ADU rules in Atlanta, GA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Atlanta expanded its ADU rules in 2021 to allow ADUs on most single-family lots. Detached ADUs are capped at 750 sq ft or 50% of the main dwelling's heated area and must share utilities.
Under Atlanta Code §158 (zoning amendments in 2021), accessory dwelling units are permitted in all R-1 through R-5 districts. Detached ADUs may be up to 750 square feet or 50% of the primary dwelling's heated area (whichever is less) and must meet setback requirements for accessory structures: typically 7 feet from side/rear lines and behind the rear wall of the primary home. Height is usually capped at 1.5 stories or 20 feet. The ADU must share water and sewer connections with the primary house, not have its own separate utility accounts. ADUs cannot be used as short-term rentals unless separately licensed and counted against the host's two-property cap. Parking for the ADU is typically not required if within a walkable transit district.
Unpermitted ADUs trigger stop-work orders and may be required to be removed or converted to non-habitable accessory structures.
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Side-by-side rule comparisons with other cities in Fulton County.
See how other cities in Fulton County handle adu rules.
See how Atlanta's adu rules rules stack up against other locations.
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