ADUs are allowed in Florham Park BoroughTypes:DetachedInternal
Types:DetachedInternal
Accessory Dwelling Unit (ADU) Rules for Florham Park Borough, NJ
Is your property eligible for an ADU?
# of Properties
4,063
Owner-occupied
79%
Zoning districts
32
Avg Home Value
$943,418
Median Lot Size
0.35 acres
Avg Income
$174,199
Residential Types:
4,063 housing units
Other
100%
Zoning Districts:
4,205 parcels · 32 districts
R-15
49%(2,051)
POD-S
10%(432)
R-44
9%(395)
MF-2
5%(193)
Other
27%(1,134)
ADU Rules
What can you build in Florham Park Borough, NJ?
Florham Park 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 of 25% of the aggregate net habitable floor area on the lot.
Detached ADU Size Limits
- –Maximum ADU size of 25% of the aggregate net habitable floor area on the lot
- –Maximum 600 sq ft based on accessory building footprint cap for detached ADUs
Parking
- –2 spaces min; 4 spaces max; garages do not count; must be on the same lot, shown on site plan, not on lawn, not blocking sidewalks.
Rental Restrictions
- –ADUs may be rented only to income-eligible households for 10 years under a deed restriction; rents are capped during the control period. No short-term/vacation rentals; must be a principal residence (260 days/year) with a written lease.
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.
Morris County
BoontonChatham TownshipChester BoroughChester TownshipDenville TownshipDoverEast Hanover TownshipHanover TownshipHarding TownshipJefferson TownshipKinnelon BoroughLincoln Park BoroughLong Hill TownshipMadison BoroughMendham BoroughMine Hill TownshipMontville TownshipMorris Plains BoroughMorristownMorris TownshipMountain Lakes BoroughMount Arlington BoroughMount Olive TownshipNetcong Borough