Since 2022, Florida's 25 percent roof rule doesn't force a whole new roof if yours was built to the 2007 code or later. Older roofs are a different story.

If someone has told you "the 25 percent rule means you need a whole new roof," you're not alone. It's one of the most repeated lines in Florida roofing, and it's often half right at best. The rule is real. But it was changed by the Legislature in 2022, and for a lot of houses the change means the opposite of what you've heard.

This guide walks through what the statute and the building code actually say, word for word where it matters, so you can judge it yourself. It comes from the team at Superior Roofing & Restoration, a licensed Florida roofing contractor (CCC1325604) working out of Tampa, DeLand and a Panhandle office in Miramar Beach. It's general information, not legal advice about your house.

What the 25 percent rule actually says

The rule lives in the Florida Building Code, Existing Building, 8th Edition (2023), Section 706.1.1. Here's the base text:

"Not more than 25 percent of the total roof area or roof section of any existing building or structure shall be repaired, replaced or recovered in any 12-month period unless the roof covering on the entire existing roof system or roof section is replaced or recovered to conform to the requirements of this code."

In plain terms: if the work on a roof (or on one section of it) goes past 25 percent within 12 months, the default rule says the covering on that whole roof or section has to be brought up to the current code. Repairs after damage get pointed at the same section. The code's repair chapter (Section 406.2) says repairs to damaged buildings have to comply with Section 706.

Two details in that sentence change the math more than people expect.

It can be 25 percent of a section, not the whole house

The code defines a roof section as a division of the roof area by existing expansion joints, parapet walls, flashing (not counting valleys), a difference in elevation (not counting hips and ridges), roof type or legal description. It also leaves out the area needed to tie new work into the existing roof.

So a low-slope porch roof next to a shingled main roof can be its own section. A hip or a ridge on an ordinary shingle roof doesn't split it into sections.

It's measured over any 12-month period

The text counts work "in any 12-month period." Two smaller repairs a few months apart can add up. A patch in spring and another one after a fall storm both count toward the same window.

What changed in 2022

In May 2022, during a special session, the Legislature passed Senate Bill 4-D. The Governor approved it on May 26, 2022, and the roof part took effect right away. It added a new subsection (5) to Section 553.844 of the Florida Statutes. Here's the key part:

"if an existing roofing system or roof section was built, repaired, or replaced in compliance with the requirements of the 2007 Florida Building Code, or any subsequent editions of the Florida Building Code, and 25 percent or more of such roofing system or roof section is being repaired, replaced, or recovered, only the repaired, replaced, or recovered portion is required to be constructed in accordance with the Florida Building Code in effect, as applicable."

Read that again slowly. For a roof built to the 2007 code or any later edition, going past 25 percent doesn't pull the rest of the roof into the job. Only the part being worked on has to meet the code in effect.

The same subsection says a local government "may not adopt by ordinance an administrative or technical amendment to this exception." Your county can't write its own stricter version.

The Florida Building Commission put the exception into the 8th Edition code nearly word for word, right under the base rule in Section 706.1.1. The Senate's bill analysis describes it the same way: before the bill, the code had the 25 percent rule with no exception for newer roofs, and the bill created one.

Does the rule apply to my roof?

It comes down to one question first: was your roof built, repaired or replaced to the 2007 Florida Building Code or later?

When did the 2007 code take effect?

Not in 2007. The state rule adopting the 2007 edition set its effective date as March 1, 2009. So a roof installed under a permit in, say, 2015 sits on the newer side of the line. A roof that's been on the house since 2004 doesn't.

Roofs permitted right around early 2009 are the gray zone. Which code edition a permit was reviewed under is something the permit record can tell you better than the calendar can.

How do you find out?

Your local building department keeps permit records. Ask for the permit history on your address and look for the last reroof permit. Check the issue date, and check whether it passed final inspection. Ask your roofer to look it up too. A good one checks before telling you what the 25 percent rule requires.

If there's no permit on record for the last roof, that's worth knowing early. It makes it harder to show the roof was built to the 2007 code or later.

If your roof is older than that

Then the base rule still applies. If more than 25 percent of the roof or a roof section needs work in 12 months, the covering on that whole roof or section has to be replaced or recovered to current code. Recovering means a new covering over the existing one, and the code limits when that's allowed (for example, not over a roof that already has two or more layers, or over clay or cement tile).

