ADUs are allowed in Stone MountainTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Stone Mountain, GA
Is your property eligible for an ADU?
# of Parcels
2,373
Zoning districts
17
Avg Parcel Value
$259,609
Zoning Districts:
2,491 parcels · 17 districts
R-1
50%(1,246)
R-2
19%(483)
R-4
8%(189)
MR-1
7%(167)
Other
16%(406)
ADU Rules
What can you build in Stone Mountain, GA?
Stone Mountain, GA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: By Right
- –Detached ADU: By Right
Interior / Attached ADU Size Limits
- –Maximum internal accessory dwelling unit (in-home apartment) size is 400 sq ft citywide; special approvals do not increase this cap.
Detached ADU Size Limits
- –Maximum size for a detached accessory dwelling unit (backyard cottage) is 400 sq ft (zones other than R-2 and R-3).
- –In R-2 and R-3 districts, detached ADUs require a Special Use Permit; maximum size remains 400 sq ft.
Max Units
- –1 ADU per lot (citywide; R-3 also 1 per lot)
Owner Occupancy
- –Owner must occupy the primary residence during ADU use
Parking
- –1 space/ADU (in addition to any for the primary residence); waivers/reductions allowed in districts other than R-1/R-2 via shared/reduced parking; prohibited in R-1 and R-2
Rental Restrictions
- –ADU rentals are allowed only by special use and only if the primary residence is not rented; short-term rentals must comply with separate short-term lodging regulations.
ADU State Law
What can you build in Georgia?
- –Georgia does not have a statewide ADU mandate; ADU rules are set by individual municipalities.
- –Building/fire codes are set statewide, but whether an ADU is allowed is local zoning.
What's allowed on your lot?
These are the municipality-wide rules. What's allowed on a specific property also depends on state laws, setbacks, floor area ratio, lot coverage, environmental constraints, topography, and other property-specific factors. Search your address on FutureLot to see what's allowed on your property.
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ADU rules in other Georgia municipalities
Rules change at the town line. Check the municipality your property is actually in.
DeKalb County