ADU rules for Plainsboro Township
Accessory Dwelling Unit (ADU) Rules for Plainsboro Township, NJ
Is your property eligible for an ADU?
# of Properties
3,775
Owner-occupied
90%
Zoning districts
29
Avg Home Value
$1,103,862
Median Lot Size
0.28 acres
Avg Income
$201,444
Residential Types:
3,775 housing units
Single Family
3%
2-3 Family
95%
Apts (4+ units)
2%
Zoning Districts:
6,146 parcels · 29 districts
PCD
39%(2,368)
PMUD
17%(1,022)
R-200
8%(466)
R-300
7%(436)
Other
30%(1,854)
ADU Rules
What can you build in Plainsboro Township, NJ?
Plainsboro Township, 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
Parking
- –1 space/ADU; RSIS governs Dwellings (no fixed local max); EVSE/make-ready credit counts as 2 toward minimum and may reduce total by up to 10%; single-family parking must be in an approved garage/driveway (no yard parking); no ADU-specific transit reductions.
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.
Middlesex County
Carteret BoroughCranbury TownshipDunellen BoroughEast Brunswick TownshipEdison TownshipHelmetta BoroughHighland Park BoroughMetuchen BoroughMiddlesex BoroughMilltown BoroughMonroe Township (Middlesex)New BrunswickNorth Brunswick TownshipOld Bridge TownshipPerth AmboyPiscataway TownshipSayreville BoroughSouth AmboySouth Brunswick TownshipSouth Plainfield BoroughSouth River BoroughSpotswood BoroughWoodbridge Township