ADUs are allowed in LithoniaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Lithonia, GA
Is your property eligible for an ADU?
# of Properties
1
Zoning districts
16
Zoning Districts:
788 parcels · 16 districts
R60
59%(461)
RA5
16%(124)
EG
12%(93)
DT
3%(27)
Other
11%(83)
ADU Rules
What can you build in Lithonia, GA?
Lithonia, 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 ADU total floor area (heated + unheated) equal to the principal dwelling’s heated floor area.
Detached ADU Size Limits
- –Maximum ADU total floor area (heated + unheated) limited to the principal dwelling's heated floor area.
Max Units
- –1 ADU per single-family lot (attached or detached)
- –Duplex and multifamily: none specified
Parking
- –1 space/ADU (in addition to the 4 spaces for the principal dwelling); no max; ADUs existing before adoption exempt; front-yard restrictions and paved-surface parking apply in R districts
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