ADU rules for Upper St Clair Township (Allegheny)
Accessory Dwelling Unit (ADU) Rules for Upper St Clair Township (Allegheny), PA
Is your property eligible for an ADU?
# of Properties
7,577
Owner-occupied
90%
Zoning districts
21
Avg Home Value
$284,229
Median Lot Size
0.36 acres
Avg Income
$168,704
Residential Types:
7,577 housing units
Single Family
93%
Condos
2%
Other
5%
Zoning Districts:
7,843 parcels · 21 districts
R-1
71%(5,585)
PRD/R-1
9%(708)
R-2
7%(575)
R-3
5%(417)
Other
7%(558)
ADU Rules
What can you build in Upper St Clair Township (Allegheny), PA?
Upper St Clair Township (Allegheny), PA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Not addressed in the local bylaw
- –Detached ADU: Not addressed in the local bylaw
ADU State Law
What can you build in Pennsylvania?
- –Pennsylvania 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 Pennsylvania municipalities
Rules change at the town line. Check the municipality your property is actually in.
Allegheny County
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