My understanding is the issue of airspace above private property hasn't been completely settled. The airspace at 500' and above is navigable airspace according to the FAA (Congress). There was a court decision that required the military to pay a farmer compensation for flights that were 83' above his property.
United States v. Causby, 328 U.S. 256 (1946)
That say there was no clear defining of where private property rights ended...
"The Court of Claims granted respondents a judgment for the value of property destroyed and damage to their property resulting from the taking of an easement over their property by low-flying military aircraft of the United States, but failed to include in its findings of fact a specific description of the nature or duration of the easement."