Atlanta allows ADUs in residential zones with reasonable regulations. The city's rapid growth and housing demand have made it increasingly supportive of infill development and accessory units.
Zoning & Size Requirements
| Allowed Zones | Single-family residential zones |
| Max Size (Detached) | 850 sq ft |
| Max Size (Attached) | 700 sq ft |
| Max Size (JADU) | Not allowed |
| Max Height | 35 feet |
| Max Units | 1 ADU per lot |
Setback Requirements
| Rear Setback | 15 feet |
| Side Setback | 5 feet |
| Front Setback | 20 feet |
| Parking Required | 1 space per unit |
| Owner Occupancy | Not required |
| Min Lot Size | 5,000 sq ft |
Permit Process & Fees
| Approval Process | Building permit |
| Review Timeline | 55-80 days |
| Permit Fees | $2,400-$4,000 |
| Impact Fees | $900-$1,600 |
| Plan Check | 2-3 weeks |
| Pre-Approved Plans | Limited availability |
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Construction Costs
| Average Build Cost | $120,000-$240,000 |
| Cost per Sq Ft | $140-$280 |
| Garage Conversion | $60,000-$140,000 |
| Prefab ADU (Installed) | $85,000-$190,000 (installed) |
Finance Your ADU Project
Most ADU projects are funded through HELOCs, construction loans, or cash-out refinancing. Compare rates from top lenders in minutes.
Compare ADU Financing Options →Rental Income Potential
| Avg Rent (1 Bedroom) | $1,300-$1,750/mo |
| Avg Rent (2 Bedroom) | $1,650-$2,300/mo |
| Short-Term Rental | Restricted in some zones |
| Est. Annual ROI | 7-9% annual return |
Explore Prefab ADU Options
Prefab ADUs can save 20-40% vs. traditional construction and cut build time in half. Compare top prefab manufacturers.
Compare Prefab ADUs →Recent Law Changes
What's Changed Recently
- 2024: Expanded ADU provisions in residential zones
- 2023: Streamlined permitting process
- 2024: Increased max detached ADU size from 750 to 850 sq ft
- 2023: Created ADU design guidelines
Tips for Building an ADU in Atlanta
- Atlanta's booming tech and corporate sector drives strong rental demand
- Rapid population growth supports property appreciation
- Diverse neighborhoods offer varied investment opportunities
- HOA restrictions common; verify compatibility early
Frequently Asked Questions
Can I build an ADU in Atlanta?
Yes. ADUs are allowed in Single-family residential zones in Atlanta. The maximum size for a detached ADU is 850 sq ft. No owner-occupancy is required.
How much does an ADU cost in Atlanta?
ADU construction in Atlanta typically costs $120,000-$240,000. Garage conversions run $60,000-$140,000, and prefab ADUs cost $85,000-$190,000 (installed).
How much can I rent an ADU for in Atlanta?
Average ADU rents in Atlanta are $1,300-$1,750/mo for a 1-bedroom and $1,650-$2,300/mo for a 2-bedroom unit.
Do I need parking for an ADU in Atlanta?
1 space per unit. Check with Atlanta planning department for the latest Georgia ADU parking rules, as many states have relaxed requirements in recent years.
How long does it take to get an ADU permit in Atlanta?
The permit review timeline in Atlanta is 55-80 days. Fees range from $2,400-$4,000.
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