Florida's 25% Roof Rule, Explained in Plain Terms

Under Fla. Stat. § 553.844, when an existing roofing system built, repaired, or replaced under the 2007 Florida Building Code or a later edition is repaired, replaced, or recovered, only the repaired, replaced, or recovered portion is required to meet the code in effect. If 25 percent or more of a roofing system or roof section is repaired, replaced, or recovered, only that portion must meet the Florida Building Code in effect. The exception covers roofs built, repaired, or replaced under the 2007 code or a later edition. Here is how it works, what counts, and how it connects to permits and insurance.

What the 25% roof replacement rule says

Fla. Stat. § 553.844 limits the code upgrade to the repaired, replaced, or recovered portion, but only if the existing roofing system or roof section was built, repaired, or replaced under the 2007 Florida Building Code or a later edition and 25 percent or more of it is being repaired, replaced, or recovered; the portion must then meet the code in effect. Once an existing roofing system or roof section built, repaired, or replaced under the 2007 Florida Building Code or a later edition has 25 percent or more repaired, replaced, or recovered, only that portion must meet the code in effect.

Two conditions matter. First, the existing roof must have been built, repaired, or replaced under the 2007 Florida Building Code or a later edition. Second, the 25 percent is measured against the roofing system or a roof section. The statute does not measure it against the whole building by default.

The rule also sits inside the code that governs existing buildings. Roof repairs and replacements are part of that work, not only new construction.

Where the rule comes from and why it matters in Florida

The rule comes from Fla. Stat. § 553.844(5), which applies notwithstanding any contrary provision in the Florida Building Code and directs the Florida Building Commission to adopt it by rule and incorporate it in the code, the statewide code for building work. Fla. Stat. § 553.73 says the code covers the design, construction, alteration, modification, repair, and demolition of buildings. That means roof repairs fall within its reach.

Florida law also requires a permit before work starts. Fla. Stat. § 553.79 makes it unlawful to repair a building without first getting a permit from the enforcing agency. The permit comes after paying the agency’s adopted fees.

Why does this matter in South Florida? Homes here face strong wind and wind-driven debris. The code’s roof wind rules reflect that risk. The analysis for Section 1504.1 states that the section was revised to clarify that roofs have to comply with all of Section 1504. A partial job can still bring those wind rules into play.

How the 25% threshold is measured

Start by measuring the area being repaired, replaced, or recovered. Then compare that area with the roofing system or roof section it belongs to. If the result is 25 percent or more, the portion-only rule applies.

Here is a simple example. Say a roof section covers 1,000 square feet. A crew replaces 300 square feet of tile on that section. That is 30 percent, so the threshold is met. This example assumes the roof was built under the 2007 code or later.

Your permit file and the building department’s review decide how a project is classified.

Has the 25% rule been modified?

Yes, the roof-recovering section has changed in recent code editions. The analysis for Existing Building notes that Condition 1 of Section 706.3 was revised for clarity. Exception 3 now lets only the upper roof covering or roof system be removed during recovering. That is allowed when the existing or repaired substrate is adequate.

The same analysis says Exception 5, which covered roof coatings, was deleted. Its language now covers existing vapor barriers and self-adhering underlayments.

The statute also limits local changes. Because the wording shifts by edition, confirm which edition applies to your project before you plan the work.

How the 25% rule connects to insurance and roof age

The building code and insurance are separate. They meet at roof age and code upgrades.

Roof age comes first. For partial jobs, the count starts with the first partial job that led to that full coverage.

Ordinance or law coverage is next.

Windstorm mitigation is a separate topic. Fla. Stat. § 553.844 requires certain windstorm techniques when a roof is replaced on a site-built, single-family home. The Florida Office of Insurance Regulation explains that homeowners submit an official mitigation inspection form to an insurance agent to seek premium discounts. Keep your permits, inspection reports, and estimates together. That record makes the roof’s history clear when insurance questions come up.

Does an HOA cover roof replacement in Florida?

Who pays for a roof depends on the association’s governing documents. The 25% rule does not decide that.

Settle responsibility early. Approvals, costs, and insurance can differ when the association maintains the roof and when the owner does. Review the governing documents before you schedule any work.

Under § 553.844(5), if an existing roofing system or roof section was built, repaired, or replaced under the 2007 Florida Building Code or a later edition and 25 percent or more is being repaired, replaced, or recovered, only the repaired, replaced, or recovered portion must be built to the Florida Building Code in effect. Under Florida law, the Florida Building Code governs repair work, but under § 553.844(5) only the repaired, replaced, or recovered portion of a qualifying roof section must meet the code in effect when 25 percent or more is being repaired, replaced, or recovered.

What to ask before choosing a partial repair or full replacement

Start with the numbers. Find the area affected, then measure it against the roof section it belongs to. Check the permit history on file for that section.

Ask these questions before you decide:

• How much of the roof section is affected, and what percentage does that make?
• Was the roof built, repaired, or replaced under the 2007 code or a later edition?
• What is the roof covering type: tile, metal, or another material?
• What is the condition of the underlayment and decking?

A roof inspection records the existing condition. That record supports the repair scope and any insurance discussion. For tile roofs, read our tile roofing guide before you choose between repair and replacement.

Frequently asked questions

How long does a Miami roofing permit review take?