On a site-built single-family home, the statute also says a roof replacement has to include improved roof-deck attachment and a secondary water barrier. In the wind-borne debris region, houses at $300,000 or more (by the value measure the statute spells out) may also need roof-to-wall connection work, capped at about 15 percent of the reroof cost. The building department applies those details. If you're headed that way, our roof replacement page covers how we handle a full reroof.

What the 25 percent rule doesn't say

This is where a lot of sales pitches go wrong.

The rule doesn't say any damage means a new roof. It doesn't say a roof needs replacing because of its age. It's a building code rule about how much of the roof has to be brought up to the current code when work is done. Nothing more.

For a roof built to the 2007 code or later, the answer since 2022 is short: only the part being worked on. If somebody tells you a newer roof needs to come off entirely "because of the 25 percent rule," ask them to show you the section of code they mean. Then compare it to the exception quoted above.

That doesn't mean a newer roof never needs replacing. Plenty do, for real reasons you can see in photos. It just means the 25 percent rule isn't the reason.

Honestly, the fair version of this conversation sounds like: here's what's damaged, here's how much of the roof that is, here's when your roof was permitted, so here's what the code requires. If you're getting a shortcut instead, slow down.

Who decides?

Not the roofer, and not you. The local building official does.

Under Section 553.80 of the Florida Statutes, each local government and legally constituted enforcement district regulates building construction and enforces the Florida Building Code. The Florida Building Code, Building, Section 105.1, says anyone who intends to repair or alter a building, where the work is regulated by the code, has to apply to the building official and get the required permit first.

So the roofer applies for the permit and describes the scope. The building department reviews it and inspects the work. Whether your roof qualifies for the 2022 exception, and how much of it has to be brought up to code, gets settled by the building official for your address.

A practical tip: if you get two roofers telling you opposite things, call the building department and ask how they apply Section 706.1.1 to a roof permitted in your roof's year.

What happens if I wait?

Waiting doesn't change the date your roof was permitted, so it won't move you from one side of the 2022 exception to the other.

What it can change is the size of the job. If a damaged area keeps letting water in, the share of the roof that needs work can grow. That share is the number the 25 percent test looks at. On an older roof, a repair that would have stayed under 25 percent can end up over it.

The 12-month window works both ways, too. Small repairs spread out over a year still add up on an older roof. Fixing a problem once, properly, usually beats patching it twice.

If you're unsure whether you're looking at a roof repair or something bigger, get someone on the roof sooner rather than later and ask for photos and a measured percentage.

FAQ

What is the 25 percent roof rule in Florida?

It's Section 706.1.1 of the Florida Building Code, Existing Building. If more than 25 percent of a roof or roof section is repaired, replaced or recovered in any 12-month period, the covering on that whole roof or section has to meet current code, unless the 2022 exception applies.

Is the 25 percent rule still in effect?

Yes, the base rule is still in the code. Since 2022, Florida Statutes 553.844(5) carves out roofs built, repaired or replaced to the 2007 Florida Building Code or later. For those, only the portion being worked on has to meet the current code.

Does the 25 percent rule apply to metal or tile roofs?

The rule's text covers "the total roof area or roof section of any existing building or structure" and doesn't name a roofing material. The same 2007 code test decides whether the exception applies.

Can my city or county make the rule stricter?

Not for the 2022 exception. The statute says a local government may not adopt by ordinance an administrative or technical amendment to it.

What is the new roof law in Florida?

People usually mean Senate Bill 4-D from the May 2022 special session. Its roof section added subsection (5) to Florida Statutes 553.844, the exception for roofs built to the 2007 code or later.

Book a roof inspection in Florida

If you've been told you need a whole new roof and you'd like a second look, we'll tell you what we see, including when it's just a repair. An inspection visit takes about 90 minutes: we walk the roof, take photos of what we find, show you a sample board, take measurements and give you a firm written number. We work out of Tampa and DeLand, with a Panhandle office in Miramar Beach. See our Emerald Coast, Tampa and Daytona pages, call 844-TARP-247 (Panhandle 850-987-0656), or book a roof inspection. Florida roofing license CCC1325604.

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