ADU rules for Frenchtown Borough
Accessory Dwelling Unit (ADU) Rules for Frenchtown Borough, NJ
Is your property eligible for an ADU?
# of Properties
496
Owner-occupied
67%
Zoning districts
15
Avg Home Value
$414,257
Median Lot Size
0.26 acres
Avg Income
$97,917
Residential Types:
496 housing units
Single Family
1%
Condos
8%
Other
92%
Zoning Districts:
581 parcels · 15 districts
R-2
40%(232)
R-1
36%(210)
R-4A
13%(74)
R-7
5%(30)
Other
6%(35)
ADU Rules
What can you build in Frenchtown Borough, NJ?
Frenchtown Borough, NJ 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
Max Units
- –Detached ADU: 0 per lot
Parking
- –RSIS governs ADU parking; min/max not stated. In Frenchtown's R-2, RSIS applies to new construction on vacant lots and conversions of single-family to two-family; subdivisions or additions on lots with existing dwellings may not reduce parking below RSIS. For counting: a 1-car garage + 18-foot driveway = 2 spaces; a 2-car garage + a 20-foot-wide, 18-foot-long driveway = 3.5 spaces. All parking on the same lot; no front-yard parking; accessible parking must meet codes.
ADU State Law
What can you build in New Jersey?
- –New Jersey 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 New Jersey municipalities
Rules change at the town line. Check the municipality your property is actually in.
Hunterdon County
Alexandria TownshipBethlehem TownshipBloomsbury BoroughCalifon BoroughClintonDelaware TownshipEast Amwell TownshipFlemington BoroughFranklin Township (Hunterdon)Glen Gardner BoroughHampton BoroughHigh Bridge BoroughHolland TownshipKingwood TownshipLambertvilleLebanon BoroughMilford BoroughReadington TownshipTewksbury TownshipUnion Township (Hunterdon)West Amwell Township