ADUs are allowed in BirminghamTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Birmingham, AL
Is your property eligible for an ADU?
# of Properties
82,410
Owner-occupied
43%
Zoning districts
242
Avg Home Value
$116,473
Median Lot Size
0.18 acres
Avg Income
$54,950
Residential Types:
82,410 housing units
Other
100%
Zoning Districts:
280,813 parcels · 242 districts
D3
21%(59,347)
R3
21%(58,938)
R-4
4%(12,136)
D2
3%(9,648)
Other
50%(140,744)
ADU Rules
What can you build in Birmingham, AL?
Birmingham, AL 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 cannot exceed the primary dwelling's floor area
Detached ADU Size Limits
- –Maximum ADU size of 800 sq ft
- –Maximum ADU size cannot exceed the size of the primary dwelling
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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Learn the key rules and size limits for ADUs
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ADU rules in other Alabama municipalities
Rules change at the town line. Check the municipality your property is actually in.
Jefferson County
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