County, Virginia, use Loudoun’s current AIOD map and ordinance. If it is elsewhere, replace both with that location’s actual records. Do not put “FAA airport overlay rules” in a checklist field as though the FAA owns every overlay.

### Handoff from diligence to the design team

Once the written local response arrives, hold a short handoff with the homeowner, surveyor, architect, title attorney, airport contact or filing professional, and local permit coordinator as needed. The meeting should produce one controlled design basis:

1. Approved or conditionally acceptable house envelope.
2. Prohibited areas and uses.
3. Required easement, disclosure, acoustic, marking, lighting, or airport-consultation conditions.
4. Elevation datum, coordinate system, reference runway, surface, and high-point assumptions.
5. Open decisions with owner and deadline.
6. Changes that require re-review.
7. Evidence documents stored under a clear revision and date.

The architect then designs inside the envelope and flags any proposed change that affects height, location, use, occupancy, noise, tree clearance, or airport visibility. The surveyor updates the relevant exhibit. The attorney confirms the title and easement language. The local permit coordinator carries the correct documents into the application. The buyer keeps a copy of every response and avoids relying on an unrecorded promise that disappears when staff or ownership changes.

### Safety boundaries during site and construction review

A remote article or desktop map cannot verify an obstruction, survey datum, soil condition, drainage path, or title boundary. Do not climb trees, roofs, towers, or unfinished structures to estimate height. Do not enter airport property, restricted areas, or an easement area outside the owner’s permission. Do not operate a drone near an airport without understanding the applicable aviation and local restrictions. Keep people clear of survey work, construction equipment, and any active runway environment.

During construction, the builder and site-safety professionals must control cranes, pumps, stockpiles, temporary lighting, and high equipment according to the approved plan and applicable safety requirements. A homeowner should not direct a crane operator, surveyor, or pilot from a sketch. If an object changes height or location, stop and route the change through the project’s airport and local review process. A favorable desktop review is not permission to improvise.

### What happens next

If the local response is clear and the title and airport records are acceptable, the next decision is design development: fix the house envelope, finish the site survey, prepare any acoustical or easement documents, and move into the named permit path. If the response requires a redesign, return to the alternatives rather than negotiating against an unknown rule. If the authority requires a formal application that cannot be completed before the contract deadline, ask the attorney about an extension, an option, a contingency, or walking away. The right next step is the one that preserves the buyer’s ability to say no while a material constraint remains unresolved.

## 8. Use the parcel-to-house airport constraint worksheet to make a documented go, adjust, or walk decision

Use the worksheet below as the original Brictale contribution: it consolidates the title, RPZ, elevation, FAA, noise, sponsor, and local-permit handoffs into one review surface. It is deliberately a decision record, not an official inspection form or a substitute for a survey, attorney, architect, acoustical professional, airport sponsor, FAA filing professional, or local authority. A parcel is not “green” because every row has a URL; it is green only when the evidence answers the row for the proposed house and the responsible person has accepted it.

The worksheet’s **method** is: Record the runway and RPZ relationship, title instruments, survey elevations and height datum, proposed finished-floor and roof elevations, noise and avigation conditions, FAA notice trigger, local permit trigger, responsible authority, evidence link, date, and sign-off status; then test the house envelope against each constraint and document the next handoff. For elevation sensitivity, distinguish an updated parcel-elevation input with the external runway reference held fixed from a common datum or benchmark shift, which must be applied consistently to every affected elevation. Its **limitations** are: This is an illustrative due-diligence tool, not a survey, title opinion, FAA determination, zoning approval, acoustical design, engineering report, or aviation-law review. FAA guidance and federal regulations do not replace the actual local rules, airport records, or professional review for a particular parcel.

### Parcel-to-house airport constraint worksheet

Copy this table into your diligence notes. Use one row per constraint and attach the source document, not merely a homepage.

