Accessory Dwelling Units (ADUs) have become an increasingly popular solution for homeowners looking to maximize their property’s potential. In Atlanta, the addition of an ADU offers opportunities for rental income, housing family members, or creating a dedicated workspace. However, it's crucial to navigate the city's specific regulations and requirements to ensure your ADU is compliant and functional.

An ADU is a secondary housing unit on a single-family residential lot. It is a self-contained living space with its own kitchen, bathroom, and sleeping area, either attached to or separate from the primary residence. In Atlanta, an ADU is defined as:

Before planning your ADU, it's essential to verify that your property is zoned to permit such a structure. In Atlanta, ADUs are allowed in the following zoning districts:

• R-4
• R-4A
• R-5
• SPI-3
• SPI-4
• SPI-19 (specific subareas)

Special Public Interest (SPI) and certain Historic Districts may have additional design controls and requirements. It's advisable to consult the City of Atlanta's Zoning Ordinance and use the city's Research Tool to confirm your property's zoning classification.

When designing and constructing an ADU in Atlanta, consider the following critical factors:

• The ADU must not exceed 750 square feet or the maximum floor area ratio allowed for the lot, whichever is less.
• All spaces under the roof count towards the total floor area, including non-conditioned or non-habitable spaces, except for porches and decks.

• The ADU should not surpass an average building height of 20 feet. Ensure this is reflected accurately in your design plans.

• A full kitchen with a permanent cooking element (e.g., stove, range, oven) is required. This must be clearly indicated in the submitted plans.

• All sleeping rooms must have egress windows or doors.
• Install smoke detectors in sleeping rooms and hallways.
• Place carbon monoxide detectors on each floor and in hallways adjacent to sleeping areas.

To obtain a permit for your ADU, follow these steps:

1. Site Plan Submission
   • Provide a detailed site plan or a signed, sealed survey showing the location of the primary structure and the proposed ADU on the lot.
     
     
2. Prepare Detailed Drawings
   • Coversheet: Include the scope of work, project team contacts, heated/unheated square footage, applicable codes, address, and design criteria.
     
     
   • Floor Plans: Scaled and dimensioned plans for each floor, labeling all rooms and exterior spaces.
     
     
   • Building and Wall Sections: Illustrate the building envelope, insulation, and structural details from roof to foundation.
     
     
   • Framing and Foundation Plans: Detail floor, ceiling, roof framing, and foundation elements.
     
     
   • Roof Plan: Show roof slope, overhang dimensions, and any features like chimneys or skylights.
     
     
   • Exterior Elevations: Provide views of all sides, indicating materials, window and door types, and finished floor lines.
     
     
   • Stair and Deck Sections: Include detailed drawings of stairs, decks, balconies, or porches, specifying sizes and materials.
     
     
3. Engineering Stamps
   • Obtain a licensed professional engineer's stamp on necessary items, such as trusses, laminated veneer lumber (LVL), retaining walls over 4 feet, pools deeper than 8 feet, second-story additions, and double-story balconies or decks.
     
     
4. Application Submission
   • Submit all required documents through the City of Atlanta's Online Permitting Portal. Ensure all plans are labeled "released for construction" if stamped by a licensed professional.

• Assuming Zoning Compliance: Always confirm your property's zoning before proceeding. Not all areas permit ADUs.
• Incomplete Surveys: If submitting a survey, ensure it is stamped by a licensed professional. Alternatively, a detailed site plan can suffice.
• Unlabeled Plans: Clearly label all interior spaces in your plans to avoid delays in the approval process.

• Increased Property Value: An ADU can enhance your property's marketability and value.
• Additional Income: Renting out the ADU provides a steady income stream.
• Flexible Living Arrangements: Ideal for housing family members or creating a private workspace.

Ensure compliance with local regulations and streamline your project by consulting with a design professional experienced in ADU development. Visit the City of Atlanta's [Zoning, Development, and Permitting Services](https://www.atlantaga.gov/government/departments/city-planning/zoning-development