There isn’t one universal number of feet. In the United States, a landowner’s rights above the surface generally cover the low airspace closely connected to use of the land, not all the way to the sky. Below the surface, ownership can be divided: mineral rights and other underground interests may belong to someone other than the surface owner. The exact answer depends on the state, the parcel’s title history, and the facts.
How far above your land do your rights extend?
U.S. law does not give every landowner a fixed airspace ceiling. The Supreme Court addressed the issue in United States v. Causby (1946), a case involving frequent, low military-airport flights that interfered with the owners’ use of their property. The Court rejected the idea that ownership extends without limit “to the periphery of the universe.” It described the airspace beyond the immediate reaches above land as public domain, while recognizing a property interest in the low airspace closely connected with the land’s use.
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The Court put the limit this way: “The airspace, apart from the immediate reaches above the land, is part of the public domain. We need not determine at this time what those precise limits are.” United States v. Causby, 328 U.S. 256 (1946).
That qualification is important: the Court did not set a height in feet. Instead, the Causby rule looks at whether flights are sufficiently low and frequent to directly and immediately interfere with the land’s use and enjoyment. A flight over a parcel is not automatically a trespass or a taking. The Supreme Court later discussed the limits of airspace claims in Laird v. Nelms, 406 U.S. 797 (1972); high-altitude flights alone do not automatically invade a property interest.
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Aircraft and drone rules do not set a property boundary
An aircraft’s minimum operating altitude or a drone’s flight limit is not a universal measurement of how much airspace a landowner owns. Those rules address aviation operations; they do not replace the fact-specific property analysis described in Causby.
How far below your land do your rights extend?
There is no universal underground depth cutoff established here, and owning the surface does not necessarily mean owning every resource below it. Mineral rights are real-property interests that can be conveyed separately from the surface estate. A deed may reserve or transfer them, and state law, title history, leases, and resource-specific rules can also affect what an owner controls. The distinction between surface and mineral ownership is described by the Legal Information Institute’s overview of mineral rights.
As a result, the surface owner may not be the mineral owner. Nor does a general rule about mineral rights establish who owns every underground space or resource in a particular location; that requires looking at the relevant documents and law.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to find the answer for your parcel
- Identify the state and county. Property interests are shaped by local law, so a general U.S. rule cannot resolve a parcel-specific question.
- Review the deed and title history. Look for language reserving or conveying minerals or other subsurface interests, and check for recorded leases or related instruments.
- Get help interpreting unclear records. A title professional or real-estate attorney in the relevant jurisdiction can explain how the documents and local rules apply to your parcel.
The practical answer is therefore not a number measured upward or downward from the property line. Above ground, the key issue is the relationship between low airspace and use of the land; below ground, it is which interests the owner actually holds under the deed, title history, and applicable law.
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