5 county-level rules, plus city-specific rules for 3 cities in Middlesex County, New Jersey.
Verified from official government sources
Middlesex County does not have a county-wide ADU ordinance. In New Jersey, accessory dwelling units are a zoning matter regulated by each municipality under the Municipal Land Use Law, so rules for New Brunswick, Edison, Woodbridge and the other 21 towns are set locally, not by the county.
Middlesex County has no county-wide shed ordinance. Statewide, New Jersey's Uniform Construction Code exempts a garden-type utility shed of 200 square feet or less and 10 feet or less in height from a construction permit, but each municipality still regulates shed placement through zoning.
N.J.A.C. 5:23-2.14(b)8
A construction permit for building work shall not be required for garden-type utility sheds and similar structures that are 200 square feet or less in area, 10 feet or less in height, and accessory to buildings of Group R-2, R-3, R-4, or R-5 and which do not contain a water, gas, oil, or sewer connection.
Middlesex County does not regulate garage conversions. Converting a garage to living space is a zoning and building matter handled by each municipality under New Jersey's Municipal Land Use Law and the statewide Uniform Construction Code, so rules depend on your specific town.
Middlesex County has no carport ordinance. Carports are accessory structures regulated by each municipality's zoning ordinance under New Jersey's Municipal Land Use Law, with construction permits governed statewide by the Uniform Construction Code.
Middlesex County has no tiny-home ordinance. In New Jersey, a tiny house is regulated by municipal zoning and the statewide Uniform Construction Code. A tiny home on wheels is generally treated as an RV or trailer and cannot be used as a permanent residence in most towns.
3 cities in Middlesex County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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Middlesex County Ordinance Hub →