ADUs are allowed in AlpharettaTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Alpharetta, GA
Is your property eligible for an ADU?
# of Properties
21,802
Owner-occupied
78%
Zoning districts
34
Avg Home Value
$759,400
Median Lot Size
0.29 acres
Avg Income
$170,063
Residential Types:
21,802 housing units
Single Family
91%
2-3 Family
2%
Apts (4+ units)
2%
Other
5%
Zoning Districts:
23,534 parcels · 34 districts
CUP
38%(8,847)
R-15
20%(4,766)
R-12
7%(1,622)
R-10M
5%(1,249)
Other
30%(7,050)
ADU Rules
What can you build in Alpharetta, GA?
Alpharetta, 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
Detached ADU Size Limits
- –In Downtown Overlay districts, a detached ADU (Carriage House) is limited to 700 sq ft of dwelling floor area, excluding any garage.
Max Units
- –1 Carriage House (ADU) per lot
Rental Restrictions
- –Short-term rentals prohibited in Downtown Alpharetta DT-C/DT-MU/DT-LW/DT-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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Is your property eligible for an ADU?
ADU rules in other Georgia municipalities
Rules change at the town line. Check the municipality your property is actually in.
Fulton County