Permit Required? Required
Typical Fee Range $1,000–$5,000 Includes building, zoning, and separate trade permits; impact fees may also apply.
Fee Method Valuation-based
Apply Online Apply at City of Atlanta Department of City Planning, Office of Buildings →

What's Required in Atlanta

  • ADUs are allowed 'by right' in zones R-4, R-4A, and R-5
  • Maximum size for a detached ADU is 750 heated square feet
  • Maximum height is capped at 20 feet
  • Combined lot coverage for main house and ADU cannot exceed 50–55%
  • Independent cooking and bathroom facilities must be included
  • No additional off-street parking is required for detached ADUs in Atlanta

How to Get a ADU Permit in Atlanta

1

Step 1: Zoning Verification

Confirm your lot allows ADUs and identify setback requirements (e.g., 4' rear for R-5).

2

Step 2: Professional Plans

Secure IRC-compliant architectural and structural plans.

3

Step 3: Portal Submission

Submit a 'New Residential Construction' application via the Accela portal.

4

Step 4: Fee Payment

Pay valuation-based building and zoning fees online.

5

Step 5: Full Inspections

Schedule the complete series: Foundation, Framing, Rough MEP, and Final.

Frequently Asked Questions

Yes, they are allowed by right on most residential lots in R-4, R-4A, and R-5 zones.
Permit fees start around $1,000 for building and utility permits.
Detached ADUs are limited to a maximum of 750 heated square feet.