ADU rules in New Brunswick, NJ — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
New Jersey's ADU mandate (N.J.S.A. 52:27D-123.16, 2024) requires New Brunswick to allow ADUs by right on lots with single- or two-family homes. Owner-occupancy cannot be required. Min ADU size 850 sq ft cannot be restricted.
Under N.J.S.A. 52:27D-123.16 (effective 2025), all NJ municipalities including New Brunswick must permit ADUs by right. Owner-occupancy requirements and minimum lot sizes over 2,000 sq ft are prohibited. Given New Brunswick's density and Rutgers University presence, ADUs can significantly expand housing supply.
Unpermitted ADU: code enforcement. Zoning violation: $100 to $2,000/day. May require removal of unpermitted unit.
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Side-by-side rule comparisons with other cities in Middlesex County.
See how other cities in Middlesex County handle adu rules.
See how New Brunswick's adu rules rules stack up against other locations.
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