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Where we build ADUs in Miami-Dade
Florida leaves most ADU rules to local governments, so the answer changes at the city line. Here is what we check in each place we work.
What should City of Miami homeowners know first?
As of October 2026, the City of Miami regulates ADUs through its Miami 21 zoning code, and the city revised those rules in 2025. Published summaries describe these points:
- Zone matters. Whether an ADU is allowed depends on your lot's transect zone, and duplex lots are treated differently from single-family lots.
- Size by lot area. The ADU is capped at 10 percent of the lot, up to 800 sq ft. On a 5,000 sq ft lot that is 500 sq ft.
- Homestead tie. The house and ADU must have the same owner, and renting is tied to the main house being owner-occupied with a homestead exemption.
- Height. The ADU can never be taller than the main house.
Because these come from secondary summaries, we confirm the current Miami 21 text with the city for your address.
Which nearby communities do we serve?
Coral Gables
A planned city incorporated in 1925. New homes and building expansions go before the Board of Architects for design review.
ADUs in Coral GablesMiami Gardens
Miami-Dade's third-largest city, incorporated in 2003. Its council voted in 2026 to add ADUs to the city code.
ADUs in Miami GardensKendall
Largely unincorporated, so ADUs follow Miami-Dade County rules, including the 7,500 sq ft minimum lot.
ADUs in KendallNorth Miami
A city on Biscayne Bay with its own land development regulations. Flood zone checks come first near the water.
ADUs in North MiamiCheck what your lot allows
Send your address in any of these areas. We confirm which government reviews it and what that code allows.