ADUs are allowed in Denville TownshipTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Denville Township, NJ
Is your property eligible for an ADU?
# of Properties
7,157
Owner-occupied
80%
Zoning districts
33
Avg Home Value
$434,697
Median Lot Size
0.24 acres
Avg Income
$157,081
Residential Types:
7,157 housing units
Other
100%
Zoning Districts:
7,622 parcels · 33 districts
R-1
26%(1,999)
R-3
18%(1,343)
R-4
16%(1,196)
R-2
11%(870)
Other
29%(2,214)
ADU Rules
What can you build in Denville Township, NJ?
Denville Township, 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
Interior / Attached ADU Size Limits
- –Maximum size cannot exceed the principal dwelling’s gross floor area
Detached ADU Size Limits
- –Maximum ADU building area cannot exceed the gross floor area of the existing principal dwelling
Max Units
- –1 accessory apartment per residential lot
Owner Occupancy
- –No owner-occupancy requirement.
Parking
- –No numeric min/max; must show required parking spaces for both dwelling units; affordable ADUs allowed as conditional uses; no replacement numeric standard.
Rental Restrictions
- –Must be rented to very-low/low/moderate-income households for at least 10 years; rents set and adjusted by Administrative Agent per FHA/COAH/UHAC.
- –Recorded deed restrictions limit rental/sale; written leases required for restricted units; affordability controls remain; application fees capped at 5% of monthly rent.
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.
Check my propertyHow can we help you?
Get matched with trusted local builders
Understand what's allowed on your property
Learn the key rules and size limits for ADUs
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.
Morris County
BoontonChatham TownshipChester BoroughDoverEast Hanover TownshipFlorham Park BoroughHanover TownshipHarding TownshipJefferson TownshipKinnelon BoroughLincoln Park BoroughLong Hill TownshipMadison BoroughMendham BoroughMine Hill TownshipMontville TownshipMorris Plains BoroughMorristownMorris TownshipMountain Lakes BoroughMount Arlington BoroughMount Olive TownshipNetcong BoroughParsippany Troy Hills Township