ADUs are allowed in Hummelstown Borough (Dauphin)Types:Internal
Types:Internal
Accessory Dwelling Unit (ADU) Rules for Hummelstown Borough (Dauphin), PA
Is your property eligible for an ADU?
# of Parcels
1,699
Zoning districts
11
Median Parcel Size
0.18 acres
Zoning Districts:
1,699 parcels · 11 districts
R-SF
65%(1,107)
C-RN
16%(267)
R-TF
7%(111)
C-CBD
4%(66)
Other
9%(148)
ADU Rules
What can you build in Hummelstown Borough (Dauphin), PA?
Hummelstown Borough (Dauphin), 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: Not permitted
Interior / Attached ADU Size Limits
- –Maximum size of 800 sq ft
- –Maximum size of 30% of the structure’s total floor area
Max Units
- –1 accessory apartment per single-family detached dwelling unit
Owner Occupancy
- –Owners must occupy one dwelling unit on the premises
Parking
- –3 off-street spaces per lot for an accessory apartment; borough-wide standards apply, and single- and two-family parking must be on the same lot and may back onto public streets.
Rental Restrictions
- –Short-term rentals for ADUs prohibited; STRs limited to single-family detached dwellings
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.
Dauphin County
Derry Township (Dauphin)East Hanover Township (Dauphin)Gratz Borough (Dauphin)Harrisburg City (Dauphin)Highspire Borough (Dauphin)Londonderry Township (Dauphin)Lower Paxton Township (Dauphin)Lower Swatara Township (Dauphin)Middle Paxton Township (Dauphin)Royalton Borough (Dauphin)South Hanover Township (Dauphin)Susquehanna Township (Dauphin)Swatara Township (Dauphin)Unincorporated DauphinWashington Township (Dauphin)West Hanover Township (Dauphin)