ADUs are allowed in Unincorporated DeKalbTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Unincorporated DeKalb, GA
Is your property eligible for an ADU?
# of Properties
15,764
Owner-occupied
59%
Zoning districts
68
Avg Home Value
$709,237
Median Lot Size
0.21 acres
Avg Income
$104,469
Residential Types:
15,764 housing units
Single Family
57%
Other
43%
Zoning Districts:
142,022 parcels · 68 districts
R-100
27%(37,892)
R-75
27%(37,816)
RSM
20%(27,698)
R-85
8%(11,472)
Other
19%(27,144)
ADU Rules
What can you build in Unincorporated DeKalb, GA?
Unincorporated DeKalb, 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 900 sq ft of heated floor area for attached or internal ADUs (garage excluded).
Detached ADU Size Limits
- –Maximum size of 900 sq ft of heated floor area for a detached accessory dwelling unit
Max Units
- –Single-family lots: 1 ADU per lot (any type).
- –Duplex/two-family & multifamily: 0 ADUs.
- –Cottage developments: 0 ADUs.
Owner Occupancy
- –Owner must occupy either the principal or ADU
Parking
- –1 paved off-street space per ADU; no maximum; no transit-based waivers; on-street parking credits not acceptable
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
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