Windows · Mount Prospect, IL
How much does wood and fiberglass window replacement cost in Mount Prospect, IL? (2026)
In Mount Prospect, wood and fiberglass window replacement runs $11,800–$29,350, with most paying around $20,600 — about 18% above the national average. Whole-home window replacement with premium wood or fiberglass windows — higher cost, better looks and longevity.
Updated June 2026 · Localized estimate, not a quote
Most homeowners pay around $20,600
- Typical cost
- $20,600
- Labor vs US
- +6%
- Climate
- Cold
- Local permit
- $125
Refine your estimate
Tune it to your home to narrow the wood and fiberglass window replacement range.
Key takeaways for Mount Prospect
- Mount Prospect homeowners typically pay $11,800–$29,350 for wood and fiberglass window replacement, with $20,600 the usual landing spot — about 18% above the national average.
- Local labor in Mount Prospect is +6% relative to the national average, which is what pushes this estimate away from the countrywide number.
- Set aside roughly $125 for the permit; that's already part of the range above, not an add-on.
- 30 to 50 years is the usual service life, so budget for the next one before it fails.
- Time it right and you can save 5–15%: the best window to book is Late fall and winter.
- Don't price this without checking the rebates section below — federal 25C/25D credits and local utility incentives can bring the net cost down.
What goes into the price in Mount Prospect
A typical Mount Prospect wood and fiberglass window replacement of $20,600 breaks down roughly like this — materials priced near the national level, labor set by local rates.
| Line item | Mount Prospect 2026 range |
|---|---|
| Materials & equipmentUnit, materials and supplies — priced close to the national level. | $5,250 – $13,150 |
| Labor & installationCrew time for removal, installation and startup; local labor rates drive most of the swing here. | $6,425 – $16,075 |
| Permit & feesThe Windows permit fee for this metro, based on local rates. | $125 |
| Total installed cost | $11,800 – $29,350 |
Split from the Mount Prospect estimate using a 55% local-labor share; line items sum to the total.
Why wood and fiberglass window replacement costs what it does in Mount Prospect
- Mount Prospect's labor rates sit about 6% higher than the national average (based on price levels for the Chicago-Naperville-Elgin metro area), pushing the price up.
- Mount Prospect's cold climate increases typical wood and fiberglass window replacement cost by about 4% versus a neutral climate.
- Budget about $125 for the local Windows permit in Mount Prospect — already folded into the estimate above.
Wood & Fiberglass Window Replacement cost by number of windows in Mount Prospect
Wood and fiberglass windows are a premium upgrade — figure roughly $800–$2,500 per window installed depending on material, size, and finish. Cost scales with the number of openings, and wood typically runs higher than fiberglass.
| number of windows | Mount Prospect 2026 range |
|---|---|
| 5 windows | $5,400 – $13,000 |
| 10 windows | $10,650 – $23,500 |
| 15 windows | $15,900 – $32,850 |
| 20 windows | $21,150 – $42,200 |
| 25+ windows (whole home) | $25,850 – $52,700 |
National size ranges localized to Mount Prospect labor and climate.
Wood & Fiberglass Window Replacement cost by type in Mount Prospect
| Fiberglass | $11,750 – $25,750 |
| Composite | $12,950 – $26,900 |
| Aluminum-clad wood | $15,250 – $31,550 |
| Solid wood | $16,450 – $35,050 |
Adjusted to Mount Prospect from national type-level ranges.
Wood & Fiberglass Window Replacement cost by efficiency in Mount Prospect
Frame material sets the price and the look. Fiberglass is durable and low-maintenance; wood (often clad in aluminum outside) offers the richest appearance but costs more. The glass package adds on top. Prices are per window installed.
| Fiberglass frame (double-pane low-E)Strong, stable, very low maintenance | $850 – $1,750 |
| Wood frame / aluminum-clad woodPremium look; needs periodic finishing | $1,300 – $2,700 |
| Triple-pane premium (wood or fiberglass)Top efficiency and sound control | $1,750 – $3,400 |
Labor vs. materials in Mount Prospect
Install crew, removal, permit & startup — the part Mount Prospect rates move most.
Equipment & materials — priced closer to the national level.
Split based on a typical $20,600 Mount Prospect project; your mix varies with scope.
Skilled installers in the Chicago-Naperville-Elgin area earn about $38.1/hr (23% above the US average, per BLS metro wage data) — the local wage is what moves the labor half of your wood and fiberglass window replacement cost.
