The short version
In Miami-Dade and Broward, a window is a structural part of the house. The Florida Building Code puts both counties in the High-Velocity Hurricane Zone (HVHZ), where every exterior opening has to resist flying debris and the pressure swings of a hurricane, and every product has to prove it with a Miami-Dade Notice of Acceptance (NOA). That is why impact windows cost what they cost, why they earn one of the largest insurance credits a Florida homeowner can get, and why the state lets you pay for them on your property-tax bill.
This guide covers what the code actually requires for openings, what moves the price up or down from one quote to the next, how the opening-protection credit on the wind-mitigation form works, PACE versus a consumer loan, how to look up the NOA on any window you are offered, and what the timeline looks like from measurement to final inspection.
What the HVHZ requires for openings
All of Miami-Dade and Broward sit inside the windborne debris region of the Florida Building Code, and inside the stricter HVHZ provisions on top of that. Under the code, exterior glazed openings in that region must be protected: either the glass itself is impact-rated, or the opening is covered by an approved shutter or panel system. That applies to new construction and, under the Florida Building Code's existing-building provisions, to replacement windows and doors too. A plain non-impact window with nothing to protect it is not an option on a permitted replacement in the HVHZ.
Impact products earn their rating through Miami-Dade's own test protocols. The large-missile test (TAS 201) fires a nine-pound 2×4 at the glass at about 50 feet per second, roughly 34 mph, and the unit then has to survive thousands of positive and negative pressure cycles (TAS 203) without the glass leaving the frame. Openings more than 30 feet above grade are tested with small missiles instead, which is why a high-rise unit and a one-story home can be sold different products for the same size opening. Static pressure (TAS 202) sets the design-pressure rating in pounds per square foot (PSF) printed on the NOA. The code books are published by the Florida Building Commission at floridabuilding.org.
| Option | Meets the code? | Day-to-day | Insurance and resale |
|---|---|---|---|
| Impact windows and doors (laminated glass in a rated frame) | Yes, on its own, when every product carries a current Miami-Dade NOA | Nothing to deploy; Low-E laminated glass also cuts heat, UV fading and street noise, and the house stays lit during a storm | Qualifies for the opening-protection credit when every opening is covered; expected by South Florida buyers |
| Non-impact windows plus approved shutters or panels | Yes, if the shutter system has its own NOA and covers every opening | Panels have to be put up before a storm and taken down after; a closed house is dark; storage space needed | Can earn the same credit class if every opening, including doors, is covered by rated protection |
| Non-impact windows with no protection | No; not permitted as a replacement in the HVHZ | Cheapest glass, but the house is open to debris | No credit; many carriers look hard at unprotected openings on older homes |
What drives the price of impact windows in Miami
Two homes with the same number of windows can get quotes that differ by thousands of dollars, and the difference usually comes down to a handful of specifications rather than to the installer's markup. Installed, a typical South Florida impact window tends to land somewhere from under a thousand to a few thousand dollars per opening depending on its size and glass, and sliding glass doors run several thousand per opening, so a whole house is usually a five-figure project. A real quote is written per opening, and these are the lines that move it:
Size, count and type of opening
Glass is priced by the square foot and so is the aluminum extrusion around it, so a 6-foot-wide sliding window costs more than two small single-hungs. Doors cost more again: a two-panel sliding glass door is a large sheet of laminated glass on rollers that have to carry it for decades, and a French door needs multi-point locks. Counting openings and measuring them is the first thing a good estimator does, which is why a price given over the phone is a guess.
Design pressure and floor height
Every opening is sized against the wind pressure at its spot on the building, and pressure rises with height and near corners. A one-story home needs a far lower PSF rating than the upper floors of a tower, and a product rated for the tower costs more. On a single-family home in Miami-Dade the rating is set by the engineer's or manufacturer's pressure chart for your height and exposure; in a condo it is set per floor, which we cover in detail on the Aventura impact windows page.
Glass make-up
The basic impact unit is laminated glass: two panes bonded to a plastic interlayer that holds the shards when the glass breaks. Insulated-laminated glass adds a sealed air space and a third pane for more heat and sound insulation, at a higher price and a thicker, heavier unit. Low-E coatings and gray or bronze tints are upgrades on either. For most Miami homes, laminated Low-E glass is the value choice: it handles the sun and the noise and keeps the unit lighter; insulated-laminated earns its cost on big west-facing glass and in rooms you cool hard.
Frame finish, color and what the wall is made of
White and bronze aluminum are usually standard; custom powder-coat colors and some condo-required finishes add a per-opening charge. The wall matters too: most Miami-Dade and Broward homes are concrete block (CBS), and the NOA spells out the anchor type and spacing into block, which is a clean, fast installation. Wood-frame walls, pressure-treated bucks that need replacing, and openings being resized or combined add labor, stucco work and sometimes an engineer's letter.
Permit, disposal and the small lines
A window and door replacement is a permitted job in every Miami-Dade and Broward city and in the unincorporated county. Fees are set by each building department, generally figured from the job value or the number of openings, and for a single-family package they typically come to a few hundred dollars; the permit, the NOA package, the final inspection, debris removal and interior stucco or drywall patching should all be lines on the estimate. If one quote is far below the others, check which of those lines it leaves out.
