Basic
$0.97 – $4.38 per sq ft
R-30 fiberglass batts between floor joists pressed against the subfloor, wire supports at regular spacing
How Much Does Floor Insulation Cost in Seattle, Washington?
Insulate the underside of a floor over a crawl space or unheated area with batts, rigid board or spray foam between joists, supported in place.
Floor Insulation in Seattle, Washington typically costs $1.15 to $5.15 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Floor Insulation in Seattle, Washington
$1.15 – $5.15
per sq ftPrices in Seattle are 19.0% higher than the national average for floor insulation.
National average: $1 – $4.50 per sq ft
What you get at each price level
Standard
$1.15 – $5.15 per sq ft
R-30 fiberglass batts pressed against the subfloor, held with wire supports, gaps at rim joists stuffed with insulation
Premium
$1.43 – $6.44 per sq ft
R-30 fiberglass batts pressed to the subfloor, wire supports at close spacing, rim joists insulated, batts cut tight around pipes and wiring
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.47 – $2.10 | sq ft |
| Labor | labor | $0.47 – $2.12 | sq ft |
| Supplies & Other | supplies | $0.12 – $0.56 | sq ft |
| Equipment & Disposal | equipment | $0.08 – $0.37 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($0.45-$2.02 per square foot)
- Labor ($0.35-$1.58 per square foot)
- Supplies & Other ($1.00-$4.50 per square foot)
- Equipment & Disposal ($1.00-$4.50 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
- InsulationCalcs: Floor & Crawlspace Insulation Cost, insulationcalcs.com, retrieved Nov 2026
- PICKHVAC: Insulation for Crawl Space, pickhvac.com, 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 floor insulation contractors in Seattle for personalized quotes based on your specific project.