Florida ADU Laws & Permit Guide (2026)
Florida ADU rules are set at the city and county level — there is no statewide preemption for single-family zones. The Live Local Act (2023) created incentives for affordable housing density. Miami, Tampa, and Orlando are the most ADU-active markets.
Florida ADU At a Glance
Permit Timeline
90–180 days
Average Build Cost
$90,000 – $210,000
Maximum Size
Varies by city (Miami: up to 900 sq ft in some zones)
Owner-Occupancy Required
Varies by city
Impact Fees
Varies; can be significant in South Florida
Setbacks
Varies; typically 5–7.5 ft rear and side
Recent Law Changes in Florida
Sweeping housing legislation that incentivizes affordable housing density statewide. Requires local governments to approve multifamily and mixed-use development near commercial corridors. Encourages ADUs as part of the affordable housing toolkit without mandating single-family lot ADU allowances.
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Browse Florida Contractors →Frequently Asked Questions — ADUs in Florida
Are ADUs legal in Florida?
ADU rules in Florida are set by individual cities and counties. Miami, Tampa, Orlando, and Jacksonville all allow ADUs in various forms, but rules differ significantly. There is no statewide law requiring cities to allow ADUs on single-family lots.
How much does it cost to build an ADU in Florida?
Florida ADU costs typically range from $90,000 to $210,000 for a detached unit. South Florida (Miami, Fort Lauderdale) tends to run higher due to hurricane-resistant construction requirements. Garage conversions are usually less expensive — often $40,000 to $90,000.
What is the Live Local Act and how does it affect ADUs?
The Live Local Act (HB 1339, 2023) is a broad housing bill that incentivizes affordable housing development by overriding some local zoning restrictions near commercial corridors. It does not directly require cities to allow ADUs on single-family lots, but it signals a state-level push toward more housing density.
Do I need to live on my property to build an ADU in Florida?
Owner-occupancy requirements vary by city and county in Florida. Miami requires owner-occupancy for accessory units in some zones. Check with your local planning department — rules differ significantly between cities.
How long does ADU permitting take in Florida?
Florida ADU permit timelines vary widely. Smaller markets may process permits in 90 days; Miami-Dade, Broward, and Palm Beach counties often take 120–180 days due to higher volume and hurricane compliance review.
Sources
- Florida Live Local Act (HB 1339) ↗
- City of Miami — Zoning & Planning ↗
- City of Tampa — Development Services ↗
Disclaimer: The information on this page is provided for general informational purposes only and does not constitute legal, financial, or construction advice. ADU regulations change frequently — always verify current rules with your local planning department and consult a licensed professional before making decisions. ADUHomeResource.com is not liable for any errors, omissions, or outcomes resulting from use of this information.