Impact windows are one of the most significant investments a Florida homeowner can make, and one of the most confusing to price. The range is wide, the terminology is technical, and the sales tactics in this industry can be aggressive. This guide gives you the real numbers, explains what drives the price, and tells you what to watch out for before you sign anything.
What Impact Windows Actually Cost in Florida
The most common question is straightforward: what does a single impact window replacement cost, installed? For a standard single-hung or horizontal roller window, the most common residential configurations, expect to pay $1,200 to $1,800 per window, fully installed. That number includes the window itself, labor, and all finishing work. It does not include the permit, which is typically a separate flat fee (more on that below).
Sliding glass doors run significantly higher. A standard two-panel impact sliding glass door runs $5,500 to $9,500 installed, depending on the series and glass package selected.
These are not material-only numbers. A contractor who quotes you $400 per window is quoting you the glass unit alone. By the time you add labor, permits, trim, sealant, and finishing, that number looks very different. The only apples-to-apples comparison is the full installed price.
| Opening Type | Typical Installed Price Range |
|---|---|
| Single-hung or horizontal roller window | $1,200 – $1,800 |
| Sliding glass door (2-panel) | $5,500 – $9,500 |
| Permit fee (varies by municipality) | ~$350 |
What Drives the Price
Window size and configuration. Larger openings require more material and more labor. A picture window above a staircase costs more than a standard bedroom window. Pricing is by unit, measured onsite, there is no reliable way to quote accurately from a floor plan or a phone conversation.
Glass package. Not all impact glass is equal. Florida uses design pressure ratings to classify impact windows, Category 3 windows handle standard hurricane conditions, while Category 5 windows are built for the highest wind loads. Category 5 glass has a sacrificial outer layer, an impact-resistant inner layer, and argon gas sealed between them. Low-E coating and argon gas should be standard on any impact window you buy in Florida, if a contractor is offering them as upgrades, that is worth noting.
Frame material. Vinyl frames offer better thermal performance and lower maintenance. Aluminum frames are more common in commercial applications and in older Florida homes where the opening dimensions require it. Both are available in impact configurations.
Series and brand. The three brands most commonly installed in Southwest Florida, EAS, PGT, and CWS, each have product lines at different performance and price points. EAS's 176 Bertha, for example, is an HVHZ-certified vinyl line rated to 120 psf design pressure with a lifetime warranty on both the frame and the glass. PGT's 8100 series sits at the top of the slider range. The brand matters less than the design pressure rating and the Florida Product Approval number, which tells you the window has been tested and certified for your wind zone.
Permit and inspection. Florida requires a permit for impact window replacement. The permit fee is typically around $350 and varies by municipality. A reputable contractor handles the permit process and inspection on your behalf, the product approval numbers are submitted to the county as part of the permit, which also creates the documentation you will need for your insurance discount.
What Should Be Included in Your Quote
A complete impact window replacement quote should include the window unit, labor, permit, removal and disposal of the existing windows, stucco patching if needed, and interior and exterior trim installation. If any of those items are listed as separate line items or not mentioned at all, ask specifically. A homeowner who accepts a low per-window price and then gets billed separately for trim, patching, and disposal ends up paying more than a homeowner who got a complete price upfront.
One installation detail worth asking about: when your home has wood frame construction, the correct installation method for most openings is a nail fin window, the installer removes the exterior trim, sets the window into the rough opening with the nail fin, and reinstalls the trim. Some contractors skip this step and install a flange window instead because it is faster and appears cheaper. It is not the more weather-resistant option. Ask your contractor which method they use and why.
The Insurance Discount
Florida law requires insurers to offer discounts for homes with verified wind-resistant features, including impact windows. The discount applies to the windstorm portion of your homeowners insurance premium, not the full policy, and typically ranges from 25% to 45% off that portion, which translates to roughly $300 to $2,000 or more per year depending on your home, your insurer, and your current premium.
The discount is documented through a Wind Mitigation Inspection using the OIR-B1-1802 form, which was updated in April 2026. A licensed inspector visits your home after installation, verifies the impact-rated openings, and completes the form for your insurer. The inspector is hired by the homeowner and typically charges $75 to $150. The product approval numbers your contractor submitted to the county for the permit are the same numbers the inspector needs, so if your contractor handled the permit properly, the documentation is already on file.
What to Watch Out For
Quotes without a site visit. Impact windows are priced by unit, measured onsite. Any quote given over the phone or from a floor plan is an estimate at best and a lowball to get you to sign at worst.
Material-only pricing. A price that does not include labor, permit, and finishing is not a real price. Ask explicitly: is this the full installed price, including permit, removal, trim, and patching?
Flange windows in wood frame homes. As described above, this is a shortcut that compromises the weather seal. Ask which window configuration your home requires and whether the contractor installs nail fin windows when appropriate.
Assignment of benefits. In the roofing industry, AOBs are a well-known problem. They exist in the window industry too. Do not sign any document that transfers your insurance claim rights to the contractor. You should remain the beneficiary of your own claim.
No permit. An unpermitted impact window installation does not qualify for the insurance discount, may not pass a home inspection when you sell, and may not be covered under your homeowners policy if it is ever damaged. The permit is not optional.
The Minimum and the Timeline
Most reputable impact window contractors work with a two-window minimum. A typical residential installation of two to ten windows is completed in a single day. A contractor who removes more windows than they can install in one day is leaving your home open overnight, that is not an acceptable practice.
*West Coast Exteriors installs impact windows and sliding glass doors across Southwest Florida, including Sarasota, Bradenton, Holmes Beach, Anna Maria Island, Siesta Key, Longboat Key, Venice, and surrounding areas. All installations include permit, removal, trim, and stucco patching. Free estimates available at 941-479-1776.*