Newport Beach, CA Accessory Structures: Tiny Homes (2026)

Tiny homes in Newport Beach are regulated based on their construction type and foundation. Site-built or factory-built tiny homes placed on permanent foundations are treated as standard dwelling units or accessory dwelling units and must meet California Building Code minimum habitation standards including minimum ceiling heights, egress windows, plumbing, electrical, and mechanical systems. ADU-sized tiny homes benefit from state ADU law (AB 68, SB 13) streamlining and reduced fees. Tiny homes on wheels (THOWs) are classified as recreational vehicles under NBMC and California Vehicle Code definitions. They cannot be occupied as permanent residences on residential property and must comply with RV parking restrictions. THOWs may not be connected to permanent utilities on residential lots. Newport Beach has not adopted a tiny home on wheels ordinance allowing them as alternative dwellings. Shipping container homes and other non-standard construction types require building department review for compliance with California Building Code structural, fire-resistance, and insulation standards. The Planning Division evaluates all tiny home proposals for zoning conformity at (949) 644-3200.