Bergen County does not regulate accessory dwelling units at the county level. ADU rules are determined by each of the 70 municipalities, guided by New Jersey's Municipal Land Use Law and recent state ADU legislation.
Bergen County's land use authority is limited to county roads, drainage, and planning review under N.J.S.A. 40:27-1 et seq. Accessory dwelling units (ADUs) are regulated by individual municipalities through local zoning ordinances adopted under the Municipal Land Use Law (N.J.S.A. 40:55D-1). New Jersey has encouraged ADU adoption to increase affordable housing, but each Bergen municipality sets standards for size, owner-occupancy, parking, and permitting. Property owners must verify rules with their local zoning office. County subdivision and site plan review applies only when the ADU triggers thresholds under the County Land Development Standards.
Violations are enforced by the municipality, not the county. Penalties typically include zoning citations, removal orders, and daily fines under local code.
See how other cities in Bergen County handle adu rules.
See how Mahwah's adu rules rules stack up against other locations.
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