Florida ADU Laws Explained (The 2026 Plain-English Guide)
SB 184 changed what cities can restrict. Here is what the law actually says, which cities are most permissive, and how to check your specific address.
By Joe Lombardo | ADU Florida Info | Updated April 2026
Reviewed against Florida Statutes and current municipal ordinances
What are Florida ADU regulations in 2026?
Florida's SB 184 (2025) requires all municipalities to permit ADUs in single-family residential zones. Key statewide minimums: ADUs must be allowed up to 1,000 sq ft, municipalities cannot require owner-occupancy, and ADUs cannot be restricted below 500 sq ft. Local cities may impose stricter rules above these minimums.
What SB 184 Changed — The 30-Second Version
Before SB 184 (Pre-2025)
Cities could require owner-occupancy
Cities could cap ADUs at any size (500 sq ft, 400 sq ft, etc.)
No statewide minimum size floor
After SB 184 (2025–Present)
Owner-occupancy mandates preempted for new approvals
Accessory dwelling units (sometimes searched as “accesory dwelling units”) are secondary housing units built on the same lot as a primary residence — and Florida now has one of the strongest statewide ADU frameworks in the South.
Florida Statutes §163.31771 establishes the statewide ADU framework. It sets a floor — cities can be more permissive, but not more restrictive than the state allows. In practice, this means every city has its own rules that operate within the state floor, and those city rules are where the real variation lives.
*Sarasota City has no hard cap stated in current code — confirm maximum with city planning.
3 Things That Kill ADU Projects Before Permits
Even with SB 184 in place, three physical and legal constraints stop projects before they reach the permit stage. Check all three before hiring a designer.
HOA and Deed Restrictions: Private deed restrictions and HOA covenants are not preempted by Florida ADU law. A homeowners association that prohibits accessory structures can still enforce that restriction against ADU construction. Florida courts consistently uphold properly recorded private deed restrictions over municipal zoning. Pull your deed and HOA documents from your county clerk's online records before spending anything.
Impervious Surface Ratio (ISR): Florida cities limit the percentage of your lot that can be covered by roofs, driveways, and hardscape (typically 40–50%). If you have a large pool, patio, or oversized driveway, you may have no ISR left for an ADU footprint. Use Orlando's free ADU Worksheet as a template for calculating ISR before designing in any city.
Septic System Capacity: Properties on septic (common in rural and semi-rural Florida counties) need sufficient drain-field capacity for the additional dwelling unit. Adding a second unit often requires a larger tank or secondary drain field. Get a septic evaluation before finalising your ADU plan — this is the most common hidden cost in non-sewered markets.
Most Permissive Florida Cities for ADUs
Tallahassee leads Florida with a 1,200 sq ft cap, citywide eligibility across all zoning districts, no owner-occupancy requirement, and administrative (non-discretionary) approval that typically takes 3–8 months. The 2024 reform (Ordinance 24-O-03) removed the former size constraint tied to the primary structure.
Jacksonville is the most permissive major city: ADUs by-right in most residential zones, 1,000 sq ft cap, no owner-occupancy requirement, no citywide STR prohibition. The “Keeping Our Families Together Act” (Ordinance 2022-0448-E) codified Jacksonville's ADU program with one of the clearest ordinances in the state.
Gainesville uniquely allows both one attached and one detached ADU on the same lot simultaneously. Free pre-approved plan sets (Plans 722A/B/C, 738B) eliminate $3,000–$8,000 in design fees and speed permit review to 3–4 weeks.
Most Restrictive Florida Cities for ADUs
West Palm Beach limits ADUs exclusively to the SF14 (Single-Family High Density) district — SF3, SF7, and SF11 (which cover most residential parcels) are ineligible. Owner-occupancy required. The city imposes the strictest STR minimum in Florida: 183 days (six months plus one day). Accessory apartments must be physically connected to a functioning garage. Ordinance: Chapter 94, Sec. 94-303.
Fort Lauderdale (Ordinance Sec. 47-19.2) caps ADUs at one bedroom and one bathroom, with a 600 sq ft or 49% of primary home dual cap (whichever is less). Annual Certificate of Use required for any rented ADU — inspection and renewal every year without exception. The Broward County HVHZ wind zone adds 20–30% to construction costs.
Tampa restricts ADUs to 8 designated eligible neighbourhoods under RS-50, SH-RS, and RS-60 zoning. Every project requires a Special Use permit approved before a building permit can be issued. Annual permit renewal required. Short-term rentals under 7 days prohibited.
Check if your address qualifies in 30 seconds
We match your parcel to the city-specific rules above and return a zoning result instantly.
Florida ADU Eligibility by Market: What Our Data Shows
Based on real address lookups processed through our zoning database, here's how eligibility breaks down across Florida's major markets. These figures reflect actual homeowner inquiries — not estimated averages.
Market
Likely Eligible
Possibly Eligible
Not Eligible
Key Driver
Jacksonville / Duval Co.
100%
—
—
Permissive residential base zoning
Melbourne / Brevard Co.
80%
20%
—
PUD lots may require variance
Port St. Lucie / St. Lucie Co.
—
100%
—
City confirmation required
Tallahassee / Leon Co.
20%
40%
40%
R-3 and multi-family zones ineligible
Miami / Miami-Dade Co.
—
8%
92%
RS-1/RS-2 + HOA prevalence
Miami-Dade's 92% not-eligible rate reflects strict RS-1/RS-2 zoning requirements, widespread HOA deed restrictions, and minimum lot sizes — not a failure to comply with SB 184. Jacksonville's 100% likely-eligible rate reflects Duval County's permissive RSF-1 through RSF-4 base zoning. Your specific address may differ — check your parcel directly.
