ADU rules for Middlesex Borough
Accessory Dwelling Unit (ADU) Rules for Middlesex Borough, NJ
Is your property eligible for an ADU?
# of Properties
4,779
Owner-occupied
78%
Zoning districts
24
Avg Home Value
$494,631
Median Lot Size
0.17 acres
Avg Income
$110,469
Residential Types:
4,779 housing units
Single Family
6%
2-3 Family
87%
Apts (4+ units)
5%
Other
2%
Zoning Districts:
4,996 parcels · 24 districts
R-75
43%(2,152)
R-60A
17%(837)
R-50
8%(420)
R-60B
7%(362)
Other
25%(1,225)
ADU Rules
What can you build in Middlesex Borough, NJ?
Middlesex 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 ADUs: 0 per lot; Attached/internal ADUs and JADUs: none specified
Owner Occupancy
- –No owner-occupancy requirement applies.
Rental Restrictions
- –Detached ADU: no residential use; second dwelling prohibited (max one residential building per lot).
- –Internal/Attached ADU: not permitted; cannot be established or rented.
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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Is your property eligible for an ADU?
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 BoroughMilltown BoroughMonroe Township (Middlesex)New BrunswickNorth Brunswick TownshipOld Bridge TownshipPerth AmboyPiscataway TownshipPlainsboro TownshipSayreville BoroughSouth AmboySouth Brunswick TownshipSouth Plainfield BoroughSouth River BoroughSpotswood BoroughWoodbridge Township