

ADUs are allowed in Penn Township (Westmoreland)Types:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Penn Township (Westmoreland), PA
Is your property eligible for an ADU?
# of Properties
9,182
Owner-occupied
80%
Zoning districts
11
Avg Home Value
$27,188
Median Lot Size
0.36 acres
Avg Income
$118,794
Residential Types:
9,182 housing units
Residential
100%
Zoning Districts:
10,142 parcels · 11 districts
MDR
77%(7,802)
RR
15%(1,567)
CC
4%(432)
IC
2%(177)
Other
2%(164)
ADU Rules
What can you build in Penn Township (Westmoreland), PA?
Penn Township (Westmoreland), PA 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
- –Maximum detached ADU size of 900 sq ft of floor area
Owner Occupancy
- –Owner occupancy not required.
Parking
- –1 off-street space per ADU (in addition to principal dwelling); all-weather space with street ingress/egress; no waivers stated
Rental Restrictions
- –ADU occupancy limited to a qualifying relative; max 2 people, with at least one (50+ or disabled) related to occupants of the principal dwelling.
- –Short-term rentals are prohibited in ADUs; internal/attached ADUs cannot be STRs because the structure contains another dwelling unit.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
Is your property eligible for an ADU?
ADU rules in other Pennsylvania municipalities
Rules change at the town line. Check the municipality your property is actually in.
Westmoreland County