Insurance: the opening-protection credit
Florida law (Statute 627.0629) requires insurers to offer premium discounts for construction features that reduce hurricane losses, and the way those features are documented is the Uniform Mitigation Verification Inspection Form, OIR-B1-1802. The form was revised effective April 1, 2026, with updated wording for the opening-protection section among others; inspections on or after that date use the new version, and the Office of Insurance Regulation says the revision did not change the credits available. Resources and the form itself are on the Florida OIR wind mitigation page.
The point homeowners most often miss is that the credit is graded by the least-protected opening. "All openings" means windows, entry doors, sliding doors, garage doors and skylights; one unrated door or an uncovered garage door drops the whole house into a lower class. That is why we quote the doors with the windows and ask about the garage door before we talk about the credit. On a Florida insurer's published schedule, hurricane-rated protection on every opening ranges from 39% to 87% off the hurricane portion of the premium depending on the rest of the house; our insurance savings calculator walks through that schedule. After the final inspection we provide the permit, NOAs and photos the wind-mitigation inspector needs. For a condo unit, how much the HO-6 carrier credits depends on the policy, so ask your agent with the documents in hand.
Paying for it: PACE versus a consumer loan
Florida's PACE statute (Section 163.08, Florida Statutes) lets local governments finance "wind resistance" improvements, which include impact-resistant windows and doors, through a non-ad valorem assessment repaid on the property-tax bill. That is the program behind "$0 down" impact window offers in Miami-Dade and Broward. Proper Roofing is an approved PACE contractor and also offers GoodLeap and Service Finance consumer loans; both paths are compared on our financing page. The statute text is at flsenate.gov.
| PACE (Florida PACE / Renew Financial) | GoodLeap or Service Finance loan | |
|---|---|---|
| Down payment | $0 | $0 |
| Approval based on | Home equity and property-tax history; no minimum credit score | Credit profile; soft pull first, hard inquiry only if you accept |
| Rate and term | Fixed rate set by the PACE provider at signing; 10–20 year terms | Fixed rates typically from 2.99% to 13.45% APR; 5–20 year terms |
| How you repay | As an assessment on the property-tax bill (usually through escrow) | Monthly payment to the lender |
| What it covers | Hurricane-hardening and energy work: impact windows and doors, roofs; not kitchens or baths | Any project we do, including interiors |
| Selling the house | The assessment stays with the property; buyer's lender may require payoff at closing | Loan is yours; pay off any time, no prepayment penalty |
How to check the NOA on any window you are offered
A Miami-Dade Notice of Acceptance is an eight-digit number (the first six digits are the issue date) tied to a multi-page PDF from the county's Product Control section. It names the manufacturer and the exact product, the maximum size the unit was tested at, the design pressures it passed, the glass make-up that was tested, the anchoring into block or wood, and an expiration date. Ask for the NOA number of every product on your estimate, windows and doors alike, then look each one up in the Product Control search on miamidade.gov.
- Is it current? Expired approvals cannot be permitted.
- Does the product match? The series name and the glass make-up on the NOA must be what is on your quote, not a lower-cost sibling.
- Does the size fit? Each NOA lists the largest tested width and height; an opening bigger than that needs a different product or a mullion.
- Is the design pressure enough? The PSF on the NOA has to meet or beat the pressure calculated for your opening.
- Does the anchoring match your wall? The NOA shows the fastener and spacing for concrete block versus wood; your installer should be able to point to the line they will follow.
The systems we install are made in Miami by Mr. Glass and carry current NOAs; the figures below are from the manufacturer's published specifications, and the names and specs belong to Mr. Glass Doors & Windows Manufacturing LLC.
| System | Opening | Tested size | Design pressure |
|---|---|---|---|
| MG-200 | Single-hung window | Up to 53⅛″ × 96″ | 140 PSF |
| MG-300 | Horizontal sliding window | Up to 127″ × 74″ | 140 PSF |
| MG-1000 | Sliding glass door, high-rise | Panels up to 48″ × 144″ | +120 / −140 PSF |
| MG-1500 | Sliding glass door, residential | Panels up to 48″ × 108″ | +60 / −80 PSF |
| MG-3000 | French and swing doors | Up to 156″ × 98″ | ±80 PSF |
Timeline: from measurement to final inspection
Impact windows are built to order, so the calendar has three parts. First, the measure, the written quote and the permit: the application goes to your city's building department (or the county for unincorporated addresses) with the NOA for every product and, for a condo, the association's approval. Second, manufacturing, typically 4–8 weeks from the day the order is placed, longer in the run-up to hurricane season. Third, installation: old units out, new units anchored per the NOA, stucco and interior finish patched, usually two to four days for a whole house or condo unit and less for a small home. The job ends with the building department's final inspection and the wind-mitigation documents.
Atlantic hurricane season runs June 1 through November 30, and lead times stretch as it approaches. Ordering in the winter or early spring is the practical way to have the windows in, inspected and on your policy before the season starts. Our impact windows and doors page lists the systems and the install process; to get a per-opening quote, book a free measurement.
Questions worth asking before you sign
- Which NOA number goes with each opening, and is it current? The answer should be a list, not a shrug.
- What design pressure was each opening sized to?
- Is laminated or insulated-laminated glass quoted, and is Low-E included?
- Are the doors and the garage door in the quote? If not, ask what that does to the insurance credit.
- Who pulls the permit and who schedules the final inspection? It should be the contractor, under a license you can look up at myfloridalicense.com.
- Is the last payment tied to the approved final inspection?