Fair Lawn, NJ Accessory Structures: Garage Conversions (2026)

Under Fair Lawn Borough Code Chapter 125, Article III, the R-1-1, R-1-2 and R-1-3 single-family residential zones permit only one one-family dwelling per lot with no other principal use, plus accessory uses customarily incidental to the principal use. Section 125-33 (Accessory buildings, structures and uses) requires that all accessory buildings, structures or uses be located only on the same lot as the principal building and comply with the bulk and area regulations of the underlying zone. Garage space accessory to a residential use is capped by zone: in R-1-1, R-1-2, R-1-3 and R-2 Zones, accessory garage space may serve up to two vehicles, with one additional vehicle bay allowed for each 6,500 square feet by which the lot exceeds 6,500 square feet. Converting garage square footage into habitable living space for the existing dwelling (an expanded family room, bedroom, or home office that does not create a separate dwelling unit) is a change of use requiring a zoning permit, and the Borough fee schedule lists a $45 zoning permit fee for new garages and garage conversions. Construction work is also regulated by the New Jersey Uniform Construction Code (N.J.A.C. 5:23), administered locally by the Fair Lawn Construction Code Official, with subcode permits required for building, electrical, plumbing and (where applicable) mechanical work, plus compliance with the New Jersey Residential Code (IRC subcode) for emergency egress, ceiling height, insulation, smoke and carbon monoxide alarms. Converting a garage into a fully independent second dwelling unit (kitchen, bathroom, separate entrance, separate utilities) is not a permitted accessory use under Chapter 125 and would require a use variance from the Zoning Board of Adjustment under N.J.S.A. 40:55D-70(d) before any UCC permit could be issued. Converted space may also affect the dwelling's ability to satisfy on-site parking requirements.