Columbia County, GA Building Setbacks & Zoning: Setback Rules (2026)

Code of Ordinances § 90-53 fixes minimum building setbacks for every residential zoning district, measured from the street centerline in front and from the property line on the sides and rear. Front setbacks vary by street classification: on an arterial street the minimum runs from 125 feet in the R-A district down to 105 feet in R-3 and R-3A; on a collector street it runs from 90 feet in R-A down to 70 feet in the denser districts; and on a local or land-service street it runs from 75 feet in R-A down to 45 feet in the T-R district. A separate, tighter 20-to-25-foot minimum applies to setbacks measured from a service drive rather than a public street.

Rear building setbacks range from 40 feet in the T-R, A-R and A-R10 districts down to just 10 feet in R-2, R-3, R-3A and R-4, while side setbacks follow the same pattern: 40 feet in T-R, A-R and A-R10, and 10 feet everywhere else including R-A itself. A separate 25-foot setback from any property line applies specifically to a barn or stable used to house livestock in most districts. Section 90-144(a) ties these numbers together, directing that every principal building on a lot must sit back from the street centerlines and from the front, side and rear lot lines by no less than the § 90-53 figures for residential districts, or the § 90-98 figures for other zoning districts. The planning commission may reduce the minimum lot frontage, and by extension the setback geometry, on radial lots by up to one-third, or further with the county engineer's recommendation, but never below a 40-foot minimum frontage.