Florida Hurricane Window Requirements 2026: Code, NOA & HVHZ Guide
Florida has the most stringent hurricane protection building codes in the United States. Whether you're replacing one window or the entire house, you need to know what the law requires for your county — and what happens if you skip the permit. This guide covers every requirement in plain English.
2026 Code Status
The 8th Edition Florida Building Code is currently in effect (since December 31, 2023). The 9th Edition takes effect December 31, 2026 with expanded WBDR coverage. All windows installed before that date are governed by the 8th Edition requirements shown below.
The Florida Code Framework: HVHZ vs. WBDR
Florida divides the state into two key hurricane protection zones. Which zone your home is in determines what product certification is required:
High Velocity Hurricane Zone (HVHZ)
Covers: All of Miami-Dade County + coastal Broward County
- • Miami-Dade NOA (Notice of Acceptance) required
- • Large missile impact required (9-lb 2×4 at 50 ft/s)
- • Cyclic pressure testing required (TAS 201/202/203)
- • Most stringent standards in the US
- • Florida Product Approval (FL#) alone is NOT accepted
Wind-Borne Debris Region (WBDR)
Covers: Inland Broward, all of Palm Beach, most coastal Florida
- • Florida Product Approval (FL#) required — NOA also accepted
- • Impact-rated products OR approved shutters qualify
- • Large or small missile depending on wind zone calculation
- • 9th Edition (Dec 31, 2026) will expand WBDR boundaries
- • Palm Beach County: FL# or NOA accepted (NOA not mandatory)
Requirements by County: South Florida 2026
| County / Zone | Zone Type | Required Certification | Design Wind Speed | Missile Level |
|---|---|---|---|---|
| Miami-Dade (HVHZ — all areas) | HVHZ | Miami-Dade NOA required | 170–185 mph (coastal) | Large (9-lb 2×4) |
| Broward (coastal — HVHZ) | HVHZ | Miami-Dade NOA required | 155–175 mph | Large (9-lb 2×4) |
| Broward (inland — non-HVHZ) | WBDR | FL# or NOA | 145–160 mph | Small (2-lb 2×4 at 35 mph) |
| Palm Beach (coastal — WBDR) | WBDR | FL# or NOA | 145–165 mph | Small or Large per site |
| Palm Beach (inland — limited WBDR) | Varies | FL# (NOA also accepted) | 135–150 mph | Per site engineering |
Wind speeds are 3-second peak gusts per ASCE 7 risk category II. Exact design speed varies by specific location within each county. Your contractor's engineer determines the applicable speed for your site.
What Makes an Impact Window "Code Compliant" in Florida?
For a window replacement to pass inspection in Florida, eight conditions must all be true:
Current, valid Miami-Dade NOA number
Mandatory in all HVHZ locations (all of Miami-Dade, coastal Broward)
Current Florida Product Approval (FL#)
Accepted in non-HVHZ counties; NOA also accepted everywhere FL# is required
Laminated glass with PVB or SGP interlayer
Standard impact glass — must not be replaced with tempered-only glass
Large missile impact testing
9-lb 2×4 at 50 ft/s — required for HVHZ. Small missile (2-lb) accepted in some non-HVHZ zones
Cyclic wind pressure testing (TAS 202)
Confirms the frame holds up under repeated gusts, not just single impact
Florida Building Code requires installation by a licensed contractor
State law requires the work to be performed under a state-certified contractor license (CGC, CGR, or CW-specialty). Homeowners filing as owner-builders are the only exception.
Permitted before work starts
Building permit required for any window replacement in Florida
Passes final county inspection
Inspector verifies product approval, installation method, flashing and sealant
The 25% Rule: When Replacing Windows Triggers Full Compliance
Critical Rule Most Homeowners Miss
If you replace more than 25% of your home's total window/door area in any 12-month rolling period, the Florida Building Code requires that ALL remaining openings in the structure be brought into compliance with current hurricane protection standards.
This means: replacing 3 of 10 windows (30% of your window area) in one year could legally trigger a requirement to impact-protect or shutter every other window, door, skylight, and garage door in the home.
How to avoid triggering it: If you're phasing a replacement project, keep each 12-month phase below 25% of total opening area. Vieser Construction calculates this before any phased project begins.
Full guide: Florida 25% Window Rule — How to Calculate Your Threshold →
Miami-Dade NOA vs. Florida Product Approval: Key Differences
| Factor | Miami-Dade NOA | Florida Product Approval (FL#) |
|---|---|---|
| Testing body | Miami-Dade County BCCO | Florida Dept of Business & Professional Regulation |
| Where required | All of Miami-Dade; all HVHZ | All of Florida (non-HVHZ) |
| Accepted in Miami-Dade HVHZ? | ✅ Yes | ❌ No — NOA required |
| Accepted in Palm Beach? | ✅ Yes (preferred) | ✅ Yes |
| Missile test | Large missile — 9 lb 2×4 at 50 ft/s | Varies — large or small depending on zone |
| Wind speed tested | Up to 200+ mph | Per local wind zone, typically 130–160 mph |
| Brands carrying NOA | PGT, ESW, Mr. Glass (all brands we carry) | Same brands; NOA also includes FL# automatically |
Bottom line: All windows from Vieser Construction (PGT, ESW, Mr. Glass) carry Miami-Dade NOA — the highest certification available. They are accepted in every South Florida county without exception.
