Garage Conversions: Atlanta vs Roswell
How do garage conversions rules compare between Atlanta, GA and Roswell, GA?
Roswell has fewer restrictions than Atlanta.
Atlanta, GA
Fulton County
Atlanta currently prohibits attached ADUs, so a garage conversion into a separate dwelling is not allowed by-right; converting a garage to additional living space for the primary dwelling requires a building permit from the Office of Buildings under the Georgia State Minimum Standard Residential Code (2018 IRC with GA amendments).
View full Atlanta rules →Roswell, GA
Fulton County
Converting a garage to habitable space (bedroom, office, ADU) in Roswell requires a building permit, must meet residential energy code (insulation, windows, mechanical), and may require additional off-street parking to replace the converted spaces. ADU conversions are subject to the same UDC zoning rules as new ADUs.
View full Roswell rules →Key Facts Comparison
| Fact | Atlanta | Roswell |
|---|---|---|
| Attached ADU Status | Currently prohibited (Part 16) | - |
| Allowed Districts (detached only) | R-4, R-4A, R-5 | - |
| Permit | Building permit, Office of Buildings | Required |
| Building Code | GA State Min. Std. (2018 IRC) - 2024 IRC eff. 1/1/2026 | - |
| Trade Permits | Separate plumbing/electrical/HVAC required | - |
| Pending Reform | ADU code amendment proposal (DCP) | - |
| Egress | - | IRC §R310 required |
| Parking Replacement | - | Often required |
| Energy Code | - | Must meet residential standards |
| ADU Use | - | Subject to UDC ADU rules |
Highlighted rows indicate differences between cities.
Atlanta FAQ
Can I convert my garage into a separate apartment or ADU in Atlanta?
Not under current zoning. Atlanta's Part 16 code currently allows ADUs only as detached structures in R-4, R-4A, and R-5 districts. A Department of City Planning proposal would allow attached ADUs up to 50% of the main house or 1,000 sq ft, but that change has not yet been adopted.
Do I need a permit to turn my garage into a den or bedroom for my own household?
Yes. Any conversion of garage space into conditioned living area for the existing dwelling requires a building permit from the Atlanta Office of Buildings, plus separate trade permits for plumbing, electrical, and HVAC work.
What building code applies to a garage conversion in Atlanta?
The Georgia State Minimum Standard One and Two Family Dwelling Code, currently the 2018 IRC with Georgia amendments. Permits submitted on or after January 1, 2026 will be reviewed under the 2024 IRC with Georgia amendments.
Roswell FAQ
Do I need a permit to convert my garage to a bedroom in Roswell?
Yes. Building permit, electrical permit, and possibly mechanical permit are required. The space must meet residential energy code, egress, and ceiling-height requirements.
Will I lose required parking if I convert my garage?
Possibly. The UDC requires 2 off-street parking spaces per dwelling. If your driveway can accommodate the replacement spaces you may be fine; otherwise you may need to add parking elsewhere on the lot.
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