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To compare impact window quotes, line them up opening by opening and check that each one lists the same things: the product and its approval number, the design pressure rating, the glass, the permit, the finish work, the payment schedule and both warranties. The lowest total means little until every quote covers the same scope.
This checklist shows what a complete quote must include, which gaps cost you later, and which red flags should rule a quote out. For the bigger picture on products, ratings and county rules, see our complete guide to impact windows in South Florida.
Why Impact Window Quotes Differ So Much
Impact window quotes for the same house often differ because each company is pricing a different job. One quote may include the permit, stucco repair and debris removal; another may leave them out and add them later as change orders.
The most common reasons two totals do not match:
- Different products: brand, product line, frame material and glass package all change the price.
- Different ratings: a product with a higher design pressure rating, or one approved for the High-Velocity Hurricane Zone, can cost more.
- Different opening counts: one company may have quoted every window, another only the front of the house, or left out a sliding door.
- Different scope: permit, engineering, stucco, interior trim, paint and disposal are included in some quotes and missing from others.
- Different install method: replacing rotted wood bucks or adjusting openings takes extra labor that not every quote shows.
Before you compare totals, compare scope. Ask each company to quote the same openings, and ask them to show the impact window styles and products they install by name so you know exactly what each price buys.
What Every Impact Window Quote Must List
A complete impact window quote is written, itemized and specific enough that a stranger could tell exactly what will be installed and what is included. If a line below is missing, ask for it in writing before you compare.
| Line item | What the quote should say | Why it matters |
|---|---|---|
| Company details | Legal name, address, phone and Florida contractor license number | Lets you verify the license on MyFloridaLicense.com |
| Each opening | Location (for example “kitchen, rear”), size and window style | Makes quotes comparable and prevents missed openings |
| Product | Manufacturer, product line, frame material and color | “Impact window” alone is not a product |
| Approval number | Miami-Dade NOA or Florida Product Approval number per product | Proves the product is approved for your county |
| Design pressure | DP rating per opening, positive and negative | Must meet what each opening requires |
| Glass | Laminated impact glass, plus any Low-E, tint or insulated glass | Glass type changes protection, heat and noise |
| Permit | Who pulls it, whether fees and engineering are included | Avoids surprise costs and unpermitted work |
| Removal and disposal | Old window removal and debris hauling | Often left out of low quotes |
| Finish work | Stucco patch, exterior paint, interior trim or drywall returns, caulking | The most common source of later “extras” |
| Payment schedule | Deposit amount and what triggers each payment | Protects your money if the job stalls |
| Warranties | Manufacturer warranty and installer workmanship warranty, in writing | Two different promises covering two different problems |
| Timeline | Estimated order, permit and install stages | Lets you plan around hurricane season |
Check the Approval Number and Design Pressure for Each Opening
Every impact window on a quote should carry an approval number and a design pressure rating, and both must fit the opening it is going into. This is the line that matters most for safety, and the one homeowners skip most often.
In Miami-Dade and Broward, which sit in the High-Velocity Hurricane Zone, products need an approval that covers the HVHZ, usually a Miami-Dade Notice of Acceptance (NOA). In Palm Beach County, products are typically approved through Florida Product Approval, listed with an FL number.
Check that the approval is current and that it covers the size of your opening, because an approval only applies up to the sizes it was tested for.
Design pressure (DP) is the wind load a window is rated to resist, written as a positive and negative number in pounds per square foot.
DP is set per opening, based on your home’s location, height and where the window sits on the wall, so two windows on the same house can need different ratings.
Glazing within 30 feet of the ground must pass the large missile test, a 9 lb 2×4 fired at 50 feet per second.
To compare quotes fairly, build a simple worksheet with one row per opening:
| Column | What to write in it | Where to find it |
|---|---|---|
| Opening | Room and wall, for example “primary bedroom, east” | Quote or measurement sheet |
| Size and style | Width x height, single-hung, fixed, slider door | Quote line |
| Product and approval | Product line plus NOA or FL number | Quote line or product sheet |
| DP rating | Rated DP vs required DP for that opening | Quote, approval or permit drawings |
| Glass | Laminated, Low-E, tint, insulated | Quote line |
| Price | Price for that opening, if the company itemizes | Quote line |
If a company cannot fill in the approval and DP columns, that quote is not ready to compare. Our guide on checking whether windows are hurricane rated shows how to look up an approval, and how design pressure and missile tests work explains the ratings in more depth.
