An avigation easement is a recorded property interest that gives an airport or government body the right to fly aircraft through the airspace above your land, along with the right to produce the noise, vibration, and dust that come with those operations. It runs with the land, so it binds every future owner, and it usually limits how tall anything on the property can be. In return, the landowner typically receives a one-time payment based on how much the easement reduces the property’s market value.
What the Airport Gets
The central right is free and unobstructed passage for aircraft through the airspace above the property at the altitudes the easement document specifies. That covers planes on approach, departure, and circling maneuvers tied to the nearby runway. Because those flights often occur low enough to interfere with normal use of the ground below, the easement also shields the airport from nuisance and trespass claims.
Most avigation easements go further and grant the right to generate the noise, vibration, and dust that come with aircraft operations. By accepting the easement, the landowner waives the ability to sue for those disturbances so long as the airport stays within the scope of what the document permits. If operations later exceed that scope, the waiver no longer covers them and the landowner’s claims revive.
Restrictions on Your Property
Height limits are the most consequential restriction. The easement prohibits any structure, antenna, crane, or tree from penetrating a set of imaginary surfaces that slope upward and outward from each runway. Federal regulations define those surfaces, and any object that pierces them is classified as an obstruction to air navigation.1eCFR. 14 CFR 77.17 – Obstruction Standards Trees that grow into the protected airspace have to be topped or removed, and the easement typically gives the airport the right to enter the property and do that work itself.
Beyond height, avigation easements commonly bar activities that could create hazards for pilots. Bright lights and reflective surfaces that produce glare on approach are restricted. Smoke or steam that reduces visibility near the runway is prohibited. Equipment that could interfere with radio communication between aircraft and air traffic control is barred. These provisions come from the easement language itself, which airports tailor to the hazards associated with each parcel’s location relative to the runway.
How the Easement Gets Onto Your Property
Voluntary Purchase
The most common path is a negotiated sale. The airport authority commissions an appraisal, offers the appraised loss in value, and if the owner agrees, the parties sign an easement deed that gets recorded in the local land records. Projects funded through the federal Airport Improvement Program must follow the Uniform Relocation Assistance and Real Property Acquisition Policies Act during acquisition.2Federal Aviation Administration. AC 150/5100-17 – Land Acquisition and Relocation Assistance for Airport Improvement Program Assisted Projects
Condemnation
When negotiations fail, the airport can use eminent domain. It files a condemnation action, a court confirms the public necessity of the taking, and the owner receives just compensation set by the court. Owners can present their own appraisal evidence and challenge the government’s valuation. The process is slower and more expensive for both sides, which is why authorities generally prefer voluntary agreements.
Subdivision Dedication
New development near airports often triggers avigation easement requirements through local planning. A planning commission may require developers to dedicate avigation easements as a condition of plat approval.3Federal Aviation Administration. AC 150/5190-4B – Airport Land Use Compatibility Planning No cash changes hands in that scenario. The developer accepts the encumbrance as part of getting the project approved, and future buyers get notice through the recorded plat.
Inverse Condemnation
Sometimes airport operations effectively take a property right without anyone acquiring a formal easement. When overflights are low, frequent, and disruptive enough, the landowner can file an inverse condemnation claim arguing that the airport has taken an easement in practice and must pay for it. The Supreme Court in United States v. Causby held that flights “so low and so frequent as to be a direct and immediate interference with the enjoyment and use of the land” amount to a taking that requires just compensation.4Cornell Law Institute. United States v. Causby – 328 U.S. 256 (1946) These claims are fact-intensive and costly to litigate, but they remain a safeguard for owners near airports that expand operations without updating their easement holdings.
How Compensation Is Calculated
Appraisers use a before-and-after method. First they value the property free of any flight-related restrictions. Then they value it again as if the easement were already in place, accounting for noise exposure, height limits, and use restrictions. The gap between the two figures is what the airport owes.
Proximity to the runway end drives the largest reductions. Properties under arrival and departure paths that experience noise above 65 decibels Day-Night Average Sound Level, the FAA’s threshold for incompatible residential land use, tend to lose the most value.5Federal Aviation Administration. Community Response to Noise The severity of the height restriction matters too. A cap that prevents two-story construction cuts what a developer could build on the land, which cuts what the land is worth. Properties inside a Runway Protection Zone see the steepest discounts because the FAA considers most intensive uses incompatible there.
When only part of a parcel is burdened, appraisers also calculate severance damages, which capture the loss in value to the remainder caused by the easement’s presence on the affected portion. Courts in most jurisdictions require the appraiser to assume the airport will use its acquired rights to the fullest extent the easement allows, not just the level of interference the airport intends today. That assumption protects the landowner from being undercompensated if operations grow.
Tax Treatment of the Payment
Compensation for granting an avigation easement is not ordinary income. The IRS requires the payment to be subtracted from the property’s cost basis. If a specific portion of the parcel is affected, only that portion’s basis is reduced. When it is impractical to isolate the affected portion, the basis of the entire property is reduced by the amount received.6Internal Revenue Service. Publication 544 – Sales and Other Dispositions of Assets
Any payment that exceeds the property’s adjusted basis becomes taxable gain, reported as a sale of property. For easements taken through condemnation or the credible threat of it, the transaction is treated as a forced sale, and involuntary conversion rules may let the owner defer the gain by reinvesting the proceeds in similar property. In practical terms, many homeowners owe no immediate tax because the payment simply reduces what they paid for the property on paper. The tax bill shows up later, at the time of sale, as a lower basis and therefore a larger capital gain.6Internal Revenue Service. Publication 544 – Sales and Other Dispositions of Assets
Who Pays for Trimming and Enforcement
The question owners ask most is who pays to keep trees trimmed below the height limit. The answer depends on the easement language. Most avigation easements grant the airport the right to enter the property and remove vegetation that penetrates the protected airspace, which strongly implies the airport bears the cost. Some easements are more explicit and assign the obligation directly. If the document is silent, expect the airport to handle it, but read the wording before assuming.
Enforcement is built to favor the airport. A typical FAA model easement gives the airport a perpetual right of entry and the authority to remove any new structure or vegetation that was not specifically accepted when the easement was granted.7Federal Aviation Administration. Surface and Overhead Avigation Easement If a landowner builds something that violates the height restriction, the airport can remove it, and the landowner has already waived the right to sue for damages from that removal. Most disputes never reach that point because permit offices in airport overlay zones check proposed construction against the easement limits before issuing permits.
Buying or Selling an Encumbered Property
Because the easement runs with the land, it binds every subsequent buyer. The encumbrance appears in the title records, and any competent title search will flag it. Most states require sellers to disclose known encumbrances or recorded easements, though the specifics vary. Buyers who skip a title search or ignore the disclosure take on all of the restrictions without any of the original compensation.
The market impact is real but uneven. Properties directly under the flight path with significant noise exposure sell at noticeable discounts. Properties on the edges of the easement area may show little measurable effect. Mature tree buffers between the property and the runway can partially offset the stigma, though those same trees may eventually need to be cut if they grow into the protected airspace. Read the easement document before closing, not just the seller’s disclosure. It spells out exactly what you cannot build, what the airport can do on your property, and what rights the previous owner already gave up on your behalf.