Yes, you need a permit to replace windows in Florida. The Florida Building Code treats a full window unit replacement as permitted work, even when the new window is the same size and style as the one coming out. That rule holds whether you’re swapping a single window or every opening in the house, and it applies statewide because proper window installation is a life-safety issue in a state built around hurricane exposure.
The only common exception is a minor glass repair. Replacing a single cracked pane inside an existing frame counts as maintenance, not construction. Once you pull the frame, change the opening size, switch frame materials, or upgrade to impact-rated glass, you’re back in permit territory.
Why the Permit Exists
The building department needs to verify two things: that the product you bought is rated for your specific wind zone, and that it’s installed correctly. Florida’s wind speeds are high enough that every replacement window must carry a Design Pressure (DP) rating appropriate for your address. Your local building department can tell you what that rating needs to be. Buying windows that meet generic “hurricane” marketing claims but fall short of the actual engineering requirement for your location is one of the most common reasons permit applications stall.
The 25% Rule
Florida enforces what contractors call the 25% rule. If you replace more than 25% of a home’s glazed openings within a 12-month period, every new window must meet the current edition of the Florida Building Code. That includes impact-resistance requirements if you’re in a wind-borne debris region and current energy-efficiency standards.
Replacing fewer than 25% still triggers a permit. The threshold matters because you can’t phase a large project across several small permits to avoid current code. Cross 25% in a rolling year and the whole project has to comply with today’s standards.
Wind-Borne Debris Regions
Florida’s most consequential window rule is the impact-resistance mandate for homes inside a wind-borne debris region. The Florida Building Code defines this as any area where the ultimate design wind speed reaches 140 mph or higher, plus coastal areas within one mile of the mean high-water line where the wind speed hits 130 mph or higher under Exposure D conditions.1Florida Building Code. Revised Definition for the Wind-Borne Debris Region In practice, this covers most of the coastline and large swaths of South Florida, including all of Miami-Dade and Broward counties.
Windows in these areas must withstand impacts from flying debris and extreme wind pressures. Every replacement window needs either a Florida Product Approval (FPA) number or a Miami-Dade County Notice of Acceptance (NOA).2Florida Department of Business & Professional Regulation. Product or Application Search Inspectors look for that number on the product label and in your permit paperwork. You can verify any window’s approval status through the state’s online product search before purchasing.
What You’ll Need to Submit
A complete permit application for window replacement generally includes:
- The permit application form itself, which most Florida jurisdictions now accept online.
- Product approval sheets showing the Florida Product Approval number for each window. This is non-negotiable regardless of project size.
- Plans or drawings. For same-size replacements in the same openings, some departments waive full architectural plans. If you’re changing the size of any opening or making structural modifications, you’ll need plans signed and sealed by a Florida-licensed architect or engineer.
- Contractor credentials if a licensed contractor is doing the work: current license and insurance.
- An owner-builder affidavit if you’re doing the work yourself. Florida law requires you to personally appear, sign the permit application, and complete an owner-builder disclosure acknowledging your responsibility for code compliance, workers’ compensation obligations, and the financial risks of acting as your own contractor.3The Florida Legislature. Florida Statutes 489.103 – Exemptions
Notice of Commencement
For any window project where the direct contract exceeds $5,000, you must file a Notice of Commencement with the county recorder’s office before the first inspection.4The Florida Legislature. Florida Statutes 713.135 – Construction Lien Law; Building Permits; Notice of Commencement A copy of the recorded notice, or at minimum the clerk’s instrument number, must be filed with the building department. Without it, the department cannot approve any inspections. A whole-house replacement with impact-rated products will clear that $5,000 threshold comfortably.
HOA Approval
If your home is in a community governed by a homeowners association, you likely need architectural review approval before applying for the building permit. Under Florida law, an HOA’s authority to regulate the appearance of structures on your property must be specifically stated or reasonably inferred from the declaration of covenants. The board is required to adopt hurricane protection specifications, including color and style guidelines for impact-resistant windows, and must apply those standards uniformly. If your covenants offer specific options for materials or styles, the board cannot restrict you from selecting among those options.5The Florida Legislature. Florida Statutes 720.3035 – Architectural Control Covenants; Parcel Owner Improvements; Rights and Privileges
Fees and Processing Time
Fees vary by jurisdiction. Some departments charge a base fee for the first opening plus a per-opening fee for each additional window. Others fold plan review fees and state surcharges into a flat rate. Expect somewhere in the range of $50 to $150 for a straightforward same-size replacement, with whole-house projects running higher.
Florida law sets firm deadlines on how quickly your local building department must act. For residential structures under 7,500 square feet, the department must approve, approve with conditions, or deny a complete application within 30 business days. Larger homes of 7,500 square feet or more get a 60-business-day window. If the department requests corrections, you have 10 business days to resubmit, and the department then has another 10 business days to issue a final decision.6The Florida Legislature. Florida Statutes 553.792 – Building Permit Application to Local Government
What Happens If You Skip the Permit
Local code enforcement can issue a stop-work order the moment they discover unpermitted construction. Each county or municipality can levy civil penalties of up to $2,000 per violation through their code enforcement officers.7Florida Senate. Florida Statutes 489.127 – Prohibitions; Penalties You’ll also need to apply for an after-the-fact permit, which typically costs a multiple of the standard fee. The exact multiplier varies: some jurisdictions charge double, others charge up to four times the regular fee if the current homeowner did the work.
The indirect costs tend to hurt more. An after-the-fact permit still requires an inspection, and if the windows are already installed with trim and stucco covering the flanges, the inspector can’t verify fasteners, flashing, or shim spacing. At that point, the building department may require destructive testing or an engineer’s certification letter to forensically verify that the concealed work meets code. If the installation fails, you could be looking at removal and reinstallation.
Home Sales and Insurance Consequences
Unpermitted window work creates problems that outlast the construction. Florida law requires sellers to disclose known material defects, and unpermitted improvements fall into that category. A buyer’s inspector or title company will often catch the discrepancy by comparing permit records to the home’s current condition, which can derail a sale or force a last-minute price reduction to cover retroactive permitting.
Insurance is the other pinch point. Properly permitted and inspected impact-rated windows can earn meaningful discounts on your homeowner’s premium through Florida’s wind mitigation credit system. Homes built before the 2001 Florida Building Code can see estimated premium reductions of up to 44% for qualifying hurricane protection on all openings; homes built under the 2001 code or later can receive around 6%, since much of the wind resistance is already built in.8Florida Division of Emergency Management. Wind Mitigation Booklet Without a closed permit and passing inspection, you have no documentation to support the discount, and your insurer may deny a wind-damage claim entirely if the windows were installed without a permit.