Window Replacement · Seattle, WA

Window Replacement in Seattle, WA: 2026 Costs & Local FAQs

Updated 2026-10-18 · Reviewed by the HomeServiceBud Editorial Team

Quick answer

Window replacement in Seattle typically costs about $300–$2,100 per window nationally, with an average around $850. Adjusted for Washington prices, plan on roughly $320–$2,300. In Seattle, the biggest local factors are high humidity.

Key takeaways

  • Typical cost in Seattle: $320–$2,300 (per window installed); national range $300–$2,100.
  • Biggest local factors: high humidity.
  • How long it takes: Installers typically need about 2 hours per standard window; hard upper-floor units can take 6+ hours.
  • Permits: Permits ($50–$300) are usually needed only when the opening size or structure changes.
  • Best timing: Any season works; spring and fall are popular.
  • Before you hire: get at least three written, itemized quotes from licensed, insured Washington contractors.

What Seattle homeowners should know

Seattle's mild, wet marine climate means long rainy seasons rather than extreme heat or cold. Moss, rot and mold are the region's signature home problems, so roofs, gutters and crawl spaces need regular attention.

The area faces earthquake risk from the Cascadia subduction zone and local faults, and hillside homes can have drainage and landslide problems in wet winters. Air conditioning was once rare, but the record June 2021 heat dome made heat pumps a popular upgrade.

How much does window replacement cost in Seattle, WA?

Window replacement typically costs $300–$2,100 per window, with an average around $850. Frame material, window style and installation method drive the price. Washington prices run 8% above the U.S. average, so a typical Seattle job lands around $320–$2,300. Local labor rates, permit fees and your home's specifics move the final number.

ItemTypical costNotes
Vinyl frame$100–$900Per unit
Wood frame$150–$1,300Per unit
Fiberglass frame$500–$1,500Per unit
Aluminum frame$75–$400Per unit
Double-hung window$150–$650Materials only
Casement window$150–$1,000Materials only
Bay window$910–$7,100Materials only

As a large city, Seattle has plenty of contractors competing for work, which helps on price, but busy seasons can mean longer waits. Book early after major storms.

How we calculate costs

National ranges come from published cost surveys (cited below). Local estimates apply an approximate state cost index. Read our methodology.

Window Replacement cost questions for Seattle, WA

  • What is the cost of vinyl frame in Seattle, WA? The typical cost of vinyl frame in Seattle, WA is $110–$970, adjusted for Washington prices (national $100–$900). Per unit.
  • What is the cost of wood frame in Seattle, WA? The typical cost of wood frame in Seattle, WA is $160–$1,400, adjusted for Washington prices (national $150–$1,300). Per unit.
  • What is the cost of fiberglass frame in Seattle, WA? The typical cost of fiberglass frame in Seattle, WA is $540–$1,600, adjusted for Washington prices (national $500–$1,500). Per unit.
  • What is the cost of aluminum frame in Seattle, WA? The typical cost of aluminum frame in Seattle, WA is $80–$430, adjusted for Washington prices (national $75–$400). Per unit.
  • What is the cost of double-hung window in Seattle, WA? The typical cost of double-hung window in Seattle, WA is $160–$700, adjusted for Washington prices (national $150–$650). Materials only.
  • What is the cost of casement window in Seattle, WA? The typical cost of casement window in Seattle, WA is $160–$1,100, adjusted for Washington prices (national $150–$1,000). Materials only.
  • What is the cost of bay window in Seattle, WA? The typical cost of bay window in Seattle, WA is $980–$7,700, adjusted for Washington prices (national $910–$7,100). Materials only.
  • What is the cost of retrofit (insert) labor in Seattle, WA? The typical cost of retrofit (insert) labor in Seattle, WA is $110–$320, adjusted for Washington prices (national $100–$300). Needs a sound existing frame.
  • What is the cost of full-frame labor in Seattle, WA? The typical cost of full-frame labor in Seattle, WA is $160–$860, adjusted for Washington prices (national $150–$800). Allows repair of hidden damage.
  • What is the cost of triple-pane window in Seattle, WA? The typical cost of triple-pane window in Seattle, WA is $320–$2,900, adjusted for Washington prices (national $300–$2,700). Installed; double-pane $280–$1,500.

What affects window replacement in Seattle

High humidityHumidity around Seattle speeds rot in wood frames; vinyl and fiberglass resist moisture better.

Seattle has a mild, wet marine climate. Any season works; spring and fall are popular.

Signs you need new windows

  • Drafts or rising energy bills
  • Condensation between the panes (a failed seal)
  • Windows that are hard to open, close or lock
  • Rot, sagging or warped frames
  • Leaks or mold around the frame
  • Single-pane glass or noticeable outside noise

Common questions about window replacement in Seattle

How much does window replacement cost in Seattle, WA?

Most windows cost about $320–$2,300 each installed in Seattle, WA, with an average around $850 nationally.

How much does it cost to replace 10 windows?

Replacing 10–15 windows typically costs about $4,000–$10,500 all-in nationally.

Are triple-pane windows worth it?