Compare the Glass and Frame, Not Just the Brand
Two quotes for the same brand can describe very different windows, so compare the glass and frame line by line. The brand name tells you who made the window; the product line, glass and frame tell you what you are buying.
- Laminated glass: impact windows use laminated glass, two layers bonded to a clear interlayer that holds the glass in the frame when it breaks. The quote should say “laminated” or “impact glass”.
- Tempered is not impact: tempered glass is safety glass that breaks into small pieces. On its own it is not impact-rated, so a quote that lists only “tempered” is not quoting an impact window.
- Glass options: Low-E coatings, tints and insulated laminated glass change heat gain, glare and noise. Make sure every quote uses the same options before comparing prices.
- Frame material and finish: aluminum and vinyl frames differ in look, maintenance and price. Check the frame color and whether it matches across all openings.
- Screens and hardware: confirm screens are included where windows open, and that locks and hardware are the standard ones for that product.
For a fuller product checklist, see what to look for in hurricane impact windows. If two quotes use different manufacturers, our comparison of impact window brands and how they differ can help you weigh them.
Who Pulls the Permit and What Happens at Inspection
Impact window replacement in South Florida needs a building permit, and the quote should say who pulls it and whether the fees are included. The company that pulls the permit should be the licensed contractor named on the quote.
Ask each company these permit questions:
- Is the permit fee included in the price, or billed separately?
- Are engineering or wind load calculations included if the permit office requires them?
- Who records the Notice of Commencement, if one is required for the job?
- Who schedules the inspections, and who attends?
- Will you receive the final inspection result and closed permit for your records?
The closed permit matters after the job. A wind mitigation inspector may ask for it when you apply for insurance credits, and buyers and their inspectors may ask for it when you sell. Our post on upgrades that can lower your insurance rates explains how opening protection is credited.
To see where the permit fits in the full job, read the impact window installation process step by step.
Stucco, Trim, Disposal and Other Work Quotes Leave Out
Finish work is where low quotes most often hide extra costs. Removing an old window from a concrete block wall disturbs the stucco outside and the trim or drywall inside, and someone has to repair both.
Check that each quote covers, or clearly excludes:
- Exterior stucco patch and paint: is paint included, and will it match the wall?
- Interior finish: drywall returns, trim, sills and caulking around each window.
- Bucks: the wood or concrete frame the window anchors to. Ask how rotted bucks are handled and priced if the crew finds them.
- Removal and disposal: old windows, glass and debris hauled away.
- Alarm sensors: who removes and reconnects window sensors if you have a security system.
- Window treatments: who takes down and rehangs blinds, shutters or curtains.
- Cleanup: daily site cleanup and a final clean.
An exclusion is fine as long as it is written down. What causes disputes is a quote that says nothing. How the window is anchored and sealed matters as much as the window itself, which we cover in our guide to anchoring and sealing impact windows.
Payment Terms: Deposits, Progress Payments and Final Payment
A fair impact window quote asks for a deposit, ties later payments to clear milestones, and leaves the final payment until the job passes final inspection. Avoid any quote that asks for full payment upfront.
Florida law sets rules every quote should respect:
- Deposits over 10 percent: under Section 489.126 of the Florida Statutes, a contractor who takes an initial payment of more than 10 percent of the contract price for residential work must apply for the permit within 30 days and start work within 90 days after the permit is issued, unless there is just cause or you agree in writing to a longer period.
- Recovery fund notice: Section 489.1425 requires most residential contracts over $2,500 to include a written notice about the Florida Homeowners’ Construction Recovery Fund. A contract without it is a warning sign.
- Lien protection: under Florida’s construction lien law, suppliers and others who worked on the job and are not paid can file a lien on your home. Before the final payment, ask for the contractor’s final payment affidavit and lien releases from everyone who supplied materials or labor.
A sensible schedule links each payment to something you can see: the contract signed, the permit issued, the windows delivered, the installation finished and the final inspection passed. If you plan to finance, ask for the financing terms in writing alongside the quote.
Our impact window financing options for homeowners explain what qualified buyers can expect from independent third-party providers, if financing is available, including $0 down and 0% interest plans with a soft credit check.
