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

Section 90-144(b) sets the setback rule for accessory buildings, including sheds, detached garages and workshops. An accessory building with 400 square feet of floor area or less needs a minimum setback of only five feet from any property line, a lighter standard than what applies to the house itself. Once an accessory building exceeds 400 square feet, though, it loses that break and must comply with the same front, side and rear setbacks required for principal buildings in its zoning district under the § 90-53 lot and structure requirements table, for example a 25-foot rear setback and 10-foot side setback in the R-2, R-3 and R-3A districts, or a 40-foot rear and side setback in the T-R, A-R and A-R10 districts.

Fences and freestanding walls are addressed separately under § 90-144(c)(1) with their own height rules by district and are not part of the shed setback standard. Section 90-144(c)(4) applies the same five-foot minimum to any other accessory structure not specifically listed, such as parking areas, so a detached carport or storage structure gets the same five-foot baseline as a small shed unless it independently exceeds the 400-square-foot threshold. Certain accessory items are exempt from setbacks entirely under § 90-144(d), including surface parking areas, driveways, landscaping and buffer plantings, sidewalks, stormwater facilities, flagpoles and yard ornaments, and satellite dishes one meter or less in diameter.