The Florida 25% Roof Rule,Explained Honestly
Whether storm damage means a repair or a full replacement often comes down to one line of the building code — and one date in your roof's permit history. Here's how the rule works now, after the 2022 law change most articles still miss.
Every storm that crosses the Treasure Coast produces the same phone call: "A section of my roof is damaged. Can you just repair it, or does the whole thing have to be replaced?"
The honest answer depends less on the size of the damage than most people expect — and more on your roof's permit history. That's because of a provision in the Florida Building Code known as the 25% rule, and a 2022 law that changed how it applies.
The Rule ItselfOne Sentence of Code
In plain English: if work on a roof section crosses 25% of that section within any 12-month window, you generally can't keep patching. The entire section must be brought up to current code — current underlayment, current fastening, current secondary water resistance. On an older roof, that's functionally a replacement.
The intent isn't to sell roofs. It's windstorm mitigation: Florida doesn't want large areas of old, under-spec roofing rebuilt to old, under-spec standards in a hurricane state.
One Date Decides Everything
In May 2022, after the Surfside collapse, the Legislature passed Senate Bill 4-D. Most of it concerned condo inspections — but one section rewrote the 25% rule by adding subsection (5) to Florida Statute 553.844. The change turns on the day the 2007 Florida Building Code took effect:
Permitted on or after March 1, 2009The new rule protects you
If your roof was built, repaired, or replaced in compliance with the 2007 code or later, the all-or-nothing requirement no longer applies. Repair any percentage — 30%, 50%, more — and only the portion being worked on must meet current code. The rest of the roof stays as it is.
Permitted before March 1, 2009The original rule applies in full
Cross the 25% threshold on a section within 12 months, and the whole section must come up to current standards. There is no partial-repair escape hatch for pre-2007-code roofs.
Two neighbors with identical storm damage can face completely different outcomes — one gets a permitted repair, the other is legally looking at replacement — purely because of when each roof was permitted.
Treasure Coast's 2004 Roofs Are on the Wrong Side of the Line
In September 2004, Hurricanes Frances and Jeanne made landfall at Treasure Coast three weeks apart, and 2004 through 2006 saw the largest concentrated re-roofing period this area has ever had. An enormous number of Martin County roofs date to that window.
Every one of those roofs was permitted before March 1, 2009 — which means the SB 4-D exemption does not protect them. If a 2005 roof takes damage that crosses the 25% line, the code points to full section replacement at current standards.
The practical takeaway: Florida architectural shingle lasts 20–25 years, and the hurricane cohort is 20–22 years old now. If your roof went on after the 2004 storms, the 25% rule and the calendar are pointing the same direction. That's not a sales line — it's what the permit dates and the code say. The useful move is finding out where your roof stands before the next storm decides for you.
Not sure when your roof was permitted? buildign department keep permit records, and we look them up as part of every free roof inspection — the permit date is the first thing worth knowing about any Treasure Coast roof.
How the 25% Is Actually Measured
Per section — not the whole roof
The code defines a roof section as a separated area, divided by features like walls or level changes. On many homes the roof is one section; on others an addition or flat rear section counts separately. Which applies to your house changes the math substantially.
Tie-off work doesn't count
A 2021 Florida Building Commission declaratory statement (DS 2021-007) clarified that material removed and reinstalled solely to connect the repaired area to the unrepaired area is not counted toward the threshold.
The building official decides
Not your contractor, not the insurance adjuster. The local building department defines the section and whether 706.1.1 triggers. A good contractor measures honestly, documents with photos, and tells you which side of the line you're likely on — before you commit.
The Code Says What You May Do. Your Policy Says What's Covered.
People blur these two together, and it costs them. Repair versus full-section replacement is a permitting question. Whether your carrier pays for code-required upgrades depends largely on your policy's ordinance or law coverage — the provision that funds bringing a roof to current code when the code demands more than a like-for-like repair. Limits vary widely; read your declarations page on a sunny day, not after a storm.
One more connection worth knowing: if the rule pushes you into a code-compliant replacement, the new roof — with current fastening and secondary water resistance — typically earns credits on a wind mitigation inspection that can meaningfully reduce your premium. The rule that forces the upgrade also helps fund it, if you file the paperwork.
What to Do After Roof Damage
Document first
Dated photos of the damage, inside and out, before anything is moved or covered.
Protect the interior
Emergency tarping stops the damage from compounding — our Treasure Coast line, (772) 800-8897, is answered 24 hours.
Get an inspection before you get a pitch
After every storm, out-of-area crews knock doors selling whichever answer they're equipped to deliver. What you need first is the facts: damage extent, section math, and your permit date. Our free inspection gives you a photo report you keep, whatever you decide.
Then talk to your insurer
With documentation in hand and an understanding of which side of the 25% line you're on.
25% Rule FAQs
Does the 25% rule apply to my whole roof or just one section?
Per roof section, as defined by the code — separated areas divided by features like walls or level changes. On many single-family homes the roof is one section, but not always. The local building department's interpretation of your roof's sections is what controls.
My roof was installed in 2005. Am I exempt under the new law?
No — and this catches a lot of Treasure Coast homeowners by surprise. The SB 4-D exemption only covers roofs built, repaired, or replaced in compliance with the 2007 Florida Building Code, which took effect March 1, 2009. A 2005 roof falls under the original rule: damage beyond 25% of a section generally means bringing that entire section to current code.
My roof was replaced in 2015. Can I repair more than 25% of it?
Generally yes. A roof permitted after March 1, 2009 qualifies for the exemption, so only the repaired portion must meet current code — regardless of the percentage. The permit record is your proof; keep it.
Who decides whether my damage exceeds 25%?
The local building official — City of Stuart, Martin County, palm Beach or your municipality — not the contractor and not the insurance adjuster. A contractor's job is to measure and document honestly so the determination goes smoothly.
Does the rule apply to tile and metal roofs, or just shingle?
All roofing systems — shingle, tile, metal, and low-slope membranes. The code language covers roof systems and roof sections generally.
Does my insurance have to pay for a full replacement if the rule triggers one?
Not automatically. Code-required upgrades are typically paid under your policy's ordinance or law coverage, and those limits vary by policy. Check your declarations page or ask your agent — before storm season tests it.
Know Where Your Roof Stands
The 25% rule isn't negotiable after the damage is done — but where your roof falls under it is knowable today, for free. A permit-date lookup and an honest inspection tell you whether you have the repair flexibility of the new rule or the all-or-nothing exposure of the old one.
Get My Free Inspection(772) 800-8897
Expert Roofing Services, LLC is a Florida State Certified roofing contractor (CCC1332394) and general contractor (CGC1533052) headquartered at 7847 SW Ellipse Way, Stuart, FL. This article explains building code provisions in general terms and reflects the law as of September 2026; the determination for any specific roof belongs to your local building department. Verify permit history with the City of Stuart or Martin County Building Department, and confirm coverage details with your insurance agent.