ADU Rules in Florida: What Homeowners Need to Know in 2026

Unlike California or Washington, Florida has no statewide law requiring cities to allow accessory dwelling units. ADUs in Florida are governed entirely by local zoning, so whether you can build one — and how big — depends on your specific city or county.

Where Florida ADUs are allowed

Several Florida jurisdictions have adopted their own ADU ordinances, often to expand housing supply. Cities including Miami, Orlando, Tampa and St. Petersburg permit ADUs in some single-family zones, typically with size caps, setback rules and sometimes owner-occupancy requirements. Many other Florida cities still restrict or prohibit them.

What to confirm with your local planning department

• Whether ADUs (detached, attached or garage conversion) are permitted in your zoning district at all.
• Maximum ADU size — local caps commonly run 600–1,000 sq ft.
• Setback, height and lot-size minimums, plus any owner-occupancy or short-term-rental restrictions.
• Parking requirements, which vary widely between Florida cities.

Why it's worth checking first

Because Florida leaves ADU rules to local government, two neighboring cities can have completely different rules. Always confirm the current ordinance with your city or county before investing in design — then use the calculator below to estimate cost.

Florida ADU rules vary by jurisdiction and change over time. Confirm current requirements with your city or county planning department.