Florida does not require impact windows on every home. The Florida Building Code requires every glazed opening (windows, glass doors, and skylights) in a wind-borne debris region to be either impact-resistant or covered by approved impact-rated protection, such as hurricane shutters or storm panels. Impact windows, often called hurricane windows, are one way to meet that rule. Shutters and panels are the other. Whether the rule applies to your home depends on your address, your local design wind speed, and, for older homes, how much glass you replace at one time.
Florida’s 9th Edition building code takes effect December 31, 2026, so homeowners in Bradenton, Sarasota, and nearby Gulf Coast communities who are planning a window project should understand where the lines fall today. This guide explains the rules in plain language.
The Florida Building Code is the statewide minimum construction standard. Every city and county enforces it through a local building department. The version in effect today is the 8th Edition (2023), which took effect December 31, 2023.
For windows, the code does two separate jobs. First, every window must handle wind pressure. This is called design pressure, or DP, which is the amount of wind force a window is rated to withstand. Design pressure applies everywhere in Florida, inland or coastal.
Second, in areas the code calls wind-borne debris regions, glazed openings must also be protected from flying debris. The code requires large-missile impact protection for openings at or below 30 feet above the ground and small-missile protection for openings higher up. A large-missile test simulates a piece of lumber hitting the glass during a storm. That testing is what separates an impact window from a standard replacement window.
Yes. The Florida Building Code is adopted under Chapter 553 of the Florida Statutes and applies statewide. Local building departments enforce it, review permit applications, and inspect the work. Local governments can also adopt amendments, so homes a few miles apart can face slightly different requirements.
Florida built its statewide code after Hurricane Andrew struck South Florida on August 24, 1992, and showed how quickly a home fails once wind and debris break through windows and doors. The Florida Building Code took effect March 1, 2002. That date still matters, because homes built before the statewide code can qualify for a replacement exception explained later in this guide.
Impact protection is required in wind-borne debris regions and in the High Velocity Hurricane Zone. Outside those areas, homeowners can install non-impact windows, as long as the windows carry Florida product approval and meet the design pressure for the location.
A wind-borne debris region is an area where hurricane winds are strong enough to turn loose objects into dangerous debris. Under the current 8th Edition code, a home is in a debris region if either of these is true:
The design wind speed here is the ultimate design wind speed for Risk Category II buildings, the category that covers most homes. These speeds come from official wind maps adopted into the code, not from storm forecasts.
The High Velocity Hurricane Zone, or HVHZ, covers Miami-Dade and Broward counties. Products installed there must pass a stricter set of Florida test protocols, and many carry a Miami-Dade Notice of Acceptance (NOA). Southwest Florida is not in the HVHZ, but homeowners here can still choose products rated for it.
Not always. A home more than 1 mile from the coast, in an area where the design wind speed is below 140 mph, falls outside the debris region. Windows there still need Florida product approval and the right design pressure rating, but impact glass is optional. Wind speeds vary by address, so check with your local building department before assuming your home is exempt.
For many Gulf Coast homes, yes. Coastal parts of Sarasota and Manatee counties sit in high-wind-speed zones that place them in the debris region. For example, an ASCE 7-22 wind hazard report for a Siesta Key address shows a design wind speed of 150 mph for Risk Category II and states that glazed openings must be protected against wind-borne debris. That is well above the 140 mph threshold.
Both counties have also set debris region boundaries by local ordinance. Sarasota County applies the code’s wind-borne debris requirements within the county, and Manatee County adopted a wind-borne debris region map by ordinance. Incorporated cities can enforce the code through their own building departments, so the department that covers your address in Bradenton, Sarasota, Venice, Lakewood Ranch, Parrish, Longboat Key, or Siesta Key confirms your requirements.
There are three reliable ways to check:
At Mr. Build, we confirm wind zone, design pressure, and product approval requirements during every free in-home consultation.
Do Replacement Windows Have to Be Impact-Rated in Florida?
In a debris region, the general answer is yes. Replacement windows and doors follow the same opening protection rule as new construction, which means impact-rated products or approved shutters. Older homes have one important exception, often called the 25 percent rule.
The 25 percent rule comes from Section 707.4 of the Florida Building Code, Existing Building. It applies to one- and two-family homes in a debris region that were built under codes other than the Florida Building Code, which generally means homes built before the statewide code took effect in 2002.
For these homes, you can replace windows, glass entry doors, sliding glass doors, and skylights without opening protection, as long as the replaced glass does not exceed 25 percent of the home’s total glass area within any 12-month period. The new units must still meet the required wind-pressure design requirements.
A few details catch homeowners off guard:
Your building department decides whether your home qualifies, usually by checking the original permit date.
Replacing windows and doors generally requires a building permit in Florida. The permit lets the building department confirm that each product is approved and installed correctly, and it creates a record that helps with future inspections, insurance, and resale.
Florida also simplified part of the process. A 2024 state law, effective January 1, 2025, says sealed drawings from a design professional are not required for replacement windows, doors, or garage doors when three conditions are met: the products are installed according to the manufacturer’s instructions for the wind zone, they meet current design pressure requirements, and a copy of those instructions is submitted with the permit application.
