ADU Rules in Atlanta, GA (2026)
ADU rules, permit requirements, size limits, and fees for Atlanta, GA. Source-cited from official municipal code.
Whether ADUs are allowed in Atlanta, GA has not been confirmed — see the official source before proceeding.
Whether Atlanta, GA permits accessory dwelling units (ADUs) has not been confirmed from an official source. ADUs — also called granny flats, in-law units, or secondary suites — are secondary housing units on a single-family or multifamily lot. Contact the local building department at (404) 330-6150 to verify current ADU rules before proceeding, as regulations may have changed since this data was last reviewed.
ADU Size Limits
ADU Size Limits in Atlanta: Detached ADU: size varies by zoning — see official source (max height: varies — see official source). Attached ADU: size varies by zoning — see official source.
| Type | Max Size | Max Height |
|---|---|---|
| Detached ADU | See official source | See official source |
| Attached ADU | See official source | See official source |
Permit Fees
ADU Permit Fees in Atlanta: Plan check fee: Varies. Building permit fee: Varies. Impact fees: None. School fees: None or N/A. Total estimated permit cost: Varies.
| Fee Type | Amount |
|---|---|
| Plan Check | $250–$1,500 |
| Building Permit | Based on construction value — typically $1,000–$4,000 |
| Impact Fees | Atlanta charges impact fees for school, transportation, and parks for new dwelling units |
| School Fees | $500–$3,000 |
| Total Estimate | See official source |
Permit Timeline
Atlanta ADU Permit Timeline: Permit timeline has not been confirmed — contact the department for current processing times. Apply through the local building department online permit portal. Phone: (404) 330-6150.
Setback Requirements
ADU Setback Requirements in Atlanta: Front setback: follows zone standard. Side setback: no minimum. Rear setback: no minimum.
Parking Requirements
Parking Requirements: Parking requirements have not been confirmed — see official source.
Restrictions & Requirements
- ADU must be on same lot as primary dwelling
- Maximum 1 ADU per residential lot
- Maximum size: 750 sqft or 50% of primary dwelling
- Must comply with lot coverage and setback standards for the zone
- ADU cannot be separately sold or conveyed
- Parking requirement: 1 space per ADU
- Primary dwelling must be at least 1,200 sqft to add a detached ADU in some zones
How Many ADUs Are Allowed?
Number of ADUs Allowed in Atlanta: Single-family lots: not confirmed — see official source. Multifamily properties: not confirmed — see official source.
- Single-Family Lots
- 1 ADU per single-family lot
- Multifamily Properties
- Limited ADU allowances in RG zones — check specific zone standards
Statewide Preemption
ADU Preemption
We could not confirm a statewide ADU preemption statute for Georgia.
View Georgia preemption detailsFrequently Asked Questions
Can I build an ADU in Atlanta?
Yes. Atlanta, GA allows accessory dwelling units. On a single-family lot you can build 1 ADU per single-family lot.
How big can an ADU be in Atlanta?
The maximum size for a detached ADU in Atlanta is Not ADU-specific — accessory buildings limited to 30% of main structure floor area in R-1–R-5 districts (§16-28.004(3)); no distinct ADU size cap verified square feet.
How long does it take to get an ADU permit in Atlanta?
The typical ADU permit timeline in Atlanta is Not specified in code — general building permit process applies. Total estimated permit fees are Per council-approved fee schedule — not stated in code.
Do I need extra parking for an ADU in Atlanta?
Atlanta parking rules for ADUs: Zone parking standards apply per §16-28.014 — no ADU-specific waiver found
Do I have to live on-site to have an ADU in Atlanta?
Owner-occupancy requirement in Atlanta: Not established in local ordinance — ADU chapter not found
Source: Atlanta Code of Ordinances Part 16 — Land Development Code; ADU provisions. Last verified April 5, 2026. View source