Basic
$5.84 – $12 per sq ft
Single-width synthetic slate shingles in one solid color, synthetic underlayment, metal drip edge, matching hip and ridge caps
How Much Does Composite Roof Cost in Seattle, Washington?
Install synthetic/composite polymer shingles (slate or shake look) on a residential roof, per sq ft of roof.
Composite Roof in Seattle, Washington typically costs $6.87 to $14 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Composite Roof in Seattle, Washington
$6.87 – $14
per sq ftPrices in Seattle are 19.0% higher than the national average for composite roof.
National average: $6 – $12 per sq ft
What you get at each price level
Standard
$6.87 – $14 per sq ft
Multi-width synthetic slate shingles in a blended color, synthetic underlayment with ice barrier at eaves, metal drip edge
Premium
$8.59 – $17 per sq ft
Thicker multi-width synthetic slate shingles with deeper texture in a multi-color blend, ice barrier at eaves and valleys, ridge vent
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $2.81 – $5.62 | sq ft |
| Labor | labor | $2.81 – $5.63 | sq ft |
| Supplies & Other | supplies | $0.75 – $1.50 | sq ft |
| Equipment & Disposal | equipment | $0.50 – $1 | sq ft |
Prices adjusted for Seattle local market conditions.
Composite Roof photo examples
Gray synthetic slate-look composite roof tiles on a low-pitched roof
Photo: WereItNotSoSimple · CC BY-SA 4.0 · Source
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Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($2.70-$5.40 per square foot)
- Labor ($2.10-$4.20 per square foot)
- Supplies & Other ($0.72-$1.44 per square foot)
- Equipment & Disposal ($0.48-$0.96 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 Composite Roof, then adjusts it to your ZIP code for local labor and material costs using the public data below. Last checked 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 composite roof contractors in Seattle for personalized quotes based on your specific project.