ADUs are allowed in Mahwah TownshipTypes:Internal
Types:Internal
Accessory Dwelling Unit (ADU) Rules for Mahwah Township, NJ
Is your property eligible for an ADU?
# of Properties
964
Owner-occupied
12%
Zoning districts
43
Avg Home Value
$1,628,186
Median Lot Size
0.89 acres
Avg Income
$145,949
Residential Types:
964 housing units
Single Family
30%
Apts (4+ units)
25%
Condos
45%
Zoning Districts:
11,687 parcels · 43 districts
R40
23%(2,638)
ML2
21%(2,457)
PRD6
10%(1,170)
R15
8%(986)
Other
38%(4,436)
ADU Rules
What can you build in Mahwah Township, NJ?
Mahwah Township, NJ 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 ADU size: 800 sq ft
- –Maximum ADU size: 30% of the principal dwelling's habitable living space
Max Units
- –Single-family: 1 internal ADU.
- –Duplex/multifamily: 0 ADUs.
- –Detached ADUs: 0.
Owner Occupancy
- –Owner must occupy the dwelling; owner may occupy the ADU.
Parking
- –No ADU parking minimum/maximum specified; RSIS applies; accessory parking must be on the same lot but may be off-site within 400 ft if under the same ownership and deed restriction.
Rental Restrictions
- –Detached ADU not permitted; cannot be 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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ADU rules in other New Jersey municipalities
Rules change at the town line. Check the municipality your property is actually in.
Bergen County
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