ADU Rules: Atlanta vs Roswell
How do adu rules rules compare between Atlanta, GA and Roswell, GA?
Atlanta and Roswell have similar restriction levels.
Atlanta, GA
Fulton County
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.
View full Atlanta rules →Roswell, GA
Fulton County
Roswell's Unified Development Code allows accessory dwelling units (ADUs) in limited residential zoning districts subject to size caps, owner-occupancy of the primary unit, and architectural-review standards. Garage conversions and second-floor apartments above garages are the most common forms.
View full Roswell rules →Key Facts Comparison
| Fact | Atlanta | Roswell |
|---|---|---|
| Max Size (Detached) | 750 sq ft or 50% of main | - |
| Height | ~20 ft / 1.5 stories | - |
| Side/Rear Setback | ~7 ft | - |
| Utilities | Shared with main home | - |
| STR Use | Requires STR license | Prohibited - residential STR ban applies |
| Authority | - | Roswell UDC residential districts |
| Typical Size Cap | - | 25% of primary residence |
| Owner Occupancy | - | Generally required |
| Permit | - | Building permit + architectural review |
Highlighted rows indicate differences between cities.
Atlanta FAQ
Roswell FAQ
Can I build an ADU in my Roswell backyard?
Only if the property's zoning district permits ADUs. Check the UDC's residential district article (Art. 3) or contact Community Development to confirm your zoning allows them.
Can I Airbnb my Roswell ADU?
No. The 2024 STR ordinance prohibits short-term rentals in residential zoning districts, which is where ADUs are allowed. ADUs must be owner-occupied or used as long-term rentals.
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