This article summarizes general, publicly available building-code information and is not legal, engineering, or code-compliance advice. The 9th Edition's final adopted text can still change before it takes effect — confirm specific requirements with your local building department or a licensed contractor before starting a project.
Florida updates its building code roughly every three years, and the next update matters for anyone planning a reroof or major HVAC work in Broward or Miami-Dade. The 9th Edition of the Florida Building Code (FBC), based on the 2024 International Codes, is scheduled to take effect December 31, 2026. It doesn't rewrite hurricane-zone construction from scratch, but it does change how a re-roof can be done — and it leaves open questions on the mechanical and energy side that aren't finalized in public sources yet. Here's what's confirmed so far, and what to watch for before you pull a permit.
When the 9th Edition Actually Takes Effect
The 9th Edition was posted for review in December 2025 and is set to take effect on December 31, 2026. In practice, Florida Building Code editions generally apply going forward from their effective date — a permit application submitted and approved before December 31 typically continues under the 8th Edition rules it was reviewed against, while anything submitted after that date falls under the 9th Edition. Exactly where that line falls for a specific project can depend on your city or county's own procedures, so if you're planning a reroof or HVAC replacement for late 2026, it's worth asking your contractor or building department which edition will actually govern your permit.
What Changes for Roofing: Recover vs. Full Tear-Off
The most concrete 9th Edition changes affect how a re-roof can be done without stripping down to bare decking:
- Existing membrane can stay. Where a vapor barrier or self-adhered membrane is already bonded to the roof deck, revised Sections 1507 (commercial) and R905 (residential) allow it to stay in place and simply be covered with an additional membrane layer, instead of being torn off first.
- Insulation and LWIC can stay. A revised Exception 3 lets a contractor keep an adequate existing or repaired substrate — including high-R-value insulation or lightweight insulating concrete (LWIC) — in place when only the upper roof covering is removed, rather than tearing down to the structural deck.
- Shingle coating rules are renumbered, not rewritten. Asphalt shingle coating requirements move to Sections 1507.2.10 and R905.2.9, but the substance stays the same — coatings still have to follow the manufacturer's installation instructions.
- Full tear-off is still required whenever the new roofing relies on the existing roof for attachment and the fastening and securement rules in Section 1504.1 can't be met on top of what's already there.
None of this touches the High-Velocity Hurricane Zone rules that make Broward and Miami-Dade different from the rest of the state — Sections 1512 through 1525 still apply in full, including product approvals, the secondary water barrier, and the multiple inspections covered in our Broward HVHZ roof permit guide. What's changing is narrower: how much of an existing roof assembly a contractor is allowed to leave in place before the new covering goes on.
Does This Replace the 25% Rule?
Not yet, and maybe not at all. Florida's existing 25% roof rule — which can turn a repair into a full-section replacement once more than a quarter of a roof section is touched within 12 months — has come up in the broader 9th Edition discussion, with proposals floated to loosen or eliminate it for roofs that qualify for the recover-in-place provisions above. As of this writing, that's a proposal under discussion rather than adopted code text, so the current 25% rule and its SB 4-D exemption remain in force. If a change to the 25% rule is adopted before December 31, 2026, we'll update this guide and our 25% rule article to match.
What About HVAC and Mechanical Permits?
This is the part of the 9th Edition that's harder to pin down right now. The edition is based on the 2024 International Codes, which generally points toward an updated energy-code baseline, but the Florida Building Commission has not published finalized residential mechanical- or HVAC-specific provisions distinct from the current 8th Edition in the sources available as of October 2026. Under the 8th Edition in effect today, Florida already requires blower-door and duct-leakage testing on new residential construction, commercial HVAC compliance with ASHRAE 90.1-2019, interlocks between large operable openings and HVAC systems, and condensate drains that can't connect directly to a plumbing drain, waste, or vent line. Those baseline requirements are likely to carry forward and could tighten as the code adopts newer reference standards — but if you're planning an HVAC replacement or new install for late 2026, confirm with your contractor or building department whether your specific permit will fall under updated testing or efficiency requirements before you finalize equipment and pricing.
What Broward and Miami-Dade Homeowners Should Do Now
- If you're planning a reroof in the next 12 months, ask your contractor whether your project qualifies for the recover-in-place provisions or will need a full tear-off under Section 1504.1 — it affects both cost and timeline.
- If a repair on an older roof might cross 25% of a section, review our 25% rule guide before scheduling the work, since the current rule hasn't changed yet.
- If your project will straddle December 31, 2026, ask explicitly which code edition your permit will be reviewed under.
- Verify any contractor's license at myfloridalicense.com and confirm NOA product approvals for HVHZ work — see our guide to what a Miami-Dade NOA is.
Bottom Line
The confirmed part of Florida's 9th Edition Building Code gives contractors more flexibility to recover an existing roof instead of tearing it down to the deck — a potentially meaningful cost and time saving once it takes effect December 31, 2026. The 25% rule hasn't been eliminated yet, and the mechanical/HVAC side of the 9th Edition isn't clearly defined in public sources as of this writing. For now, the safest approach for a Broward or Miami-Dade homeowner planning a reroof or HVAC project before year-end is the same as always: confirm current requirements with your building department, and work with a contractor who tracks code changes for a living rather than learning about them mid-permit. For the permit process itself, see our Broward HVHZ roof permit guide.