How we estimate it
| National range | $10,000 – $25,000 |
| Mount Prospect labor adjustment | ×1.12 |
| cold climate factor | ×1.04 |
| Local permit | +$125 |
| Mount Prospect estimate | $11,800 – $29,350 |
Promo prices vs. the real cost
Window ads lead with a per-window teaser — it rarely covers the full installed job:
- Free in-home estimate$0 — it's a sales visit
- "Buy 2, get 2" / BOGO dealsdiscount is off an inflated list price
- "From $189/window" teaserinstall, trim & disposal usually extra
- Financing offers$0 down · 0% APR, 12–60 mo
Additional wood and fiberglass window replacement costs to budget for
Treat them as possibilities, not certainties — the ones that reach your quote follow your property's age and setup.
| Old window removal & disposalPer window; usually bundled into the quote | $30 – $75 |
| Full-frame (vs. insert/pocket) replacementPer window; standard for wood to flash properly | $150 – $450 |
| Rotted sill / frame repairPer opening, found after removal | $200 – $800 |
| Custom or non-standard size / shapeBay, bow, arched, or oversized units cost more | $200 – $1,000 |
| Interior/exterior trim, casing & stainingPer window; wood often gets a stained finish | $100 – $400 |
Typical national add-on ranges; confirm locally during your quote.
What's included
- Interior and exterior trim
- Old window removal
- Installation, flashing and sealing
- Premium wood or fiberglass windows
What affects the cost
- Material (fiberglass vs solid wood vs clad)
- Historic or architectural matching
- Custom sizing and shapes
- Number of windows
Ways to save on wood and fiberglass window replacement in Mount Prospect
- Fiberglass costs less than wood with similar looks
- Bundle the whole house in one job
- Check efficiency rebates
- Use premium only where visible, vinyl elsewhere
How long does wood and fiberglass window replacement last in Mount Prospect?
Fiberglass lasts 30–50+ years; well-maintained wood can match it, but neglected wood rots far sooner.
Fiberglass is nearly maintenance-free. Wood (and the exterior of clad units) needs periodic repainting or re-staining and seal checks.
Signs you need wood and fiberglass window replacement in Mount Prospect
- Windows stick, swell, or are hard to open and close
- Fog or condensation appears between the panes (the seal has failed)
- Wood frames show rot, soft spots, peeling paint, or water staining
- You feel drafts near the window when it's shut
- They're single-pane originals and energy bills are high
- Visible warping, cracking, or daylight around the sash
- Outside noise comes through easily
Repair or replace in Mount Prospect?
Repair if…
- The wood frame is structurally sound and just needs refinishing or minor rot repair
- Only the seal, weatherstripping, or hardware has failed
- It's a historic or character window worth restoring
- The unit is under warranty
Replace if…
- Condensation is sealed between the panes (the IGU seal is gone)
- Rot has spread into the structural frame or sill
- They're single-pane and you want major energy savings
- Several windows are failing — bulk replacement lowers per-window cost
Climate-zone spec
What window rating you need in Mount Prospect, IL
Mount Prospect, IL sits in a cold climate — the Northern ENERGY STAR window zone. To qualify for ENERGY STAR (v7.0), replacement windows here should meet:
In cold climates, a low U-factor (insulating value) matters most — it cuts heat loss and heating bills. A modest solar heat gain (SHGC) is even helpful for passive winter warmth.
Thresholds from ENERGY STAR Residential Windows v7.0. Costadia groups cities into cold / mixed / hot bands — for your exact county's zone, use the ENERGY STAR Climate Zone Finder. Source.
Rebates & incentives
The federal window tax credit is gone for 2026, but ENERGY STAR windows can still earn utility rebates in some areas — and the real long-run savings come from lower heating and cooling bills.
- The federal 25C tax credit (up to $600/yr for ENERGY STAR Most Efficient windows) ended December 31, 2025 under the One Big Beautiful Bill Act — not available for 2026.
- Some utilities still rebate high-efficiency windows — real examples include Mass Save (~$75/window on single-pane replacements) and Puget Sound Energy (up to $100/window, more for income-qualified, through 2026).
- There is no federal HEAR rebate for windows (that program targets electrification equipment like heat pumps), so utility and state programs are the path — check the DSIRE database.
- The durable savings are on your energy bills: right-rated windows for your climate zone cut heating/cooling costs every year (see the climate-zone spec above).
Verified July 2026. Program budgets and windows change fast — confirm current amounts and eligibility with your utility and the DSIRE database. Costadia does not administer these programs.
Rebates & tax credits
The federal 25C window tax credit (30%, up to $600) ended December 31, 2025 and no longer applies to 2026 installs. ENERGY STAR Most Efficient wood or fiberglass windows still pay back through lower energy bills, and many utilities and states offer their own rebates — check the DSIRE database.
Cheapest time for wood and fiberglass window replacement in Mount Prospect
Installers discount labor in the slow winter months, and manufacturers layer rebates on top during the same stretch — buying off-season means catching both at once instead of neither.
