ADU Builder in Miami-Dade County

Miami-Dade County follows the Miami 21 Zoning Code for the City of Miami and separate municipal codes for incorporated cities. Most single-family lots zoned T3-R (Sub-Urban) and T3-L (Sub-Urban Limited) permit detached ADUs by right. Garage conversions are allowed where parking replacement rules are met. Maximum ADU size is generally 1,200 sq ft or 50% of the primary dwelling, whichever is less. Setbacks vary by transect zone — typically 5–10 ft side and 10–15 ft rear.