ADUs in Atlanta · Backyard homes, Atlanta roots
A little more space.
A lot more possibility.
Your guide to building an ADU in Atlanta: the zoning rules, real costs and permits, plus a free lot check from a project manager with 10 completed Atlanta ADUs in the last year.
Find your fit
More than a backyard building.
Start with how you want to live. Then find the kind of space that fits your property, your budget and the rules where you live.
A home of their own. Close to yours.
A detached ADU of up to 750 sq ft can house a parent, an adult child or a long-term tenant on R-4, R-4A and R-5 lots.
Detached ADUs in Atlanta → 02 / Convert existing spaceSee familiar space in a new way.
A detached garage or a basement can be a head start. Structure, utilities and zoning decide what it can become.
Garage & basement conversions → 03 / Add or remodelLove your home. Make it work better.
An addition or in-law suite can work when a separate backyard home doesn't fit the lot or the rules.
Talk through an addition →Know your lot before you fall in love
Your address is the starting point.
In the City of Atlanta, a detached ADU is allowed by right on lots zoned R-4, R-4A and R-5, which cover most intown neighborhoods. It can be up to 750 sq ft and 20 ft tall. Setbacks are 4 ft in R-5, and 7 ft side and 15 ft rear in R-4.
- 01Confirm jurisdiction & zoning
Look up your parcel on the city's property map. Decatur, DeKalb, Fulton and the suburbs each have their own rules.
- 02Map the buildable area
Setbacks, lot coverage, easements, trees, drainage and access shape where an ADU can sit.
- 03Check the practical details
Sewer and water connections, power, site access and budget, before you pay for full plans.
Make room in the budget
Start with a range. Build a clearer plan.
Every lot is different, so a real number comes from a site visit. Our cost guide walks through what drives the price of an Atlanta ADU, including the city's permit and impact fees, and the calculator lets you test your own assumptions.
Meet your project contact
From the first idea to the details that matter.
As a project manager at Park Atlanta Homes, Christina has project-managed 10 completed ADU builds in Atlanta in the last year. She also offers design services. Talk through your goals, layout ideas and budget with someone who knows the work behind a backyard home.
See one in person
Don't just imagine an ADU. Step inside one.
Schedule a viewing of a completed ADU Christina managed from foundation to finish. Walk the rooms, look at the materials and ask questions about your own project. Viewings are by appointment, and references from past clients are available on request.
Schedule a viewingPlain-English guides
Everything you'll want to know first.
Where we focus
Atlanta is not one rulebook.
Intown neighborhoods follow City of Atlanta zoning. Surrounding cities and counties write their own. Tell us where your property is and we'll start with the right rules.
Common questions
Before you get started.
What is an ADU?
An accessory dwelling unit is a smaller, independent home on the same lot as a main house, with its own kitchen, bathroom and entrance. People also call it a backyard cottage, guest house, carriage house, granny flat or in-law suite. A backyard office without a kitchen and bath is a different, simpler project.
Can I build an ADU in the City of Atlanta?
If your lot is zoned R-4, R-4A or R-5, the code allows one detached ADU of up to 750 square feet by right, subject to setbacks, height and lot coverage. Lots zoned R-1, R-2 or R-3 do not allow one today. Our Atlanta ADU rules guide explains each district.
How do I find my zoning?
Search your address on the City of Atlanta Property Information map. It shows the zoning district for the parcel. An Atlanta mailing address does not always mean City of Atlanta rules apply, so check the jurisdiction too.
Is a tiny home the same thing as an ADU?
Not necessarily. "Tiny home" describes size and style. An ADU is a permitted second dwelling on a permanent foundation with real utility connections. A home on wheels should not be assumed to qualify.
Should I compare prefab and site-built options?
Yes. Compare complete installed scopes: foundation, delivery, crane access, utilities, site work, design, permits and finishes. A unit-only advertised price is not a complete project budget.
Can I see a finished ADU or talk to past clients?
Yes. You can schedule a viewing of a completed ADU, and Christina can put you in touch with past clients as references.
Does Atlanta ADU Guide build homes?
No. Atlanta ADU Guide is an information and inquiry service. Project inquiries go to Christina, a project manager at Park Atlanta Homes. Any construction scope, price and contract are confirmed separately with the contractor.
Free, no-pressure first step
Wondering what your lot can hold?
Send Christina your address and your idea. She will look at the zoning, the setbacks and the practical details, then tell you what looks possible.