You own the air rights above your property only up to the height you can reasonably occupy or use in connection with the land. Everything higher belongs to the public under federal law, and the boundary between the two zones is functional rather than a fixed number of feet.
How High Your Ownership Actually Reaches
The controlling standard comes from the 1946 Supreme Court decision in United States v. Causby. The Court rejected the old common-law rule that a landowner owned the column of air all the way to the heavens, calling it a doctrine with “no place in the modern world.” In its place, the Court held that a landowner “owns at least as much of the space above the ground as he can occupy or use in connection with the land,” and “must have exclusive control of the immediate reaches of the enveloping atmosphere” to fully enjoy the property.1LII / Legal Information Institute. United States v Causby et ux
That phrase, “immediate reaches,” is what you actually own. It covers the space your house, trees, antennas, and any reasonable future improvements occupy or could occupy. It doesn’t come with a specific altitude attached, and courts decide close cases based on how the airspace is being used, not a preset number.
Where Public Airspace Begins
Congress declared that the United States government holds exclusive sovereignty over the nation’s airspace, and that every citizen has a public right of transit through “navigable airspace.”2Office of the Law Revision Counsel. 49 USC 40103 – Sovereignty and Use of Airspace The FAA sets the minimum altitudes that mark where that public zone starts.
Over cities, towns, and other congested areas, aircraft must fly at least 1,000 feet above the highest obstacle within a 2,000-foot horizontal radius. Over rural or sparsely populated areas, the minimum drops to 500 feet above the surface.3eCFR. 14 CFR 91.119 – Minimum Safe Altitudes General Above those altitudes, the airspace is public and a plane passing overhead gives you nothing to complain about. Below them, aircraft generally shouldn’t be there at all outside of takeoff and landing.
When Overflights Cross the Line
Causby also set the test for when repeated low flights amount to a constitutional taking. In that case, military bombers passed over a chicken farm at roughly 83 feet, so low they blew leaves off the trees and panicked the birds into killing themselves against walls. The Court held that “flights over private land are not a taking, unless they are so low and so frequent as to be a direct and immediate interference with the enjoyment and use of the land.”1LII / Legal Information Institute. United States v Causby et ux
A follow-up case, Griggs v. Allegheny County (1962), extended that rule to civilian airports and put the compensation obligation on the local authority operating the airport rather than the federal government. Approach paths, the Court reasoned, are as essential to an airport as the runways.4Justia Law. Griggs v Allegheny County, 369 US 84 (1962)
If you live near an airport and low flights substantially interfere with the use of your property, you may have an inverse condemnation claim against the airport operator. The government hasn’t formally taken your land, but the repeated intrusions function as a taking that requires just compensation under the Fifth Amendment. Courts weigh how low the flights are, how often they occur, and how badly they interfere with normal use. A few noisy flights during the day rarely qualify. Constant low passes that rattle windows, drown out conversation, and depress property values often do.
Drones Over Your Property
Drones sit in an unresolved zone. Under FAA rules, small drones (under 55 pounds) can’t fly higher than 400 feet above ground level.5eCFR. 14 CFR 107.51 – Operating Limitations for Small Unmanned Aircraft That ceiling puts essentially every legal drone flight inside the zone that Causby reserved to landowners. The FAA also requires registered drones to broadcast identification and location through its Remote ID system, which functions as a digital license plate.6Federal Aviation Administration. Remote Identification of Drones
Federal law doesn’t say at what altitude a drone crossing your yard becomes trespass, and no federal court has drawn a definitive line. States have filled part of the gap, mostly by regulating drone-based surveillance or image capture over private property without consent. At least one state makes flying a drone within 50 feet of a home without permission a misdemeanor. The common focus of these state laws is privacy rather than a fixed altitude.
Practically, a drone hovering at treetop level over your backyard, especially one with a camera, is far more likely to be actionable than one passing through at 350 feet on its way somewhere else. If a drone is being used to look into your home or yard, state privacy and surveillance statutes usually give you stronger footing than a common-law trespass claim.
How High You Can Build
Owning the immediate airspace above your land doesn’t mean you can build to any height you want. Several layers of restrictions apply.
- Local zoning and building codes. Most municipalities cap building heights through zoning. Residential zones commonly limit structures to 35 to 45 feet, while commercial zones vary widely. This is the constraint most homeowners hit first.
- FAA obstruction standards. Any structure taller than 200 feet above ground level triggers a mandatory notice to the FAA before construction. The FAA then studies whether the structure would be a hazard to air navigation. Properties near airports face extra scrutiny at lower heights.7eCFR. 14 CFR 77.9 – Construction or Alteration Requiring Notice8eCFR. 14 CFR Part 77 – Safe, Efficient Use, and Preservation of the Navigable Airspace
- Utility easements. Power lines and communication cables cross private property under easements that reserve a defined corridor of airspace, typically requiring roughly 15 to 18 feet of vertical clearance depending on the line type and the surface below. You cannot build or plant into that clearance zone.
Selling Unused Air Rights
In dense urban areas, the unused development capacity above your building can be worth a great deal. If zoning allows a 20-story tower and you have a 3-story structure, the difference represents transferable air rights. Many cities let owners sell those unused rights to nearby developers under Transfer of Development Rights (TDR) programs.
The property selling the rights, the “sending” parcel, usually records a restrictive covenant or easement limiting its own future development. The buyer, the “receiving” parcel, applies the purchased rights to gain extra density or height. Some cities run municipal banks that buy, hold, and resell development rights; others leave TDR entirely to private negotiation. Pricing has no universal formula and depends on zoning, the receiving site’s potential, market conditions, and how badly the developer wants the extra square footage. For suburban and rural owners, air rights typically have little market value. In high-density cities, a single deal can run into the millions.
Neighbor Encroachments Into Your Airspace
The most common airspace disputes are ground-level: tree branches, roof overhangs, gutters, or additions that cross the property line above the surface. Property law treats these as trespass, and a physical invasion of your airspace is generally actionable even without proof of specific damage.
- Self-help. In most jurisdictions you can trim a neighbor’s branches back to the property line at your own expense without a court order. You generally cannot enter the neighbor’s property to do it, and you cannot cut the tree down.
- Injunction. A court can order the removal of a structural encroachment such as a roof overhang or fence intrusion. Courts are more willing to grant an injunction when the encroachment is substantial. A gutter extending six inches over the line may not warrant one if it causes no real harm.
- Damages. If the encroachment reduces your property value or interferes with your use of the land, you can seek monetary compensation.
The same reasoning applies to a drone that lingers low over your yard. A brief transit is unlikely to support a trespass claim in most courts. A drone hovering at low altitude, especially one capturing images, looks much closer to the kind of direct interference courts have historically treated as actionable.
Sunlight and Wind Access
Air rights don’t automatically include the sunlight or wind that flows through your airspace. Common law generally does not guarantee solar or wind access across a neighbor’s property, so a neighbor typically has no duty to keep trees trimmed or buildings low to protect your solar panels or wind turbine.
The main protection is a solar or wind easement, a written agreement recorded against the neighboring property that restricts development or vegetation blocking your access. Some states have solar access statutes that make these easements easier to create and enforce; others leave it to private negotiation. Without a recorded easement, you usually have no remedy if a neighbor’s new construction shades your panels. If you’re planning a solar installation, securing an easement in advance is worth far more than trying to litigate the problem after it appears.