The Ad Coelum Doctrine in Florida
The ad coelum doctrine is the common law principle that land ownership extends from the surface upward to the sky and downward to the center of the earth. While historically significant, modern Florida law has substantially limited this doctrine's application, particularly with respect to airspace rights.
Modern Limitations
The U.S. Supreme Court's decision in United States v. Causby (1946) established that navigable airspace belongs to the public. Florida property owners do not have exclusive rights to airspace above their land at altitudes used by aircraft. However, ownership of the immediate airspace above the surface is still recognized, which is why structures, trees, and billboards on neighboring property can constitute encroachments if they extend over a property line.
Subsurface Rights
The downward extension of the doctrine supports mineral rights and underground resource ownership in Florida. Landowners generally own the subsurface beneath their parcels, including any mineral deposits, groundwater access, and the right to excavate. Florida's phosphate mining industry depends on this principle. Subsurface rights can be severed from surface rights and conveyed separately, creating split estates.
Related Terms
Barnes Walker Real Estate
Barnes Walker advises on property rights, mineral ownership, and airspace issues throughout Southwest Florida. Contact our real estate team for guidance.
Reviewed by the attorneys at Barnes Walker, Goethe, Shea & Robinson, PLLC