ADUs are allowed in Demarest BoroughTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Demarest Borough, NJ
Is your property eligible for an ADU?
# of Properties
91
Owner-occupied
33%
Zoning districts
13
Avg Home Value
$1,827,676
Median Lot Size
0.57 acres
Avg Income
$182,799
Residential Types:
91 housing units
Single Family
24%
Apts (4+ units)
11%
Condos
65%
Zoning Districts:
2,002 parcels · 13 districts
R-D
54%(1,072)
R-C
16%(330)
R-B
11%(213)
R-A
8%(160)
Other
11%(227)
ADU Rules
What can you build in Demarest Borough, NJ?
Demarest Borough, 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: By Right
Interior / Attached ADU Size Limits
- –Maximum size is the gross floor area of the existing principal dwelling.
Detached ADU Size Limits
- –Maximum backyard cottage size cannot exceed the gross floor area of the existing principal dwelling.
Owner Occupancy
- –Owner-occupancy is not required.
Parking
- –4 spaces total (2 per unit); driveway may substitute for a space; must show parking for both units.
Rental Restrictions
- –Must be rented only to low- or moderate-income households for at least 10 years; deed restriction runs with the land; rents capped as affordable under UHAC/COAH; written lease required; affordability controls persist even if subleased, sold, or foreclosed.
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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