5 county-level rules, plus city-specific rules for 4 cities in Orange County, Florida.
Verified from official government sources
Orange County allows accessory dwelling units on many single-family lots subject to zoning district, lot size, and owner-occupancy rules. Maximum ADU size is typically 800 square feet or 50% of primary dwelling.
Fla. SB 184 (2025) - Affordable Housing / ADU
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 the provision of affordable housing for military families; requiring the Office of Program Policy Analysis and ...
Sheds under 100 square feet in unincorporated Orange County generally do not require a building permit but must meet setback rules. Anything over 100 sq ft requires a permit and Florida Building Code wind-load compliance.
Converting a garage into conditioned living space in Orange County requires building permits, replacement parking, and compliance with egress, insulation, and electrical codes. HOAs often prohibit visible conversions.
Detached carports in unincorporated Orange County require a building permit and must meet zoning setbacks. Open carports cannot be enclosed into a garage without separate permits and parking compliance.
Tiny homes on foundations must meet Florida Building Code like any dwelling. Tiny homes on wheels are regulated as RVs and cannot be used as permanent residences in most Orange County zoning districts.
4 cities in Orange County have their own accessory structures rules. Each link goes to that city's dedicated page with code citations.
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Orange County Ordinance Hub →