Two Warranties to Get in Writing
The quote should name both warranties and their length in writing: the manufacturer warranty on the product and the installer’s workmanship warranty on the installation. Our guide to choosing a contractor explains what each impact window warranty covers and what to ask about each one.
Red Flags That Should Rule Out a Quote
Some problems are serious enough to rule a quote out, however low the price. Choosing the wrong impact window company usually shows up first as one of these warning signs on paper:
- No license number on the quote, or a license you cannot find on MyFloridaLicense.com.
- No approval number for the products, or a vague promise that they are “hurricane rated”.
- A single lump-sum price with no list of openings, products or included work.
- “Tempered” listed as the impact option, or no mention of laminated glass.
- Full payment or a large cash deposit upfront, with nothing tied to milestones.
- You are asked to pull the permit yourself as an owner-builder for a job the company is doing.
- Pressure to sign today, such as a price that “expires tonight”.
- No written warranty, or only a verbal promise about workmanship.
- No local address, especially crews that arrive door to door after a storm.
Green Flags and Red Flags at a Glance
Use this table as a quick check for each quote. A quote with green flags in every row is ready to compare on price.
| Check | Green flag | Red flag |
|---|---|---|
| License | License number on the quote, active on MyFloridaLicense.com | No number, or the company avoids the question |
| Openings | Every opening listed with size and style | One total price for “the house” |
| Approval | NOA or FL number for each product | “Hurricane rated” with no number |
| Design pressure | DP rating listed per opening | No DP, or one rating for every window |
| Glass | Laminated impact glass named | Only “tempered” or no glass type |
| Permit | Contractor pulls it, fees stated | You pull it, or “no permit needed” |
| Finish work | Stucco, trim and disposal included or excluded in writing | Not mentioned |
| Payment | Deposit plus milestone payments, final after inspection | Full payment upfront |
| Warranty | Manufacturer and workmanship warranties in writing | Verbal promise only |
How to Compare Quotes Side by Side in Six Steps
The fastest way to compare impact window quotes is to turn each one into the same format, then judge them on scope, safety and terms before price.
- Collect written, itemized quotes from each company for the same openings.
- Fill in the per-opening worksheet with product, approval number, DP and glass.
- Mark every missing line and ask each company to answer it in writing.
- Check the license, permit and payment terms against the red flags above.
- Compare both warranties side by side, including length and transfer.
- Compare totals last, once every quote covers the same scope.
Once the quotes match on scope, the price difference that remains is real, and you can weigh it against the company’s track record and how clearly it answered your questions.
Impact Window Quote FAQs
How many impact window quotes should I get?
Get at least three written, itemized quotes, which is what the Florida Attorney General’s consumer advice recommends for home repairs. Three quotes are usually enough to spot a price that is far out of line, a missing line item, or a product that is not approved for your county.
Should I just pick the cheapest impact window quote?
Only if it covers the same scope as the others. A low quote that leaves out the permit, stucco repair, disposal or a few openings often ends up costing more after change orders. Compare scope, approvals and warranties first, then price.
Can I ask one company to match another company’s quote?
You can ask, but make sure the match covers the same products, approvals, DP ratings, glass and finish work. A matched price on a lower-rated product or a smaller scope is not a real match. Share the line items you want matched, not just the total.
Can I cancel an impact window contract after signing?
It depends on how the sale was made. If a salesperson solicited you and you signed away from the company’s place of business, Florida’s home solicitation sale law can give you until midnight of the third business day to cancel in writing. Read the cancellation terms in the contract before you sign.
Is a verbal quote or a text message price enough?
No. A verbal or texted price cannot be checked against approvals, permit terms or warranties, and it is hard to enforce if the scope changes. Ask for a written, itemized quote with the company’s license number before you compare or sign anything.
Ready to Compare Your Quotes?
When you have your quotes, run each one through the table above and ask every company to fill the gaps in writing. The right quote is the one that lists every opening, every approval and every cost, with payment and warranty terms you can live with.
We are happy to be one of the quotes you compare. Our free estimate lists every opening, and you can ask us for the approval and design pressure of each one. Our Florida contractor license is CGC1526707, so you can check it on DBPR before you compare.
You can also meet the USA Home Improvement team that serves Miami-Dade, Broward and Palm Beach. Call (877) 554-6373 or request a free estimate.
USA Home Improvement is licensed (CGC1526707) and insured and has served Florida homeowners for more than 15 years.