ADU rules in Miami, FL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
The City of Miami allows ADUs in T3-L transect zones under Miami 21 with maximum 450 sq ft. Owner occupancy required (homestead exemption). Proposed expansions to T3-R and T3-O zones. One ADU per property.
The City of Miami permits Accessory Dwelling Units under the Miami 21 zoning code. Currently allowed in T3-L (limited) transect zones. ADUs may not exceed 450 square feet. The primary residence and ADU must be under the same ownership. Owner occupancy is required as confirmed by a homestead exemption. ADUs can be rented if the primary residence is owner-occupied. Minimum one parking space required except in transit-oriented development zones. An ADU must have living/sleeping area, shower/bathroom, and kitchen with sink, countertop, and refrigerator. Building permits required with HVHZ compliance. Proposed zoning changes may expand ADUs to T3-R and T3-O zones.
Unpermitted ADUs require retroactive permitting or removal. Non-owner-occupied units violate homestead requirement. HVHZ non-compliance requires retrofitting.
Miami, FL
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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's adu rules rules stack up against other locations.
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