Local forms show what reviewers check. Manatee County’s door, window, and shutter disclosure form asks the contractor to mark each replacement as impact or non-impact and to list its Florida Product Approval or Miami-Dade NOA number.
Not Sure Whether Your Home Falls Under the 25 Percent Rule?
Mr. Build checks your home’s wind zone, permit history, and design pressure requirements during a free in-home consultation, then handles the permit for you. Schedule your free estimate or call (941) 746-5838.
Both do. The code accepts either impact-resistant glazing or an approved impact-resistant covering over standard windows. The difference is how they protect.
Impact windows are always in place, so you don’t have to close anything before a storm. That helps if you travel or cannot put up protection quickly. Shutters, storm panels, and hurricane screens protect an opening only when closed or installed, so someone must deploy them before the storm arrives.
Either option can be documented as opening protection during a wind mitigation inspection, which insurers use when applying windstorm discounts. For a side-by-side look, read our guide to hurricane shutters vs. impact windows.
Shutters follow the same opening protection rule as impact windows. In a debris region, accordion shutters, storm panels, and hurricane screens must carry Florida Product Approval or a Miami-Dade NOA and be installed according to that approval. Mr. Build installs accordion shutters, storm panels, and hurricane screens as part of our full range of storm protection options.
Note: The markings and approval number shown are for illustration only and are not an actual or verified product label or rating.
Start with what you can see. The Florida Building Code requires exterior windows and doors to carry a permanent label, marking, or etching that traces back to the manufacturer and product. Impact windows use laminated glass, which has a plastic layer between the glass panes so the glass stays in the frame when it cracks.
Visual clues are a starting point, not proof. Labels fade, stickers get removed, and some standard windows look similar. To confirm, check the records below.
Both show that a product passed testing for use in Florida. Florida Product Approval is the statewide approval system. A Miami-Dade NOA (Notice of Acceptance) reflects the testing required in the High Velocity Hurricane Zone. Outside the HVHZ, either approval can be used when the product’s ratings match the home’s design pressure and impact requirements.
Florida updates its building code every three years. The 9th Edition (2026) Florida Building Code takes effect December 31, 2026, and it updates the 8th Edition using changes from the 2024 International Codes. Projects permitted before that date generally follow the 8th Edition. Projects permitted after it must comply with the 9th.
Two points to watch for window projects. First, Florida’s product approval system is moving approvals over to the new edition, so ask your contractor to confirm that the windows on your quote are approved under the code that will apply when your permit is filed. Second, Florida law tied the definition of a wind-borne debris region to the 7th Edition (2020) residential code until the 9th Edition is adopted, and the Florida Building Commission has studied how the newer ASCE 7-22 wind standard defines these regions. If your project will be permitted after December 31, 2026, confirm your home’s debris region status under the new edition.
Only in certain areas. In wind-borne debris regions and the High Velocity Hurricane Zone, every glazed opening must be impact-resistant or covered by approved shutters or panels. Impact windows, often called hurricane windows, are one way to comply. Homes outside those areas still need windows rated for local wind pressure, but impact glass is optional.
The 25 percent rule lets owners of older one- and two-family homes in a debris region replace up to 25 percent of the home’s total glass area within any 12-month period without impact protection. It applies only to homes built before the Florida Building Code took effect, and new windows must still meet wind pressure requirements.
Yes. Replacing windows or doors generally requires a building permit from your city or county, and the application lists each product’s Florida Product Approval or NOA number. Since January 1, 2025, sealed engineering drawings aren’t required for replacements installed per the manufacturer’s instructions that meet current design pressure requirements.
Yes, under Florida’s owner-builder exemption for a one- or two-family home used as your own residence. You must personally sign the permit application and disclosure statement, supervise the work, and pass inspections. Errors can put permits and manufacturer warranties at risk, so most homeowners hire a licensed contractor.
They can. Florida law requires insurers to provide discounts, credits, or other rate differentials for proven windstorm mitigation features, including opening protection. You typically need a wind mitigation inspection to document impact windows or shutters. Savings vary by insurer and policy, so ask your agent after installation.
Florida offers grants, not rebates, through the My Safe Florida Home program. After a free wind mitigation inspection, eligible homeowners can receive up to $10,000, with the state paying $2 for every $1 they spend. Qualifying low-income homeowners may receive up to $10,000 with no match. Check mysafeflhome.com for current funding status.
Florida’s impact window rules come down to details: your address, your wind zone, your home’s age, and how much glass you plan to replace. Getting those details right before you order windows protects your budget, your permit, and your home.
Mr. Build has served Bradenton, Sarasota, and Southwest Florida homeowners since 1976. Owner Joe Long is a Florida Certified General Contractor (CGC1527282) with a bachelor’s degree in mechanical engineering and more than 25 years of construction experience. Our team handles permits, product approvals, and installation, and we are a My Safe Florida Home contractor. Impact windows also bring long-term savings beyond code compliance.
Find Out What Your Home Needs
Get a free in-home estimate from Mr. Build. We will confirm your wind zone, review your permit history, and recommend code-compliant impact windows or shutters for your home. Request your free estimate or call (941) 746-5838
