ADUs are allowed in Unincorporated DecaturTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated Decatur, GA
Is your property eligible for an ADU?
# of Properties
7,718
Owner-occupied
63%
Zoning districts
10
Median Lot Size
1.26 acres
Avg Income
$60,334
Residential Types:
7,718 housing units
Residential
100%
Zoning Districts:
10,934 parcels · 10 districts
NZ
99%(10,790)
SR-3
1%(107)
PUD
0%(13)
HI
0%(12)
Other
0%(12)
ADU Rules
What can you build in Unincorporated Decatur, GA?
Unincorporated Decatur, 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 size of 800 sq ft
- –Maximum size of 40% of the principal dwelling’s floor area
Detached ADU Size Limits
- –Maximum ADU size of 800 sq ft
- –Maximum ADU size of 40% of the principal dwelling’s floor area
Max Units
- –1 ADU per lot.
- –Allowed only with single-family, duplex, or walk-up flat (3-4 units); other structures: not permitted.
Owner Occupancy
- –Owner must occupy either the principal dwelling or the ADU
Parking
- –1 space/ADU; Downtown Decatur Parking District max 2 spaces/ADU; on-street parking may count toward up to 50% of off-street requirement for certain duplex/walk-up flats; ADU attached to a 4-unit walk-up flat cannot use inclusionary parking reductions.
Rental Restrictions
- –Owner-occupied ADU cannot be rented (owner must occupy 8+ months/year).
- –STRs allowed with permit; max one STR unit per building.
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.
Decatur County