The Florida ADU Eligibility Index: 1 in 6 Homes Still Can’t Build — Despite SB 184
Florida’s SB 184 was billed as legalizing accessory dwelling units statewide. But when we analyzed 1,818 real address checks run through our zoning-eligibility engine, the promise and the parcel-level reality didn’t match. Among the 188 checks that produced a definitive determination, 84% of properties were eligible or had strong potential — but roughly 1 in 6 (16%) were still blocked by local zoning: neighborhood-specific eligibility maps, owner-occupancy mandates, size caps, and overlay districts a statewide headline never mentions.
Every determination, by verdict
Share of the 188 completed eligibility determinations that landed in each verdict. (Checks still awaiting authoritative parcel data are excluded — see methodology.)
Residential zoning that permits an ADU, pending a lot-specific confirmation.
Zoning and lot rules clearly allow an ADU today.
A local rule (zoning district, overlay, or use restriction) blocks an ADU.
Zoning or lot constraints make an ADU improbable without a variance.
Why “legal statewide” isn’t the whole story
SB 184 (2025) requires Florida jurisdictions to allow ADUs on most single-family lots — a genuine shift. But the law leaves cities meaningful room to set the terms, and those local terms are exactly where our 16% of blocked properties come from. The most common reasons a specific address fails:
Limits ADUs to 8 designated eligible neighborhoods under RS-50, SH-RS and RS-60 zoning — and every project needs a Special Use permit approved before a building permit.
Allows ADUs only in the SF14 district. SF3, SF7 and SF11 — which cover most residential parcels — are ineligible, and owner-occupancy is required.
Caps ADUs at one bedroom and 600 sq ft (or 49% of the primary home), with an annual Certificate of Use inspection for any rented unit.
Beyond these, the recurring blockers we see are owner-occupancy mandates, minimum-lot-size floors, overlay and historic districts, and short-term-rental prohibitions that make an ADU uneconomical. None of them appear in a “now legal statewide” headline — which is why an address-specific check matters more than the statute alone. Compare rules across markets on our Florida ADU laws guide or by county on the Hillsborough, Miami-Dade and Orange County zoning hubs.
Which side of the 16% is your property?
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Check my addressMethodology
The Index is built from real, in-production checks on ADU Florida Info’s address→zoning eligibility engine, which resolves a Florida street address to its parcel, pulls the governing zoning code from county and municipal GIS sources, and classifies ADU eligibility against local ordinance rules.
Volume: 1,818 distinct Florida addresses have been checked. Verdict split: the percentages above are drawn from 188 checks that produced a definitive eligibility determination. Checks in counties where we do not yet have authoritative parcel-level zoning coverage return an “awaiting verification” result and are excluded from the split rather than counted as eligible or blocked, so the numbers reflect determinations we can stand behind.
Interpretation: “Strong potential” means the parcel sits in a residential zoning district that permits ADUs pending a lot-specific confirmation (setbacks, lot size); “eligible” means those lot rules are also satisfied. “Not eligible” and “unlikely” mean a local rule blocks or strongly disfavors an ADU. Homeowners who run a check are self-selected, so the Index describes the properties Floridians are actually asking about — not a random parcel sample. Figures update as coverage and check volume grow.
Questions or a press inquiry about this data? Contact joe@adufloridainfo.com.