Basic
$3.89 – $8.76 per sq ft
Three-ply built-up roof with fiberglass ply sheets in hot asphalt, flood coat with gravel, new gravel stop
How Much Does Built Up Roof Cost in Seattle, Washington?
Install a new multi-ply built-up (tar and gravel) flat roof over an existing deck, per square foot, tear-off extra.
Built Up Roof in Seattle, Washington typically costs $4.58 to $10 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Built Up Roof in Seattle, Washington
$4.58 – $10
per sq ftPrices in Seattle are 19.0% higher than the national average for built up roof.
National average: $4 – $9 per sq ft
What you get at each price level
Standard
$4.58 – $10 per sq ft
Four-ply fiberglass felts in hot asphalt over a base sheet, flood coat with embedded gravel, new gravel stop and flashings
Premium
$5.73 – $13 per sq ft
Four plies plus base sheet over new cover board, flood coat and gravel, new edge metal, re-flashed curbs and drains
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $1.87 – $4.21 | sq ft |
| Labor | labor | $1.88 – $4.22 | sq ft |
| Supplies & Other | supplies | $0.50 – $1.12 | sq ft |
| Equipment & Disposal | equipment | $0.33 – $0.75 | sq ft |
Prices adjusted for Seattle local market conditions.
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($1.80-$4.05 per square foot)
- Labor ($1.40-$3.15 per square foot)
- Supplies & Other ($0.48-$1.08 per square foot)
- Equipment & Disposal ($0.32-$0.72 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
- Built-Up Roofing (BUR): Specs, Cost & Installation Guide | RoofingStuffs, RoofingStuffs, retrieved Nov 2026
- Built-Up Roof (BUR): Cost, Lifespan & Alternatives (2026) | RoofToYard, RoofToYard, 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 built up roof contractors in Seattle for personalized quotes based on your specific project.