Windows · Seattle, WA
How much does wood and fiberglass window replacement cost in Seattle, WA? (2026)
In Seattle, wood and fiberglass window replacement runs $11,900–$29,500, with most paying around $20,700 — 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 $20,700
- Typical cost
- $20,700
- Labor vs US
- +14%
- Climate
- Mixed
- Local permit
- $125
Refine your estimate
Tune it to your home to narrow the wood and fiberglass window replacement range.
Key takeaways for Seattle
- $11,900 on the low end, $29,500 on the high — wood and fiberglass window replacement in Seattle averages $20,700, about 18% above the national average.
- Running +14% against the US average, Seattle labor is what moves this price off the national figure.
- 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.
- Roughly 5–15% comes off when you book in Late fall and winter instead of peak season.
- What you actually pay may drop below this range once 25C/25D credits and local utility rebates apply — details are in the rebates section.
What goes into the price in Seattle
A typical Seattle wood and fiberglass window replacement of $20,700 breaks down roughly like this — materials priced near the national level, labor set by local rates.
| Line item | Seattle 2026 range |
|---|---|
| Materials & equipmentEquipment and supplies, which price out close to the national baseline. | $5,300 – $13,200 |
| Labor & installationCrew time for removal, installation and startup; local labor rates drive most of the swing here. | $6,475 – $16,175 |
| Permit & feesThe Windows permit fee for this metro, based on local rates. | $125 |
| Total installed cost | $11,900 – $29,500 |
Split from the Seattle estimate using a 55% local-labor share; line items sum to the total.
Why wood and fiberglass window replacement costs what it does in Seattle
- Expect labor here to run 14% above the national norm (based on price levels for the Seattle-Tacoma-Bellevue metro area) — that's what raises the total.
- Seattle's Windows permit runs roughly $125, which is already part of the number above.
Wood & Fiberglass Window Replacement cost by number of windows in Seattle
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 | Seattle 2026 range |
|---|---|
| 5 windows | $5,400 – $13,050 |
| 10 windows | $10,700 – $23,650 |
| 15 windows | $16,000 – $33,050 |
| 20 windows | $21,300 – $42,450 |
| 25+ windows (whole home) | $26,000 – $53,000 |
National size ranges localized to Seattle labor and climate.
Wood & Fiberglass Window Replacement cost by type in Seattle
| Fiberglass | $11,950 – $26,100 |
| Composite | $13,100 – $27,250 |
| Aluminum-clad wood | $15,450 – $32,000 |
| Solid wood | $16,650 – $35,550 |
Adjusted to Seattle from national type-level ranges.
Wood & Fiberglass Window Replacement cost by efficiency in Seattle
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 Seattle
Install crew, removal, permit & startup — the part Seattle rates move most.
Equipment & materials — priced closer to the national level.
Split based on a typical $20,700 Seattle project; your mix varies with scope.
Skilled installers in the Seattle-Tacoma-Bellevue area earn about $41.1/hr (32% 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 |
| Seattle labor adjustment | ×1.18 |
| mixed climate factor | ×1 |
| Local permit | +$125 |
| Seattle estimate | $11,900 – $29,500 |
Promo prices vs. the real cost
Window ads lead with a per-window teaser — it rarely covers the full installed job:
- Financing offers$0 down · 0% APR, 12–60 mo
- 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
Additional wood and fiberglass window replacement costs to budget for
Only a handful of these will touch your total. Which ones depend on what's already in place and how the crew has to reach it.
| 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
- Old window removal
- Interior and exterior trim
- 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 Seattle
- Check efficiency rebates
- Use premium only where visible, vinyl elsewhere
- Fiberglass costs less than wood with similar looks
- Bundle the whole house in one job
How long does wood and fiberglass window replacement last in Seattle?
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 Seattle
- 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 Seattle?
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 Seattle, WA
Seattle, WA sits in a mixed climate — the North-Central / South-Central ENERGY STAR window zone. To qualify for ENERGY STAR (v7.0), replacement windows here should meet:
Mixed climates need balance: a low U-factor for winter plus a controlled SHGC so summer sun doesn't overheat the home. Requirements tighten as you move south.
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 Seattle
Two things line up in fall and winter: installers have open calendars and need the work, and manufacturers run their best promotions of the year. Buy then and you get both breaks at once.
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)
- Glass package (double vs. triple pane, low-E, gas fill) swings the price.
- Full-frame replacement costs more than an insert (pocket) install — make sure bids match.
- Trim, disposal and exterior flashing/caulking may be excluded.
Get an apples-to-apples bid
- Compare frame material on equal terms.
- Match the glass package and ENERGY STAR rating across quotes.
- Confirm disposal, trim and flashing are included.
- Check warranties on frame, glass seal and labor separately.
Questions to ask Seattle Windows pros
You can't judge bids side by side unless they cover the same ground; run through these with every pro on your list.
- 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 Seattle
How much does wood and fiberglass window replacement cost in Seattle, WA?
Expect to pay $11,900 to $29,500 for wood and fiberglass window replacement in Seattle in 2026 — most quotes cluster around $20,700. That range already accounts for Seattle's labor rates, its mixed climate and local permit costs.
Is wood and fiberglass window replacement more expensive in Seattle than average?
Yes — Seattle is about 18% higher than the national average, largely a function of local labor pricing at 1.18× the US average.; add in a Windows permit at roughly $125.
Do I need a permit for wood and fiberglass window replacement in Seattle?
A Windows permit is standard in Seattle for this kind of work, at roughly $125. You won't need to add it on top of the estimate above — it's already there.
What affects wood and fiberglass window replacement cost the most?
Worth knowing first: whole-home window replacement with premium wood or fiberglass windows — higher cost, better looks and longevity. Your mixed climate zone plays a part, but equipment/material grade, the size and complexity of the home, and local labor rates weigh in just as heavily.
How much should new windows really cost you?
Not every dollar in a window quote buys the same thing. Our editors break down frame, glass and install method to show where the value actually is.
The value case
Double-pane, low-E vinyl is the workhorse spec for a reason: it handles the vast majority of drafts and heat loss without the price jump of premium materials. When you're replacing every window at once and watching the total, it's the default that leaves the least on the table.
The efficiency case
Where winters bite or summers punish, upgrading the glazing — triple-pane or a gas-filled low-E package — returns real money on heating and cooling bills, and ENERGY STAR-rated units can open the door to rebates. Put that upgrade money into the glass before you spend it on a fancier frame.
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.
Vinyl frames are the sensible default unless your situation says otherwise; the glass package is where climate-specific spending pays off. Install quality is the one place a discount always costs more later.
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 Seattle using the BLS metro wage data labor index (×1.18 here), the IECC mixed-climate factor (×1) 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 Seattle 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 Seattle
Homeowners in Seattle 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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