Window Replacement Cost in Seattle (2026)
Average cost in Seattle
US$5,735 — US$23,555
US$750 — US$2,500 per sq ft
Cost Breakdown
ItemizedWindow units, frames, and glass packages
60%
Installation, removal, and site prep
30%
Seattle SDCI building permits and plan reviews
6%
Sealants, insulation, and interior trim
4%
Sales Tax at 6.5%
📋What's Included
ScopeTypically Includes
- Standard vinyl double-hung windows
- Removal of old windows
- Installation & insulation
- Interior trim
- Cleanup
Typically Excludes
- Custom or specialty shapes
- Triple-pane or premium glass
- Exterior trim or cladding
- Structural modifications
- Bay or bow windows
Based on replacing 10 standard-size windows with vinyl double-hung.
🧮Estimate Your Cost
InteractiveEstimated Cost
US$4,640 — US$6,960
Based on 8 sources and market data for Seattle. Actual costs may vary depending on specific project requirements.
🏢Top Window Replace Contractors in Seattle
Verified providersEinar Johanson Window & Door
922 N 128th St, Seattle, WA 98133, USA
279 reviews
Lake Washington Windows and Doors
4500 9th Ave NE Suite 300, Seattle, WA 98105, USA
264 reviews
Emerald City Energy Windows & Doors
3225 S 116th St # 117, Tukwila, WA 98168, USA
307 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
In Seattle, a permit is typically not required for 'like-for-like' replacements in existing openings. However, if you are changing the window size, style, or creating new openings, a building permit is required, costing approximately $924 for an $8,000 project valuation in 2026.
According to 2026 market data, vinyl window replacements in Seattle offer an average ROI of 81.6%, while wood windows return approximately 69.8%. For a $15,000 project, homeowners can expect to recoup between $10,470 and $12,240 in home value.
Seattle homeowners report average energy savings of $25 to $100 per month after upgrading to double-pane or triple-pane Low-E glass windows, which are specifically designed to handle the region's moisture and temperature swings.
Vinyl and fiberglass are the most recommended materials for Seattle due to their high moisture resistance. Vinyl is the most cost-effective, averaging $900–$3,500 per unit, while fiberglass offers superior longevity in damp conditions at $2,000–$6,000 per unit.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: today. Updates run weekly. All costs in USD.