What Floridians Call ADUs — and What the Zoning Code Actually Says
Florida homeowners search for ADU information under a dozen different names. Here’s how each common term maps to the legal definition — and what zoning rules apply.
What You Call It
Legal Term in Florida Code
Common In
Same Rules Apply?
Granny flat
Accessory Dwelling Unit (ADU)
Statewide, especially Tampa Bay
Yes — full ADU rules apply
In-law suite
ADU or Accessory Apartment
Statewide
Yes — if separate entrance + kitchen
Mother-in-law suite
ADU or Accessory Apartment
Statewide
Yes — if self-contained unit
Casita
Detached ADU / Guest Cottage
South Florida, Hispanic communities
Yes — detached ADU rules
Backyard cottage
Detached Accessory Dwelling Unit
Statewide
Yes — detached ADU rules
Guest house
Detached ADU or Guest Cottage
South Florida, rural counties
Yes — must meet ADU standards to be legal dwelling
Carriage house
Detached ADU (above or beside garage)
Historic districts, older neighborhoods
Yes — plus possible historic review
Garage apartment
Attached or Detached ADU
Statewide
Yes — above-garage ADU rules
Garage conversion
Interior or Attached ADU
High-density urban areas
Yes — interior conversion ADU rules
DADU
Detached Accessory Dwelling Unit
Planning/permit industry shorthand
Yes — same as detached ADU
Second dwelling unit
Accessory Dwelling Unit
Melbourne, Pinellas County code language
Yes — exact synonym in those codes
Tiny home
ADU or manufactured dwelling
Varies — depends on construction type
Depends: must meet Florida Building Code; HUD-code manufactured homes often excluded
Cottage
Detached ADU / Guest Cottage
Rural and coastal counties
Yes — detached ADU rules apply
Auxiliary dwelling
Accessory Dwelling Unit
Older Florida ordinances
Yes — same unit type
The legal test in Florida: regardless of what you call it, a unit triggers ADU zoning rules when it has its own entrance, sleeping area, bathroom, and kitchen (sink, cooking appliance, refrigerator). A room with a mini-fridge is not an ADU. A self-contained apartment over your garage is — and needs a permit whether you call it a granny flat, casita, or carriage house.
Frequently Asked Questions
Common questions from Florida homeowners about ADU laws, permits, and eligibility.
What are the ADU qualifications in Florida?
To qualify for an ADU in Florida, your property must meet four criteria: (1) Zoning — your parcel must be in a single-family or qualifying residential zoning district. SB 184 requires every municipality to allow ADUs in single-family zones, but cities like Tampa restrict eligibility to specific overlay districts. (2) Lot size — most Florida cities require a minimum of 5,000–7,500 sq ft; unincorporated county land typically requires 7,500 sq ft or more. (3) HOA — if your HOA deed restrictions prohibit accessory structures, that overrides local zoning — SB 184 does not preempt HOAs. (4) Setbacks — your lot must accommodate the required setbacks (typically 5–10 ft rear, 5 ft side). Owner-occupancy is no longer a qualification under SB 184.
Can I build an ADU on my property in Florida?
Probably yes — Florida SB 184 prohibits cities from banning ADUs outright in single-family zones. But eligibility depends on your city, zoning district, lot size, and HOA rules. Cities like Tampa (8 eligible neighbourhoods only) and West Palm Beach (SF14 zone only) still restrict most properties. Use our address check tool to confirm your eligibility in 30 seconds.
Does Florida require owner occupancy for ADUs?
No — Florida SB 184 (2025) preempts local owner-occupancy mandates for new ADU approvals. However, some cities' Special Use permit conditions still include occupancy requirements as of early 2026. Tampa is the notable example. Confirm current rules with your city's zoning department before assuming you can rent both units.
Can I use my Florida ADU as an Airbnb?
It depends on your city. City of Miami and City of Sarasota allow ADU short-term rentals with proper licensing. Tampa requires 7-day minimum stay. Orlando, Fort Lauderdale, and Clearwater require 30–31 day minimums that effectively prohibit Airbnb-style use. West Palm Beach imposes a 183-day minimum. See our full guide: Can I rent my Florida ADU on Airbnb?
Do HOA rules override Florida ADU laws?
Yes. Private deed restrictions and HOA covenants are not preempted by Florida's ADU statutes. If your HOA declaration prohibits accessory structures, you cannot build an ADU even if your city's zoning allows it. Florida courts consistently uphold properly recorded private deed restrictions over municipal zoning. Pull your HOA documents from your county clerk's online records and search for 'accessory structure' and 'additional dwelling unit' language.
What is Florida SB 184 and how does it affect ADUs?
Florida SB 184 (2025) strengthened Florida Statutes §163.31771 with three key provisions: cities cannot ban ADUs in single-family zones, cannot cap ADUs below 1,000 sq ft, and cannot require owner-occupancy as a blanket condition of approval. Cities retain authority over setbacks, design standards, height limits, short-term rental rules, and impact fees. The law sets a floor — cities can be more permissive, not more restrictive.
How many ADUs can a property have in Florida?
Florida law (§163.31771) establishes a baseline of one ADU per single-family lot. Most Florida cities and counties follow this limit. A few jurisdictions — including parts of unincorporated Miami-Dade and some Orlando neighborhoods — are piloting programs that allow two ADUs per lot (typically one attached or garage conversion plus one detached). These are exceptions, not the rule. If you want to build two ADUs, check your city's specific land development code. The default statewide answer is one.
Ordinance information verified March 2026. Regulations change — confirm current rules with your city's planning department before making permit or construction decisions.
Find Vetted ADU Builders in Your City
Once you know the rules, the next step is finding a builder who knows your local permit process.
