Accessory Structures in Nassau County, FL (2026)
3 rules for unincorporated Nassau County, Florida.
Verified from official government sources
ADU Rules
Nassau County allows one accessory dwelling by right on any residentially zoned lot that permits a single-family home. Land Development Code § 28.15(K) caps it at 50 percent of the house's square footage or 800 square feet, whichever is smaller, with a six-foot setback and a 25-foot height limit.
Nassau County Accessory Dwelling Unit Rules
Some RestrictionsNassau County Land Development Code § 28.15(K)
(K)Accessory dwellings.(1)Accessory dwellings are permitted by right in all residentially zoned districts that permit single-family homes, and may be developed with new or existing single-family homes.(2)Only one (1) accessory dwelling is permitted per single-family home parcel.(3)An accessory dwelling may not be larger than fifty percent (50%) of the square footage of the single-family home wi...
Shed & Carport Rules
A tool or garden shed in unincorporated Nassau County is an accessory structure, and Land Development Code § 28.15 caps its footprint at the size of the main house, keeps it out of front and side yards on most lots, and sets a six-foot minimum setback from any lot line.
Nassau County Shed Size and Setback Rules
Some RestrictionsNassau County Land Development Code § 28.15
The square footage of an individual accessory structure shall not exceed the square footage of the principle (main) structure's footprint however, the foregoing square footage limitation shall not be applicable to any lot containing one (1) acre or more of upland area.(B)Accessory uses and structures shall not be located in required front or side yards in any zoning district except as follows:(...
Tiny Homes
Nassau County's Land Development Code § 28.24 creates a tiny home development program for the unincorporated area, capping each unit at 800 square feet on a permanent foundation and banning tiny houses on wheels from qualifying developments. Rental units must stay income-restricted and affordable for thirty years, and parking is capped at 1.5 spaces per unit.
Nassau County Tiny Home Development Rules
Some RestrictionsNassau County Land Development Code § 28.24(B), (D)(1)(b), (E)(5)(a)
(B)Definitions.(1)Tiny home (TH): A single-family detached or two-family dwelling unit providing complete independent living facilities for one (1) or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation constructed or otherwise secured on a permanent foundation with a gross square footage not to exceed eight hundred (800) square feet per dwelling un...
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