ADU rules in Cobb County, GA — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Cobb County (unincorporated) does NOT have an approved ADU ordinance as of 2025 — a 2024 draft was withdrawn by Board of Commissioners. Interior conversions allowed under existing residential building rules.
As of 2025, Cobb County's unincorporated areas do not have an approved countywide ADU ordinance. A 2024 draft ordinance that would have permitted detached backyard ADUs was withdrawn by the Board of Commissioners after public hearings. The proposed rules would have limited ADUs to 50% of the primary unit's square footage or 850 square feet (whichever is less), required one-story construction, provided one off-street parking space, connected utilities to the primary structure's meters, and prohibited use as a short-term rental. Interior conversions (finished basements, in-law suites attached to the primary structure) are allowed under existing residential building permits. Contact Cobb County Zoning (770-528-2035) for any updates.
Unpermitted ADU: $500 to $2,000. May require demolition or retroactive permitting. Zoning violation: $250/day.
Cobb County, GA
Cobb County §50-257 — keeping any animal that by frequent or long-continued noise disturbs comfort or repose of persons in the vicinity is a violation. Cobb ...
Cobb County, GA
Cobb County Ch. 50, Art. VII — construction noise subject to 70 dB daytime limit. Sunday construction permitted 9 AM–6:59 PM (2023 amendment). Residential pr...
Cobb County, GA
Cobb County quiet hours are 11 PM–7 AM (Code §50-256/50-257). Daytime noise limit 70 dB, nighttime 65 dB (2023 amendment). Any unreasonable noise plainly aud...
Cobb County, GA
Cobb County regulates amplified music under the general noise ordinance. Sound permits available for events. O.C.G.A. §16-11-39 applies to unreasonable distu...
Cobb County, GA
Cobb County Zoning Ch. 134 — in R-40, R-80, RR zones, combinations of boats/RVs exceeding 3 must be screened from public roadways. Outside storage generally ...
Cobb County, GA
Cobb County Ch. 134 — only 1 business vehicle (resident's use only) may park on residential premises. No materials or equipment storage. Off-site employees m...
See how Cobb County's adu rules rules stack up against other locations.
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