Mainly in cold climates. Triple-pane costs $300–$2,700 installed versus $280–$1,500 for double-pane.

Vinyl or fiberglass windows?

Vinyl costs less ($100–$900 per unit) and lasts 20–40 years; fiberglass costs $500–$1,500 and can last 30–50+ years.

Timeline, permits and DIY in Seattle

How long it takes

Installers typically need about 2 hours per standard window; hard upper-floor units can take 6+ hours.

Permits

Permits ($50–$300) are usually needed only when the opening size or structure changes. Check with the Seattle building department for local rules.

DIY or hire a pro?

Hire a pro: heavy units and upper floors are risky, and poor installs can void warranties.

Questions to ask Seattle contractors

Ask every bidder the same questions so you can compare quotes apples to apples.

  • Is this an insert or full-frame installation?
  • What glass package and coatings are included?
  • Who handles trim, caulking and disposal of old windows?
  • What do the manufacturer and labor warranties cover?

Maintenance that prevents costly repairs

  • Clean weep holes and tracks yearly
  • Recaulk exterior gaps as needed
  • Check seals for fogging between panes

How to hire for window replacement in Seattle

  1. Get at least three itemized quotes listing frame, glass and install method.
  2. Ask whether the quote is insert or full-frame installation.
  3. Confirm the manufacturer and installer warranties.
  4. Check whether a permit is needed for your project.

Window Replacement in Seattle: FAQs

How much does window replacement cost in Seattle, WA?

Nationally, most windows cost $300–$2,100 each installed, about $850 on average. Local labor and permit rules affect the final price.

What windows are best for Seattle's climate?

In hot climates, low-E double-pane glass helps; in cold climates, triple-pane and fiberglass frames perform well.

Do I need a permit to replace windows in Seattle?

Usually only if you change the opening size or structure. Confirm with the Seattle building department.

How much does window replacement cost in Seattle compared to the national average?

With Washington's regional cost index of 1.08, expect roughly $320–$2,300 in Seattle, versus $300–$2,100 nationally.

How long does window replacement take in Seattle?

Installers typically need about 2 hours per standard window; hard upper-floor units can take 6+ hours. Permit and inspection scheduling in Seattle can add a few days.

Do I need a permit for window replacement in Seattle?

Permits ($50–$300) are usually needed only when the opening size or structure changes. Confirm with the Seattle or county building department.

Which Seattle ZIP codes does this guide cover?

This guide applies to Seattle ZIP codes 98101, 98102, 98103, 98104, 98105, 98106, 98107, 98108, 98109, 98111, 98112, 98113, 98114, 98115, 98116, 98117, 98118, 98119, 98121, 98122, 98124, 98125, 98126, 98127, 98129 and more, plus the surrounding area.

Window Replacement near Seattle

Bellevue, WA
6 mi away · pop. 139,820Kirkland, WA
8 mi away · pop. 87,281Medina, WA
5 mi away · pop. 3,226Clyde Hill, WA
6 mi away · pop. 3,230Mercer Island, WA
6 mi away · pop. 25,042Yarrow Point, WA
6 mi away · pop. 1,081White Center, WA
6 mi away · pop. 13,495Newport, WA
7 mi away · pop. 2,218Boulevard Park, WA
8 mi away · pop. 5,287

Other home services in Seattle

HVACAC, furnace and heat pump repair, replacement and costs$7,600–$13,000RoofingRoof replacement, leak repair, hail damage and insurance$7,200–$27,000Kitchen RemodelingKitchen remodel costs, timelines, permits and ROI$10,800–$75,600Bathroom RemodelingBathroom remodel costs, timelines, showers and ROI$7,100–$19,400Water Damage RestorationLeaks, floods, burst pipes, drying and insurance$1,400–$5,800Fire Damage RestorationFire, smoke and soot cleanup, odor removal and insurance$3,100–$41,400Mold RemediationMold removal, testing, costs and insurance$1,600–$5,400Garage Door RepairSprings, cables, openers, off-track doors and costs$90–$730Foundation RepairCracks, settling, piers, slab repair and costs$2,400–$8,500Water Heater ReplacementTank, tankless and heat pump water heater costs, permits and haul-away$950–$2,000Sewer Line Repair & ReplacementSewer line repair, dig replacement and trenchless pipe bursting or lining costs$1,500–$5,700Slab Leak RepairFinding and fixing leaks under a concrete slab: detection, reroute and lining$680–$4,800Electrical Panel Upgrade100 to 200 amp upgrades, panel replacement, meter and subpanel costs$1,400–$3,200Siding ReplacementSiding costs per square foot by material, plus removal, labor and permits$9,200–$21,600Gutter InstallationGutter costs per linear foot by material, plus downspouts, guards and removal$670–$1,800Attic InsulationAttic insulation costs by type, recommended R-values and when to add more$1,800–$2,700

Sources: HomeAdvisor — Window replacement cost · Bob Vila — Window replacement cost · This Old House — How long do windows last. Ranges are rounded estimates; see our editorial policy.

Local risk factors reflect general Washington climate patterns; check FEMA's National Risk Index for county-level ratings. Local estimates apply an approximate regional cost index to national ranges.