Florida ADU Laws 2026 (What State and Local Rules Allow)
Florida ADU rules are set locally. Here is what state law does and doesn't do, which cities are most permissive, and how to check your specific address.
By Joe Lombardo | ADU Florida Info | Updated June 2026
References Florida Statutes and cited municipal ordinances
What are Florida ADU regulations in 2026?
ADUs can be permitted in Florida, but there is no universal statewide right to build one on every residential property. Eligibility, size, setbacks, parking and occupancy requirements depend largely on the city or county rules applying to your parcel.
Can you build an ADU on your Florida property?
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ADUs can be permitted in Florida, but there is no universal statewide right to build one on every residential property. Florida Statutes §163.31771 allows local governments to adopt ordinances permitting ADUs in single-family areas — it does not require them to, and it does not preempt local control. Two bills that would have created statewide ADU rights, Florida SB 184 (2025) and SB 48 (2026), both failed in the Legislature and are not law.
Because there is no statewide mandate, the rules that matter are local. A city or county may permit ADUs broadly, limit them to certain districts, or set their own size, setback, parking and owner-occupancy requirements — and those choices vary widely across Florida.
The practical answer for Florida homeowners in 2026: whether you can build an ADU, and at what size, depends on your local jurisdiction and your parcel. What varies by city are the details — permitted districts, maximum size, required setbacks, parking, whether short-term rentals are allowed, and permit timelines. Check your specific address to see the parcel-level rules that may apply to your property.
One exception: HOA deed restrictions. If your homeowners association explicitly prohibits accessory structures, local zoning approval does not necessarily remove restrictions imposed by private covenants or recorded deed restrictions. Pull your HOA documents and search for “accessory structure” before assuming you're clear.
State Law vs. City Rules: Who Controls What
Accessory dwelling units (sometimes searched as “accesory dwelling units”) are secondary housing units built on the same lot as a primary residence — and in Florida, most ADU decisions are left to local governments.
Florida Statutes §163.31771 authorizes local governments to adopt ADU ordinances, but it does not set a statewide floor on size or occupancy and does not require any city to permit ADUs. In practice, each city and county sets its own rules, and that local variation is where the real answer lives.
Florida Statute §163.31771 also states that an application for a building permit to construct an ADU must include an affidavit attesting that the unit will be rented at an affordable rate to an eligible extremely-low-, very-low-, low- or moderate-income household. Confirm how the requirement applies to your project with the relevant local planning and building departments.
*Sarasota City has no hard cap stated in current code — confirm maximum with city planning.
3 Things That Kill ADU Projects Before Permits
Even where a local ordinance permits ADUs, 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.
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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. 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?
Whether a property qualifies for an ADU in Florida is set by the local jurisdiction, and typically depends on: (1) Zoning — your parcel must be in a residential district the local ordinance allows ADUs in; some jurisdictions restrict eligibility to specific overlay districts. (2) Lot size — a minimum lot size may apply, which varies by ordinance. (3) HOA — HOA covenants and private deed restrictions may prohibit an ADU even where local zoning would otherwise allow one; review the recorded restrictions applying to the property before relying on zoning eligibility. (4) Setbacks — your lot must accommodate the local setback requirements. Owner-occupancy requirements are set locally and still apply in some jurisdictions.
Can I build an ADU on my property in Florida?
It depends on your local jurisdiction. Local ordinances vary. A jurisdiction may permit ADUs in designated residential districts, restrict them to particular circumstances, or not provide for them in the applicable district. There is no statewide guarantee. Eligibility depends on your city, zoning district, lot size, and HOA rules. Use our address check tool to confirm your eligibility in 30 seconds.
Does Florida require owner occupancy for ADUs?
It depends on your jurisdiction. Florida does not prohibit owner-occupancy requirements statewide, and some cities still require it. Confirm the current rule 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) was a bill that would have expanded statewide ADU rights, but it did not pass and is not law; a later bill, SB 48 (2026), also failed. Florida's ADU framework rests on Florida Statutes §163.31771, which allows — but does not require — local governments to permit ADUs. Cities and counties set their own rules on size, setbacks, owner-occupancy, design standards, height limits, short-term rentals, and impact fees.
How many ADUs can a property have in Florida?
The number of ADUs allowed is determined by the applicable local ordinance and may vary by jurisdiction and zoning district.
Ordinance information based on cited municipal sources. 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.
