ADUs are allowed in Alpine BoroughTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Alpine Borough, NJ
Is your property eligible for an ADU?
# of Properties
130
Owner-occupied
6%
Zoning districts
15
Avg Home Value
$11,322,576
Median Lot Size
2.00 acres
Avg Income
$233,804
Residential Types:
130 housing units
Single Family
40%
Apts (4+ units)
12%
Condos
48%
Zoning Districts:
807 parcels · 15 districts
R-1
33%(263)
R-A
22%(178)
R-R
8%(67)
R-A-A
8%(63)
Other
29%(236)
ADU Rules
What can you build in Alpine Borough, NJ?
Alpine 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 ADU size: lesser of 1,000 sq ft or the primary dwelling's habitable floor area
Detached ADU Size Limits
- –Maximum ADU size: 1,000 sq ft
- –Maximum ADU size: not to exceed primary dwelling's habitable gross floor area
Max Units
- –Single-family detached lots: 1 accessory apartment per lot. By ADU type: 1 total ADU (internal/attached or detached) per lot.
Parking
- –2 spaces/ADU; general off-street parking applies; no ADU-specific reductions or waivers
Rental Restrictions
- –ADU must be an affordable rental unit (not owner-occupied).
- –No more than two unrelated persons may occupy a rented unit.
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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