Basic
$9.73 – $29 per sq ft
Uniform gray natural slate about 1/4 in. thick, copper nails, 30 lb felt, ice barrier where code requires, new flashings
Photo: Øyvind Holmstad · CC BY-SA 4.0 · Source
How Much Does Slate Roof Cost in Seattle, Washington?
Slate Roof: national installed price range, materials and labor breakdown, and local pricing by ZIP code.
Slate Roof in Seattle, Washington typically costs $11 to $34 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Slate Roof in Seattle, Washington
$11 – $34
per sq ftPrices in Seattle are 19.0% higher than the national average for slate roof.
National average: $10 – $30 per sq ft
What you get at each price level
Standard
$11 – $34 per sq ft
Select natural black slate about 1/4 in. thick, copper nails, synthetic underlayment, ice barrier at eaves, new flashings
Premium
$14 – $43 per sq ft
Mixed-color natural slate in gray, green and rust tones, copper nails, synthetic underlayment, copper valley and step flashing
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $4.68 – $14 | sq ft |
| Labor | labor | $4.69 – $14 | sq ft |
| Supplies & Other | supplies | $1.25 – $3.74 | sq ft |
| Equipment & Disposal | equipment | $0.83 – $2.50 | sq ft |
Prices adjusted for Seattle local market conditions.
Slate Roof photo examples
Overlapping natural slate roof tiles in mixed gray, rust and green tones
Photo: Øyvind Holmstad · CC BY-SA 4.0 · Source
Find a pro to do thisRounded-edge slate roof tiles laid in overlapping rows
Photo: Øyvind Holmstad · CC0 · Source
Find a pro to do thisDark gray slate roof surface on a pitched roof
Photo: Michal Klajban · CC BY-SA 4.0 · Source
Find a pro to do this
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($4.50-$13.50 per square foot)
- Labor ($3.50-$10.50 per square foot)
- Supplies & Other ($1.20-$3.60 per square foot)
- Equipment & Disposal ($0.80-$2.40 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
- This Old House - Slate Roof Cost (2026), This Old House, retrieved Nov 2026
- Roof Medic - Slate Roof Cost 2026, roofmedic.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 slate roof contractors in Seattle for personalized quotes based on your specific project.