Why wood and fiberglass window replacement quotes vary — and how to compare them fairly
When two quotes for one project diverge by thousands, the cause is usually what each one includes, not markup — here's how to read the difference.
Why a quote looks high (or low)
- Full-frame replacement costs more than an insert (pocket) install — make sure bids match.
- Trim, disposal and exterior flashing/caulking may be excluded.
- Frame material — vinyl, wood, fiberglass — is a big driver.
Get an apples-to-apples bid
- Compare frame material on equal terms.
- Match the glass package and ENERGY STAR rating across quotes.
- Specify full-frame vs. insert for every bid.
- Check warranties on frame, glass seal and labor separately.
Questions to ask Mount Prospect Windows pros
Quotes only compare cleanly when every bidder is pricing the same work — put these to each of them before you commit.
- 1Is this a full-frame replacement or an insert (pocket) install?
- 2What's the glass package — double vs. triple pane, low-E coating, gas fill?
- 3Are disposal, trim, and exterior caulking/flashing included?
- 4Are the windows ENERGY STAR rated for my climate zone?
- 5What's the warranty on the frame, glass seal, and the installation labor?
Wood & Fiberglass Window Replacement in Mount Prospect
How much does wood and fiberglass window replacement cost in Mount Prospect, IL?
Mount Prospect's going rate for wood and fiberglass window replacement is $11,800–$29,350 in 2026, with $20,600 the number most homeowners end up paying. That range already accounts for Mount Prospect's labor rates, its cold climate and local permit costs.
Is wood and fiberglass window replacement more expensive in Mount Prospect than average?
Why the gap? Mount Prospect prices about 18% higher than the national average, and local labor — indexed at 1.12 against the US average — does most of the work. and the local Windows permit costs about $125.
Do I need a permit for wood and fiberglass window replacement in Mount Prospect?
Most Mount Prospect jurisdictions require a Windows permit for this work. Budget roughly $125 for the permit; it is already included in the estimate above.
What affects wood and fiberglass window replacement cost the most?
Whole-home window replacement with premium wood or fiberglass windows — higher cost, better looks and longevity. What moves the price most: equipment or material grade, your home's size and complexity, local labor rates, and the cold climate zone.
How much should new windows really cost you?
Windows are priced by frame, glass and install method — and homeowners often spend on the wrong one. Our editors on what's worth paying for.
The install case
A perfect window installed badly leaks and fails. Full-frame replacement with proper flashing beats a cheap pocket insert in a rotted opening — match the install method to your home's condition, not just the price.
The value case
Vinyl, double-pane, low-E windows deliver most of the comfort and efficiency for the lowest price. For whole-home replacements on a budget, they're the sensible default.
The efficiency case
Extreme climates are the one setting where premium glazing pays for itself over the years: triple-pane and gas-fill packages hold indoor temperatures steadier and trim the utility bill, with rebate eligibility a possible bonus on ENERGY STAR models. Between a better frame and better glass, the glass is where the payback lives.
Windows reward homeowners who spend deliberately: glass tuned to the climate, a vinyl frame by default, and an installer who won't skip flashing. Trim the frame line before you touch either of the other two.
Editorial analysis by Serhat Özçelik, reviewed by Costadia Editorial. These are our own cost perspectives, not third-party endorsements.
How we calculated this estimate
We start with 2026 national wood and fiberglass window replacement ranges compiled from contractor-pricing sources (Angi, HomeGuide, Fixr and EnergySage averages), then localize them to Mount Prospect using the BLS metro wage data labor index (×1.12 here), the IECC cold-climate factor (×1.04) and a typical local permit fee (≈$125). Federal incentive details reference the IRS Inflation Reduction Act (25C/25D) and DSIRE.
This is a planning estimate, not a quote.Actual prices vary with your home's condition, equipment grade and contractor — always confirm with licensed local pros before budgeting.
References & data sources
Our Mount Prospect wood and fiberglass window replacement estimate is built from these primary, mostly government sources — not a single aggregator.
- Occupational Employment & Wage Statistics (metro wages) — U.S. Bureau of Labor Statistics.Metro-level trade wages behind each city's labor index.
- Regional Price Parities (state & metro) — U.S. Bureau of Economic Analysis.Regional price levels used where metro wage data is unavailable.
- IECC Climate Zones — U.S. DOE — Building Energy Codes Program.Climate-zone factors applied to weather-sensitive projects.
- Home Energy Tax Credits (25C / 25D) — Internal Revenue Service.Federal rebate and tax-credit figures for eligible upgrades.
- Database of State Incentives for Renewables & Efficiency — DSIRE — NC State University.State and utility incentive programs by ZIP code.
Wood and fiberglass window replacement alternatives in Mount Prospect
Homeowners in Mount Prospect often pair this with
A wood and fiberglass window replacement rarely happens in isolation — these projects commonly come up alongside it.
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