Columbia County, FL Accessory Structures: Shed & Carport Rules (2026)

Section 4.2.4 of the Land Development Regulations governs where a shed, workshop, or other accessory structure can go on a lot in unincorporated Columbia County. The rule bars accessory uses and structures from required front, side, or waterfront yards, but allows them in a rear yard as close as ten feet from the rear lot line. A separate sentence in the same section adds a building-to-building buffer: no accessory building may sit within five feet of any other building on the property. Two carve-outs modify the baseline.

Structures built to house people, such as guest houses, are barred from any required yard outright, as are air conditioner compressor units. On waterfront lots, water-related accessory uses such as boat docks and boathouses may be placed anywhere within the required waterfront yard, an exception the principal-structure waterfront setback rule in section 4.2.27 expressly cross-references. That companion section sets the waterfront yard itself at 75 feet from the Ichetucknee River, Olustee Creek, Santa Fe River, and Suwannee River banks, and 50 feet from the mean high water line elsewhere in the county, so a shed built near a river channel has to clear both the waterfront setback and the rear/side placement rule unless it qualifies as a dock or boathouse.

Building permits for accessory structures run through the county Building and Zoning Department under the Florida Building Code administration provisions in chapter 26 of the Code of Ordinances, and code enforcement for placement violations proceeds through the county's special magistrate process rather than criminal court.