FutureLot
ADU rules for Gratz Borough (Dauphin)

Accessory Dwelling Unit (ADU) Rules for Gratz Borough (Dauphin), PA

Is your property eligible for an ADU?

# of Parcels
437
Zoning districts
9
Median Parcel Size
0.45 acres
Zoning Districts:
437 parcels · 9 districts
R-1
38%(166)
R-2
19%(84)
B-1
18%(79)
C-1
12%(52)
Other
13%(56)

ADU Rules

What can you build in Gratz Borough (Dauphin), PA?

Gratz Borough (Dauphin), PA follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.

Owner Occupancy

  • Owner-occupancy not required.

Parking

  • 1 space/ADU; exceptions: residents may prove they do not drive; driveways/garages may count toward required spaces

Rental Restrictions

  • General public rentals prohibited; attached ADU limited to family members and at least one resident needing care; must reconvert within 3 months of a family member no longer residing.

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 property

How 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.

Dauphin County

Browse addresses by ZIP in Gratz Borough (Dauphin)