| Constraint | Inputs to record | Responsible authority or professional | Verification test | Status and next handoff |
| --- | --- | --- | --- | --- |
| Parcel identity | State, county/city/township, parcel ID, legal description, acreage, contract dates | Buyer, title company, attorney | Parcel ID and legal description match survey, title, tax map, and airport inquiry | Open / verified; who acts next |
| Airport identity | Airport name, identifier, sponsor, airport type, nearest runway ends | Airport sponsor and local planning office | Two independent records identify the same airport and sponsor | Open / verified; contact |
| RPZ relationship | Current RPZ map, runway end, geometry, map date, distance to proposed improvements | Airport sponsor, state aviation office where applicable, local authority | Survey overlay shows each house and accessory use relative to authoritative RPZ | Outside / inside / unclear; redesign or authority reply |
| Recorded aviation instrument | Instrument number, grantor/grantee, rights, restrictions, term, full exhibit | Title company and real-estate attorney | Exact instrument and exhibit are read, mapped, and applied to proposed objects | Accept / amend / release / unresolved |
| Exhibit or map reference | Exhibit X/A or equivalent, scale, north arrow, legal description, obstructions | Title attorney, surveyor, airport sponsor | Exhibit aligns with current boundary/topographic survey | Verified / mismatch / missing |
| Ground elevation | Spot elevation, contours, benchmark, vertical datum, survey date | Licensed surveyor | Surveyor confirms the ground surface at each high object | Datum accepted / resurvey needed |
| Proposed finished floor | Finished-floor elevation and basement/crawlspace assumptions | Architect and surveyor | Local authority and airport filing package use same datum and revision | Accepted / revise |
| Proposed roof and projections | Ridge, parapet, chimney, antenna, solar, vents, tree and temporary-equipment heights | Architect, surveyor, FAA filing professional | Highest point is explicit and its coordinate/elevation is reproducible | Below/within review / exceeds / unclear |
| Federal notice | Part 77 trigger, Form 7460-1, submission date, case number, determination | FAA filing professional or project sponsor | Current eCFR and FAA response match exact proposal | Not triggered / filed / determined / revisit on change |
| Sponsor review | Current layout, land acquisition, runway, RPZ, noise, and easement records | Airport sponsor | Sponsor identifies record date, gaps, and review contact in writing | Complete / records pending |
| Noise exposure | Map type, DNL/Ldn metric, contour date, assumptions, future map | Airport sponsor and local authority | Map overlay and source scope are recorded; household visits at varied times | Accept / design / local condition |
| Local overlay | Official map, ordinance section, effective date, tier, bisected-boundary treatment | Actual county/city/township/municipality | Written response identifies use, height, noise, airport, and permit conditions | Approved path / formal application / unresolved |
| Sound-control condition | Required assemblies, ventilation, acoustical professional, verification method | Architect, acoustical professional, local authority | Written local condition has design and acceptance criteria | Accepted / price and design / unresolved |
| Future change | Addition, accessory building, tree growth, solar, antenna, airport expansion | Homeowner, architect, sponsor, local authority | Conditions explain what change requires re-review | Recorded in ownership file |

The “status” field should use a controlled vocabulary. Use **verified** when the source is current, the scope fits the row, and the responsible person has accepted the input. Use **conditional** when the path is clear but a named requirement remains. Use **unclear** when the source is missing, informal, stale, contradictory, or too general. Use **not applicable** only when the responsible authority confirms why the row does not apply; do not use it because the buyer did not ask.

### Decision matrix for the final call

| Result | Minimum evidence | Buyer action |
| --- | --- | --- |
| Go | Title instruments and exhibits acceptable; RPZ and local overlay reviewed; house elevations and location fit; required federal and local reviews identified or complete; noise conditions accepted by the household | Preserve the evidence set, proceed with controlled design, and carry conditions into contract and permits |
| Adjust | A specific house feature fails or is conditioned, but an alternate envelope has a written path and does not create a different site failure | Have the architect and surveyor revise the envelope, then resubmit the changed inputs to each affected authority |
| Hold | A material record or determination is missing, but the contract can preserve time and a named authority can answer | Extend or restructure the diligence condition with attorney advice; do not waive it for a verbal assurance |
| Walk | Residential use is prohibited, the easement cannot accommodate the essential house, the usable area cannot fit required improvements, or the household rejects the noise and future-use risk | Use the contract remedy or decline to close after attorney review |

One red row does not always mean walk; it means identify whether the row is fatal, redesignable, curable, or merely pending. One green map does not always mean go; title, local use, noise, and future-change rows can still control.

