Macon-Bibb County, GA Building Setbacks & Zoning: Lot Coverage Limits (2026)

The Comprehensive Land Development Resolution, not the general county code, fixes lot coverage: Chapter 9 governs the R-1AA, R-1A, and R-1 single-family districts that cover most of the county's older residential neighborhoods. 04, "Lot area requirements for all uses except two-family dwellings," lists maximum lot coverage of 35 percent in R-1, 25 percent in R-1A, and 25 percent in R-1AA, alongside minimum lot area and lot width figures that vary by whether the parcel uses septic and well, septic only, or public sewer. 05 applies the identical 35 percent (R-1) and 25 percent (R-1A) coverage caps to two-family dwellings (duplexes), which are not permitted at all in R-1AA under that section.

02[2] of the same Resolution requires every lot to conform to the area requirements of the zoning district in which it sits, and a building or zoning compliance certificate from the zoning enforcement officer, the executive director of the Macon-Bibb County Planning and Zoning Commission or a designee, is the mechanism that checks a proposed structure's footprint against these percentages before construction begins. Because the caps are tied to the district letter suffix (R-1, R-1A, R-1AA) rather than to a countywide flat number, a homeowner has to confirm the parcel's specific zoning classification before assuming which percentage applies; the more restrictive 25 percent cap governs the R-1A and R-1AA districts that make up much of the county's post-1950s subdivisions, while the original R-1 district allows the higher 35 percent.