Basic
$2.43 – $5.35 per sq ft
Closed-cell spray foam about 2 in. thick (around R-13), sprayed in one pass to an even layer across the surface
How Much Does Closed Cell Spray Insulation Cost in Seattle, Washington?
Closed-cell spray foam applied 2-3 inches thick in walls, rim joists, crawl spaces or roof deck, per sq ft of surface treated.
Closed Cell Spray Insulation in Seattle, Washington typically costs $2.86 to $6.30 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Closed Cell Spray Insulation in Seattle, Washington
$2.86 – $6.30
per sq ftPrices in Seattle are 19.0% higher than the national average for closed cell spray insulation.
National average: $2.50 – $5.50 per sq ft
What you get at each price level
Standard
$2.86 – $6.30 per sq ft
Closed-cell spray foam about 2.5 in. thick (around R-16), even coverage, rim joist and edge gaps sealed
Premium
$3.58 – $7.87 per sq ft
Closed-cell spray foam about 3 in. thick (around R-20) in two passes, seams and penetrations sealed, overspray trimmed in stud bays
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $1.16 – $2.58 | sq ft |
| Labor | labor | $1.18 – $2.57 | sq ft |
| Supplies & Other | supplies | $0.31 – $0.69 | sq ft |
| Equipment & Disposal | equipment | $0.21 – $0.46 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($1.12-$2.48 per square foot)
- Labor ($0.88-$1.92 per square foot)
- Supplies & Other ($0.30-$0.66 per square foot)
- Equipment & Disposal ($0.20-$0.44 per square foot)
Local Price Adjustments
Material costs4.0% above avg
Labor costs34.0% above avg
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
References
- Spray Foam Insulation Costs - Forbes Home, Forbes Home, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Seattle
Connect with local closed cell spray insulation contractors in Seattle for personalized quotes based on your specific project.