St. Johns County, FL Noise Ordinances: Aircraft Noise (2026)

Sec. 01 states the Airport Overlay District exists to prevent hazards to aircraft and protect people and property near any public-use airport, implementing FAA and Florida Department of Transportation requirements. Sec. 02 sets the boundary using four maps: the airport property map, the 20-year airport layout plan, the airport noise contour map, and the airspace surfaces map; the district reaches all property within 200 feet outside the 65 db noise contour. Sec. C requires the county to maintain a noise contour map showing, at minimum, the 65 db contour for both existing and future airside facilities, coordinated into the county's zoning maps.

Sec. 04 lets existing uses and zoning remain, but any rezoning inside the district must go to the Airport Authority for a recommendation before the Board of County Commissioners acts, and variance or special-use requests get the same added Airport Authority review before Planning and Zoning. Nonconforming uses may continue and receive minor repairs, but major renovation or replacement must meet current district standards. Sec. 00-foot mean sea level elevation without prior FAA and Airport Authority approval; the Conical Zone height limit rises from 150 feet to 350 feet over its 4,000-foot span, gaining one vertical foot per 20 horizontal feet.