In Texas, as in the rest of the United States, the traditional legal doctrine of Cujus est solum, ejus est usque ad coelum (whoever owns the soil owns up to the heavens) has been significantly curtailed by modern aviation law. According to the landmark 1946 Supreme Court case United States v. Causby, a landowner does not own the infinite sky, but they do possess rights to the "immediate reaches" of the airspace necessary for the use and enjoyment of their land. While Texas law does not define a specific "foot-level" cutoff for ownership, the Federal Aviation Administration (FAA) generally maintains jurisdiction over "navigable airspace," which typically begins at 500 feet above the ground in uncongested areas and 1,000 feet in congested zones. Below these altitudes, a Texas homeowner has a "presumed right" to the air directly above their property to prevent nuisances or trespasses. For example, if a neighbor’s drone or a low-flying private aircraft interferes with your reasonable use of the property (like flying consistently at 80 feet), you may have a legal claim for trespass or invasion of privacy under the Texas Privacy Act. Essentially, you own enough of the air to build a house, plant tall trees, and enjoy your privacy, but the space above that "lower stratum" is considered a public highway for air travel that you cannot control or block.