Freehold, NJ Accessory Structures: Tiny Homes (2026)

Monmouth County tiny home regulation is undergoing significant change following NJ's 2024 ADU law (P.L. 2024 c.38, N.J.S.A. 52:27D-123.16 et seq., signed July 2024, effective 2025). The law mandates municipalities permit accessory dwelling units by right on any lot containing a single-family or two-family dwelling, with limitations on what restrictions towns can impose: no owner-occupancy requirements, no minimum lot sizes above 2,000 sq ft, no maximum ADU sizes below 850 sq ft, and streamlined permitting. Tiny homes on permanent foundations in Monmouth County can potentially qualify as ADUs under this law. Foundation-built tiny homes must meet NJ Uniform Construction Code (N.J.A.C. 5:23) with modifications per Appendix Q of the IRC (NJ adoption through UCC) for dwellings under 400 sq ft: reduced minimum ceiling height (6 ft 4 in for habitable rooms), reduced stair and loft requirements, smaller egress windows. Most Monmouth municipal zoning has minimum habitable space requirements traditionally 600-800 sq ft for dwellings; ADU law may preempt some of these minimums. Tiny homes on wheels (THOW) are classified as recreational vehicles under NJ Motor Vehicle Commission Title 39, not as dwellings. Most Monmouth towns prohibit long-term residential occupation of RVs/THOW on residential lots: Middletown Code §525-47 prohibits overnight RV occupation; Howell Code §188-152 limits RV occupation to 14 days; Long Branch Code §345-90 prohibits THOW residential use. RV parks in Monmouth (Allaire State Park area, Ocean Grove area) allow THOW placement with park permits. Campgrounds may allow. Utility connections (water, sewer, electric) trigger building code review. Some Monmouth towns are considering specific tiny home zoning overlays following statewide ADU changes. Municipal response to new ADU law being developed during 2025.