ADU rules in Miami Beach, FL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Miami Beach restricts ADUs under its Land Development Regulations. ADUs are permitted only in certain single-family residential zoning districts, must maintain the external appearance of a single-family home, and are subject to strict size and design requirements consistent with Miami-Dade County ADU standards.
The City of Miami Beach permits accessory dwelling units in select single-family zoning districts under its Land Development Regulations. ADUs must comply with Miami-Dade County Section 33-22 requirements, which limit one ADU per lot on properties with a minimum 7,500 square foot lot in RU districts inside the Urban Development Boundary. ADUs must be between 400-800 square feet in RU-1 districts and cannot exceed 50% of the primary dwelling size, with an absolute maximum of 1,200 square feet. The entire property must maintain the external appearance of a single-family home. ADUs may contain a full kitchen facility. Detached ADUs must be separated from the main structure by at least 5 feet and set back at least 7.5 feet from interior side and rear lot lines. ADUs require a building permit from the Building Department at (305) 673-7610 and must meet HVHZ wind load standards. Owner occupancy of either the primary residence or the ADU is typically required.
Unpermitted ADUs may result in code violation notices from Code Compliance at (305) 673-7555, mandatory removal orders, and fines escalating through the Code Enforcement Board. Converting structures without permits also creates liability for unpermitted work.
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Side-by-side rule comparisons with other cities in Miami-Dade County.
See how other cities in Miami-Dade County handle adu rules.
See how Miami Beach's adu rules rules stack up against other locations.
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