The Permit Requirement: What It Involves
Every window replacement in Florida requires a building permit — no exceptions for residential projects. Here is what the permit process involves:
Permit application submitted
Includes NOA/FL# numbers, installation drawings, property information. Vieser Construction coordinates the complete permitting process, including the required documentation, engineering and permit submission.
County reviews application
Broward: 1–3 business days (e-permit). Miami-Dade: 5–10 business days. Palm Beach: 2–5 business days.
Permit issued
Work may begin after permit is issued and posted at job site.
Installation
Windows installed per the approved NOA installation method — critical for compliance.
Rough-in inspection (if required)
Some counties require mid-installation inspection before closing openings.
Final inspection
Building inspector verifies product approval numbers, installation method, and sealant application.
Permit closed
Only after final inspection passes. Required for wind mitigation inspection and insurance discount.
Penalties for Installing Without a Permit
Florida code enforcement takes unpermitted window work seriously. Here is what you're risking:
Fines
$500–$5,000+ per violation from county code enforcement. Can compound daily.
Stop-work order
Project halted mid-installation. No additional work allowed until resolved.
Required removal
Court can order non-compliant products removed at homeowner's expense — even if labor cost exceeds window cost.
Insurance denial
Insurers verify permit status during hurricane damage claims. Unpermitted windows = claim denied.
Wind mitigation void
Unpermitted windows don't qualify for wind mitigation reports — you lose the 25–45% insurance discount.
Title encumbrance
Open permits and code violations appear on title searches. Can delay or kill a home sale.
Lender issues
Mortgage lenders and refinance appraisers flag unpermitted work as material defects.
Vieser Construction coordinates the complete permitting process for every installation, including required documentation, engineering, and permit submission. We do not do unpermitted work — period. Permits protect you, not us.
What Changes on December 31, 2026: The 9th Edition
The 9th Edition Florida Building Code takes effect December 31, 2026. Key changes for homeowners:
- WBDR expansion: More inland areas will fall into the Wind-Borne Debris Region, meaning homes in those areas will require impact protection or approved shutters for new construction and major renovations after December 31, 2026.
- Multifamily buildings (3+ floors): New requirements from HB 911 for opening protection in residential mid-rise buildings.
- Existing homes: Not retroactively required to upgrade, but any new window installation after the effective date in a newly-designated WBDR area must comply with 9th Edition.
- Strategic timing: Installing before December 31, 2026 means your project is governed by the current (8th Edition) code. Post-deadline installations in expanded WBDR areas must meet new requirements.
Full details: Florida Building Code 9th Edition 2026: Impact Window Changes →
Frequently Asked Questions
Are impact windows required by law in Florida?
Impact windows are not universally required for all existing homes, but any replacement window installed in Florida must meet the Florida Building Code's wind resistance requirements. In Miami-Dade County's High Velocity Hurricane Zone (HVHZ), those requirements effectively mandate impact-rated products — nothing else passes. In Broward and Palm Beach counties, large missile impact-rated windows (with NOA or FL# approval) are the standard compliant product for residential replacement.
What is the difference between Miami-Dade NOA and Florida Product Approval?
Miami-Dade NOA (Notice of Acceptance) is the stricter certification — products are tested to HVHZ standards including large missile impact and cyclic wind pressure at speeds up to 200+ mph. Florida Product Approval (FL#) is the statewide certification required in all other counties. NOA is accepted everywhere FL# is required; FL# alone is not accepted in Miami-Dade HVHZ. All three brands Vieser Construction installs (PGT, ESW, Mr. Glass) carry Miami-Dade NOA.
What is the 25% rule for impact windows in Florida?
Under the Florida Building Code, if you replace more than 25% of your home's total window and door area in any rolling 12-month period, the entire building must be brought into full compliance with the current code for impact protection. This means replacing or shuttering all remaining openings. Staying below 25% in any 12-month period avoids triggering this whole-structure requirement.
What happens if I install windows without a permit in Florida?
Consequences include fines of $500–$5,000+ per violation from county code enforcement, stop-work orders halting your project, required removal of non-compliant products at your expense, insurance claim denials for hurricane damage (insurers verify permit status), and title encumbrances that surface during home sales and can block or delay closings.
Does Florida's 9th Edition Building Code affect impact window requirements?
The 9th Edition Florida Building Code takes effect December 31, 2026. The most significant change for homeowners: the Wind-Borne Debris Region (WBDR) will expand to include areas currently outside it, meaning some previously exempt homes will need impact protection or approved shutters for new construction or major remodels. Existing installed windows are not retroactively affected, but any new installation after December 31, 2026 in newly-designated WBDR areas must meet impact standards.
What wind speed do South Florida impact windows need to withstand?
Design wind speeds (3-second gust) in South Florida: Miami-Dade County: 170–185 mph (coastal), 160–175 mph (inland). Broward County: 155–175 mph (coastal), 145–160 mph (inland). Palm Beach County: 145–165 mph (coastal), 135–150 mph (inland). Impact windows are certified to specific DP (Design Pressure) ratings that correspond to these speeds. A window with DP+50 is rated for approximately 130+ mph.