2 rules for unincorporated Martin County, Florida.
Verified from official government sources
Martin County adopted a comprehensive-plan amendment on February 24, 2026 to permit accessory dwelling units (ADUs) on single-family lots, replacing the older 'guest house' term. ADUs are capped at 850 square feet (or half the primary dwelling area, whichever is less) and must be built on a concrete foundation or slab.
Florida Senate Bill 184 (2025)
Housing; Authorizing a landlord to accept reusable tenant screening reports and require a specified statement; requiring, rather than authorizing, local governments to adopt, by a specified date, an ordinance to allow accessory dwelling units in certain areas; authorizing a local government to provide a density bonus incentive to landowners who make certain real property donations to assist in ...
Martin County requires a building permit to install a pre-manufactured shed with or without a slab. Sheds must comply with the Land Development Regulations Art. 3, Div. 2 (sec. 3.12, Table 3.12.1) for setbacks, lot coverage, and accessory-structure standards, and with the Florida Building Code.
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