Accessory Dwelling Unit (ADU) Rules for Morris Plains Borough, NJ

Is your property eligible for an ADU?

# of Properties

2,439

Owner-occupied

78%

Zoning districts

Avg Home Value

$593,125

Median Lot Size

0.29 acres

Avg Income

$173,681

Residential Types:

2,439 housing units

Other

100%

Zoning Districts:

2,571 parcels · 25 districts

R-2

43%(1,096)

R-3

27%(683)

R-4

7%(191)

R-8

7%(169)

Other

17%(432)

ADU Rules

What can you build in Morris Plains Borough, NJ?

Morris Plains Borough, 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

Parking

–RSIS governs off-street parking; no explicit ADU min/max. Deviations allowed in the R-8 zone for certain affordable units.

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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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

See all municipalities in Morris County →See all New Jersey municipalities →

Browse addresses by ZIP in Morris Plains Borough

079502,367 addresses