![Decision map routing verified airport constraints to go, adjust, hold, or walk outcomes and named next handoffs](https://brictale.com/images/home/build/land/verify-vacant-land-airport-overlay-avigation-easement-before-buying/go-adjust-hold-walk-handoff.webp)

### Illustrative sensitivity record

Return to the modeled example above. Its initial antenna screen showed 17.5 feet of apparent clearance under a hypothetical 50:1 surface. The worksheet should not record only “passes.” It should record:

```text
Input: ground elevation                 742.6 ft NAVD88
Input: ridge height above ground          26.0 ft
Input: chimney height above ridge          3.0 ft
Input: antenna height above ridge          9.0 ft
Input: runway reference elevation        755.1 ft NAVD88
Input: horizontal distance             2,000.0 ft
Input: screening slope                    50:1
Output: antenna elevation                777.6 ft NAVD88
Output: screening surface                795.1 ft NAVD88
Output: apparent screening clearance      17.5 ft
Sensitivity: parcel ground +4.0 ft      clearance 13.5 ft
  (updated survey input; runway reference unchanged)
Common datum +4.0 ft to all elevations  clearance 17.5 ft
Sensitivity: 40:1 alternative surface     27.5 ft under the same inputs
Sensitivity: 100:1 alternative surface   -2.5 ft under the same inputs
```

The parcel-elevation line is a scenario in which a new survey changes the parcel input while the independently supplied runway reference stays fixed; it is not a one-sided datum correction. The common-datum line shows the opposite case: when the same +4.0-foot adjustment applies to every affected elevation, object and surface move together and clearance stays 17.5 feet. The “40:1” and “100:1” lines are scenario sensitivities, not claims that either surface applies. The negative result in the 100:1 scenario means the envelope would exceed that hypothetical plane; it does not say the FAA or local authority will use it. This is useful because it tells the buyer what to ask: Which surface and reference does the authority apply, what is the controlling datum, and does the result change for the chimney, antenna, crane, tree, or future addition? The worksheet makes uncertainty visible instead of hiding it inside a reassuring label.

### Originality brief: what this adds and how to check it

**Current answers:** Existing federal compatibility guidance explains airport land-use tools, FAA materials explain airspace notice and noise-program resources, and state or local programs publish sample avigation easements, RPZ policies, and overlay rules. Those answers are usually written for airport programs, planners, agencies, or a single jurisdiction. They do not usually organize the homeowner’s parcel-to-house sequence from title search through local permit handoff.

**Missing decision:** The missing decision is whether this particular vacant parcel can carry the intended house, not whether an airport is nearby or whether an airport map exists. The buyer must combine the recorded instrument, map geometry, survey datum, house elevations, noise conditions, federal filing, sponsor records, and local determination before the contract deadline.

**Original contribution:** The “Parcel-to-house airport constraint worksheet” converts each constraint into inputs, responsible authority, verification test, evidence status, and next handoff. Its worked elevation screen shows units, formulas, assumptions, and sensitivity. The rows intentionally separate federal, state, sponsor, title, design, and local responsibilities so that one authority’s answer is not broadened into another authority’s approval.

**How it can be checked:** A reviewer can compare each worksheet row with the source record, confirm that every evidence link supports the scope stated, reproduce the arithmetic from the displayed inputs, inspect whether the house’s highest point and datum are explicit, and verify that local examples carry their actual jurisdiction. The reviewer can also test the failure branches: missing exhibit, changed roof, inside-RPZ location, stale noise map, unresolved local overlay, and verbal-only approval. The worksheet passes as an editorial contribution only if it helps a reader identify a real next decision; it is not evidence that any real parcel is buildable.

**Limitations:** This worksheet does not measure aircraft noise, establish a boundary, interpret title, determine an easement’s enforceability, calculate a permit-ready obstruction surface, or predict future airport operations. FAA guidance and federal regulations do not replace local zoning, building, state aviation, airport-sponsor, survey, acoustical, engineering, or aviation-attorney review. The modeled elevations are illustrative. The local example from Loudoun County, Virginia and the easement examples from Michigan are jurisdiction-specific and must not be copied into another state or county.

### Keep the record useful after closing

The airport constraint file should become part of the home’s permanent records. Keep the final survey, approved site plan, easement and exhibit, FAA determination, local zoning response, sound-control design, airport correspondence, and any conditions that affect future additions. Record the assumptions that made the house acceptable: maximum ridge elevation, antenna limit, no-tree-growth zone, approved house location, required ventilation, or disclosure language. Give the future owner enough context to understand why a later addition, cupola, tall tree, solar rack, or detached building needs review.

