Nassau County, FL Accessory Structures: Tiny Homes (2026)

24 of the Land Development Code, adopted by Ordinance No. 2023-038 and amended by Ordinance No. 2025-019, sets up two paths for a tiny home development (THD) in unincorporated Nassau County. A redevelopment THD can only be built on land that held a conforming or nonconforming mobile home park, travel trailer park or RV park in operation as of January 1, 2022, and it must fully redevelop that park rather than mix tiny homes with mobile homes or RVs. A local government THD can only sit on land a local government entity owns or manages.

24(B)(1) has to be a single-family detached or two-family dwelling with complete living, sleeping, cooking and sanitation facilities on a permanent foundation, capped at 800 square feet of gross floor area and built to the Florida Building Code - Residential. The county draws a hard line against "tiny houses on wheels" (THOWS), a category that includes RVs, travel trailers, motor homes, private motor coaches, fifth-wheels and park models: those are expressly prohibited inside a tiny home development. Rental units created under the program must stay income- and rent-restricted as "affordable" housing for a minimum of thirty years, recorded through a covenant that runs with the land.

Parking is capped between one and one and a half spaces per unit, and design standards require Class II development review, communal outdoor living space, and buffering from adjacent single-family uses. Owners must file an annual occupancy and rent report with the county's office of management and budget every February 1.