Florida's SB 184 ADU Law, Explained for Homeowners

What SB 184 Actually Requires

SB 184 passed during Florida's 2025 legislative session and became effective on July 1, 2025. Its core mandate is straightforward: local governments must allow at least one accessory dwelling unit on single-family-zoned lots statewide. Before SB 184, ADU permission was a patchwork. Some Florida cities welcomed ADUs, others allowed them only in narrow overlay districts, and some prohibited them outright in single-family zones. The new law removes that first barrier everywhere in the state.

The law also bars certain restrictive local provisions that historically made ADUs impractical even where they were technically legal. The clearest example is extra parking mandates. Requiring an additional off-street parking space or two was a common way to quietly block backyard units on typical residential lots, and SB 184 targets that kind of provision directly.

What SB 184 Does Not Do

This is where most of the confusion lives. SB 184 sets a floor, not a full code. It answers one question, whether an ADU must be allowed at all, and deliberately leaves the rest to local governments. If you read a headline suggesting Florida homeowners can now build whatever backyard unit they want, that is not what the statute says.

In practical terms, SB 184 opens the door, and your local ordinance still decides how wide. Two neighbors in different counties can both have the right to build an ADU while facing very different size caps, setbacks, and design standards. That is why permit-ready drawings for a Florida ADU always start with the local ordinance, not just the state statute.

The SB 48 Correction: A Bill That Died Is Not Law

Here is the part that trips up even well-meaning ADU websites. In the 2026 legislative session, Florida lawmakers considered SB 48, a bill that would have strengthened the state's ADU framework beyond what SB 184 established. SB 48 passed the Florida Senate by a vote of 38-0, which generated a wave of optimistic coverage. Then it died in the House on March 13, 2026. It is not law.

Despite that, some industry sites and ADU marketing pages still describe SB 48's provisions as if they were enacted. If you have read that Florida now guarantees specific ADU sizes, streamlined approvals, or other protections that go beyond the SB 184 floor, there is a good chance the source conflated the dead bill with the live statute. Building your project plan around provisions that never became law can lead to real problems at the permit counter.

The safe habit is simple: when a website cites a Florida ADU rule, check whether it is attributing that rule to SB 184, which is in effect, or to SB 48, which is not. When in doubt, confirm the current bill status through the Florida Legislature's official site or ask your local planning department what rules they are actually applying today. Legislatures revisit housing bills often, so a future session could take up similar provisions again, but as of this writing SB 184 is the operative statewide ADU law in Florida.

What to Check With Your Local Jurisdiction

Because SB 184 leaves the specifics local, your city or county planning department is the authority on what your ADU can actually look like. Before you fall in love with a floor plan, work through this checklist:

1. Confirm your zoning. SB 184's guarantee applies to single-family-zoned lots. Verify your parcel's zoning designation through your county property appraiser or planning department before assuming the law covers you.
2. Request the current ADU ordinance. Ask for the local rules on maximum unit size, setbacks, height, and where on the lot an ADU may sit. These are the numbers that will shape your design, and they vary by jurisdiction.
3. Ask about design and appearance standards. Some jurisdictions require the ADU to match the main house in materials or roof form. Others are flexible. Knowing this early prevents redesign later.
4. Review utilities and site constraints. Sewer versus septic, water connections, drainage, and flood-zone requirements can all affect feasibility and cost. Coastal and flood-prone areas of Florida often carry additional requirements, so ask specifically.
5. Confirm the permitting path and required drawings. Ask what a complete ADU submittal looks like in your jurisdiction so your drafting team can produce exactly what the reviewers expect.

Submittal requirements differ from one permit office to the next, but a Florida ADU package commonly draws from this set of documents:

• Site plan
• Floor plans
• Exterior elevations
• Building sections
• Structural sheets
• Energy compliance documentation

How SB 184 Changes ADU Feasibility in Florida

The biggest practical change is where the feasibility conversation starts. Before July 1, 2025, the first question for many Florida homeowners was whether an ADU was allowed at all, and in plenty of places the answer was no. Under SB 184, single-family lots start from yes, and the analysis moves to what fits: how large a unit the local ordinance allows, where setbacks let it sit, and what it will take to serve it with utilities.

The parking piece matters more than it might sound. On a typical residential lot, an extra parking mandate could consume the very yard space the ADU needed, quietly killing projects that were otherwise viable. Removing that kind of barrier means more ordinary lots pencil out, not just large ones.

For homeowners, the use cases have not changed, but the access has. Detached backyard cottages, garage conversions, and attached suites can serve aging parents, adult children saving for their own home, or long-term rental income, depending on what your jurisdiction permits. If housing family members is the goal, an ADU pairs naturally with multigenerational and universal design principles like step-free entries and accessible bathrooms, so the unit works for every stage of life.

Apex Drafting Services works with Florida homeowners fully remotely, from initial concept through a permit-ready drawing set tailored to your local requirements. Stock plans start at $799 for projects where an existing design fits, and custom ADU plans are quoted to your lot and jurisdiction. You can see how we approach projects across the state on our Florida service area page.

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