ADUs are allowed in WestfieldTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Westfield, NJ
Is your property eligible for an ADU?
# of Properties
9,810
Owner-occupied
87%
Zoning districts
34
Avg Home Value
$893,211
Median Lot Size
0.23 acres
Avg Income
$214,958
Residential Types:
9,810 housing units
Single Family
4%
Apts (4+ units)
4%
Other
91%
Zoning Districts:
10,136 parcels · 34 districts
RS-6
26%(2,682)
RS-8
18%(1,786)
RS-12
17%(1,738)
RS-10
16%(1,593)
Other
23%(2,337)
ADU Rules
What can you build in Westfield, NJ?
Westfield, NJ follows state and local rules for Accessory Dwelling Units. Here is a concise overview of the local rules.
Eligibility
- –Internal / Attached ADU: Conditional Use Permit
- –Detached ADU: Conditional Use Permit
Detached ADU Size Limits
- –Detached ADUs are prohibited townwide; maximum building area is 0 sq ft.
Rental Restrictions
- –No part of any stand-alone accessory building or structure shall be used for living purposes.
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.
Union County