Florida ADU Laws & Rules by City (2026)

Key Florida ADU Laws

SB 48 died again (Mar 2026): the statewide ADU mandate passed the Senate 38-0 but died in House messages on the session's final day — local rules still govern
Live Local Act / §163.31771: a permissive framework — it lets (does not require) local governments allow ADUs in single-family areas; there is no statewide ADU mandate
City-level variation — Miami-Dade, Tampa, and Jacksonville leading adoption
Short-term rental rules vary significantly by municipality; the STR dispute is what killed SB 48

Florida Cities ADU Comparison

City	Max Size	Setbacks	Permit Fees	Build Cost	1BR Rent	Score
Jacksonville	25% of primary residence or 750 sq ft (whichever is smaller)	20 feet	$3,200-$5,000	$125,000-$245,000	$1,100-$1,600/mo	5/10
Miami	City of Miami: confirm current cap with City of Miami Planning (proposed ~500 sq ft / 10% of lot, capped at 800 sq ft). Unincorporated Miami-Dade: 400-800 sq ft in RU-1 districts (varies by district)	5 ft (RU-1 district)	$5,000-$8,000	$180,000-$350,000	$1,600-$2,200/mo	5/10
Orlando	1,000 sq ft max, 500 sq ft min; must be smaller than the principal structure (varies by sector)	15 feet	$2,800-$4,500	$130,000-$260,000	$1,200-$1,750/mo	6/10
Tampa	950 sq ft (larger setbacks apply when the ADU exceeds 15% of lot size)	3 ft (20 ft when the ADU exceeds 15% of lot size)	$3,500-$5,500	$140,000-$280,000	$1,300-$1,850/mo	3/10

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