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ADUs are allowed in Douglass Township (Montgomery)
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Accessory Dwelling Unit (ADU) Rules for Douglass Township (Montgomery), PA

Is your property eligible for an ADU?

# of Properties
3,753
Owner-occupied
91%
Zoning districts
17
Avg Home Value
$147,248
Median Lot Size
0.46 acres
Avg Income
$124,250
Residential Types:
3,753 housing units
Single Family
97%
2-3 Family
1%
Apts (4+ units)
2%
Other
1%
Zoning Districts:
4,598 parcels · 17 districts
R-2
43%(1,992)
R-A
24%(1,090)
R-3
14%(630)
R-1
10%(470)
Other
9%(416)

ADU Rules

What can you build in Douglass Township (Montgomery), PA?

Douglass Township (Montgomery), PA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.

Interior / Attached ADU Size Limits

  • Maximum size of 1,200 sq ft for an internal in-home apartment
  • Maximum size of 40% of the primary residence’s living area for an internal in-home apartment

Owner Occupancy

  • Owner of record must occupy either the principal dwelling or ADU

Parking

  • 2 spaces/ADU; must share driveway with the primary residence; must meet underlying zoning district standards and Article XXV, Off-Street Parking.

Rental Restrictions

  • Renting to unrelated tenants prohibited; ADU must be owner-occupied or occupied by an immediate family member; permit valid only while either unit is owner-occupied.

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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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.

Montgomery County