At handover, ask the builder to provide photographs or records showing the built house’s actual high points and any required measures, subject to the local authority’s process. The builder’s record does not replace a final professional survey or government sign-off. If construction changed the roof, site grade, house location, chimney, antenna, crane sequence, or tree plan, route the change through the responsible reviewer before treating the original decision as current.

The next decision after this worksheet is not “buy because the table is complete.” It is one of three controlled handoffs: proceed into design and permitting with accepted conditions, redesign and repeat the affected rows, or preserve the contract remedy and walk away. That is the point of the surface: it turns airport proximity from a vague concern into a documented, jurisdiction-aware land decision.

## Evidence

- The FAA airport land-use guide says the federal government cannot dictate local land-use policies and identifies state and local governments as responsible for land-use planning, zoning, and regulation; the guide is a resource rather than FAA regulation or official agency policy. [Land Use Compatibility and Airports](https://www.faa.gov/sites/faa.gov/files/land_use_airports.pdf). Scope: FAA Southern Region task-force resource for airport-compatible land-use planning; use for the division between federal aviation guidance and state/local land-use authority, not as a parcel-specific approval or national zoning rule.. Accessed: 2026-09-08.
- FAA AC 150/5190-4B states that avigation easements can limit new structures that penetrate a described surface or land uses detrimental to aircraft operations, and that overflight/avigation easements run with the encumbered land title and bind succeeding owners to the described controls. [AC 150/5190-4B Airport Land Use Compatibility Planning](https://www.faa.gov/documentLibrary/media/Advisory_Circular/150_5190_4b_Land_Use_Compatibility.pdf). Scope: FAA advisory circular, sections 5.3.3.1–5.3.3.2; describes common easement functions and title effect in compatible-land-use planning. The recorded instrument controls the parcel-specific language.. Accessed: 2026-09-08.
- FAA AC 150/5190-4B describes a 14 CFR Part 150 Noise Compatibility Program as a voluntary planning activity and lists noise/avigation easements and sound insulation among possible mitigation measures; it also notes that mandatory noise or access restrictions require FAA approval under 14 CFR Part 161. [AC 150/5190-4B Airport Land Use Compatibility Planning](https://www.faa.gov/documentLibrary/media/Advisory_Circular/150_5190_4b_Land_Use_Compatibility.pdf). Scope: FAA advisory circular, section 5.4; identifies planning and mitigation tools, not a universal residential noise limit or a promise that insulation makes a parcel suitable.. Accessed: 2026-09-08.
- The FAA noise-compatibility page directs questions about an airport's noise compatibility program and noise exposure maps to the airport, says FAA does not implement those programs for airports, and notes that noise exposure maps and land-use information are voluntary and not all airport sponsors have prepared them. [Airport Noise Compatibility Planning Information](https://www.faa.gov/airports/environmental/airport_noise/noise_exposure_maps). Scope: FAA public index last updated January 8, 2026; applies to the listed US airport information and explains why a homeowner must verify current sponsor and local records rather than rely on a universal FAA map.. Accessed: 2026-09-08.
- Current 14 CFR 77.7 requires a completed FAA Form 7460-1 when Part 77 notice is required and sets submission at least 45 days before the proposed construction or alteration starts or before a construction-permit application is filed, whichever is earliest, subject to the regulation's exceptions. [eCFR, 14 CFR Part 77—Safe, Efficient Use, and Preservation of the Navigable Airspace](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77). Scope: Current federal regulation, § 77.7; the notice timing is a federal filing requirement and does not establish a local permit deadline or approval.. Accessed: 2026-09-08.
- Current 14 CFR 77.9 includes notice triggers for construction or alteration more than 200 feet above ground level, objects exceeding specified imaginary surfaces near qualifying airports or heliports, certain traverse ways, all construction or alteration on listed airports, and cases requested by FAA. [eCFR, 14 CFR Part 77—§§ 77.5 and 77.9](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77). Scope: Current federal regulation; distances and surfaces depend on the airport/runway facts defined in Part 77. Do not reduce the rule to a single radius or infer that a small house is automatically outside review.. Accessed: 2026-09-08.
