Basic
$14 – $25 per sq ft
2x10 joists at 16 in. on center on hangers with 3/4 in. tongue-and-groove OSB subfloor, glued and nailed
Photo: National Institute of Standards and Technology · Public domain · Source
How Much Does Frame Subfloor Cost in Seattle, Washington?
Frame Subfloor: national installed price range, materials and labor breakdown, and local pricing by ZIP code.
Frame Subfloor in Seattle, Washington typically costs $17 to $29 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Frame Subfloor in Seattle, Washington
$17 – $29
per sq ftPrices in Seattle are 19.0% higher than the national average for frame subfloor.
National average: $15 – $26 per sq ft
What you get at each price level
Standard
$17 – $29 per sq ft
Engineered I-joists at 16 in. on center with rim board and blocking, 3/4 in. T&G OSB subfloor glued and screwed
Premium
$21 – $37 per sq ft
Deeper engineered I-joists at 16 in. for a stiffer floor, rim and blocking, 3/4 in. T&G plywood subfloor glued and screwed
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $6.88 – $12 | sq ft |
| Labor | labor | $6.90 – $12 | sq ft |
| Supplies & Other | supplies | $1.83 – $3.19 | sq ft |
| Equipment & Disposal | equipment | $1.23 – $2.13 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($6.62-$11.53 per square foot)
- Labor ($5.15-$8.97 per square foot)
- Supplies & Other ($14.71-$25.62 per square foot)
- Equipment & Disposal ($14.71-$25.62 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
How we price this
BuildX Pro researches and reviews the national price range for Frame Subfloor, then adjusts it to your ZIP code for local labor and material costs using the public data below. Last checked Sep 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 frame subfloor contractors in Seattle for personalized quotes based on your specific project.