- Current 14 CFR 77.25–77.29 describes an aeronautical study as an evaluation of the specific proposal, including where appropriate cumulative impacts with existing or proposed structures, and lists effects on procedures, airports, approaches, and related systems among the factors FAA may evaluate. [eCFR, 14 CFR Part 77—Aeronautical Studies and Determinations](https://www.ecfr.gov/current/title-14/chapter-I/subchapter-E/part-77). Scope: Current federal regulation, Subpart D; supports submitting a defined house envelope and not treating a parcel-only map check as a completed determination.. Accessed: 2026-09-08.
- The FAA's form directory lists FAA Form 7460-1, Notice of Proposed Construction or Alteration, as active with an edition date of April 7, 2025 and points users to the FAA's electronic obstruction-evaluation system for public access. [Form FAA 7460-1—Notice of Proposed Construction or Alteration](https://www.faa.gov/forms/index.cfm/go/document.information/documentID/186273). Scope: FAA form directory status page; confirms the current form source, not whether a particular parcel or house requires notice.. Accessed: 2026-09-08.
- FAA Part 77 regional guidance says a Form 7460-1 submission should include a scaled drawing locating the object relative to active runways, runway-centerline distances, distance from the runway end, site ground elevation, the full object height including appurtenances, accurate NAD 83 geodetic coordinates, and construction sketches or drawings. [Notification of Proposed Construction or Alteration on Airport Part 77](https://www.faa.gov/airports/central/engineering/part77). Scope: FAA Central Region engineering guidance, Form of Notification section; use as a submission-preparation checklist and confirm the current regional process for the parcel, not as a parcel-specific determination or universal filing rule.. Accessed: 2026-09-08.
- The FAA Airport Airspace Analysis page says an airport airspace analysis is not conducted for private-use airports unless the airport is operated by a federal agency or the Department of Defense, or the private-use airport has at least one FAA-approved instrument approach procedure; it separately notes that private-use airports remain subject to Part 157 notification requirements. [Airport Airspace Analysis (AAA)](https://www.faa.gov/airports/engineering/airspace_analysis). Scope: FAA Airport Airspace Analysis page, private-use-airport paragraph; explains the federal AAA process boundary and does not remove state, local, airport-sponsor, title, or safety review.. Accessed: 2026-09-08.
- Michigan MDOT defines a runway protection zone as a two-dimensional trapezoidal area at ground level before a runway threshold or beyond a runway end, says federally funded airports must control RPZs from incompatible land uses, and states fee acquisition must be considered before an avigation easement when the property is in an RPZ. [Avigation Easement & Runway Protection Zones](https://www.michigan.gov/mdot/travel/mobility/aeronautics/land/avigation-easement-and-runway-protection-zone). Scope: Michigan Department of Transportation guidance for Michigan airport land projects; an example of state/program practice, not a national RPZ rule or a determination for another state.. Accessed: 2026-09-08.
- Michigan MDOT says Exhibit X is a required drawing or sketch that is part of the avigation-easement document and graphically depicts the area encumbered by the easement restrictions and obstructions to the approach surface. [Avigation Easement & Runway Protection Zones](https://www.michigan.gov/mdot/travel/mobility/aeronautics/land/avigation-easement-and-runway-protection-zone). Scope: Michigan-specific easement-document example and samples; use the actual recorded exhibit and local form in the parcel's jurisdiction.. Accessed: 2026-09-08.
- Michigan MDOT identifies Michigan-specific airport airspace and zoning authorities and resources, including the Michigan Tall Structures Act, Michigan Aeronautics Code, Michigan Zoning Enabling Act, Airport Zoning Act, and federal Part 77; it describes regulation of the height, location, and identification characteristics of certain structures around licensed public-use airports. [Airspace and zoning](https://www.michigan.gov/mdot/travel/mobility/aeronautics/airspace-zoning). Scope: Michigan state page; illustrates why state and local airport-zoning layers must be checked in the named jurisdiction rather than inferred from federal guidance.. Accessed: 2026-09-08.
- Loudoun County, Virginia's Airport Impact Overlay District is a local zoning designation tied to specified anticipated noise levels; the county page states that its Ldn 65-or-higher tier does not permit new residential development, while its Ldn 60–65 tier requires notice, acoustical treatments, and an overflight easement before a new residence, subject to the county's actual ordinance and map. [Airport Impact Overlay District—Loudoun County, Virginia](https://www.loudoun.gov/5657/Airport-Impact-Overlay-District). Scope: A current local example for Loudoun County, Virginia around Dulles International Airport; not a national threshold, not a rule for other Virginia counties, and not a substitute for the county's official map, ordinance, or written determination.. Accessed: 2026-09-08.