Basic
$8.01 – $14 per sq ft
Polymer slate tiles in one width and a single color over synthetic underlayment, ice barrier at eaves where code requires, matching hip and ridge
How Much Does Synthetic Slate Roof Cost in Washington, District of Columbia?
Synthetic (polymer or composite) slate roofing installed over underlayment on a pitched roof, materials and labor, per square foot of roof.
Synthetic Slate Roof in Washington, District of Columbia typically costs $9.42 to $17 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Synthetic Slate Roof in Washington, District of Columbia
$9.42 – $17
per sq ftPrices in Washington are 5.0% higher than the national average for synthetic slate roof.
National average: $9 – $16 per sq ft
What you get at each price level
Standard
$9.42 – $17 per sq ft
Polymer slate tiles in mixed widths and a two-tone blend, synthetic underlayment, ice-and-water membrane at eaves and valleys
Premium
$12 – $21 per sq ft
Thicker polymer slate in mixed widths with deeper chiseled edges and multi-color blend, high-temp membrane at eaves and valleys
Cost Breakdown in Washington
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $4.25 – $7.56 | sq ft |
| Labor | labor | $3.28 – $5.82 | sq ft |
| Supplies & Other | supplies | $1.13 – $2.02 | sq ft |
| Equipment & Disposal | equipment | $0.76 – $1.34 | sq ft |
Prices adjusted for Washington local market conditions.
Synthetic Slate Roof photo examples
Composite slate tile roof with fading on a low-slope building
Photo: WereItNotSoSimple · CC BY-SA 4.0 · Source
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Cost Factors in Washington, District of Columbia
What Affects Pricing
- Materials ($4.05-$7.20 per square foot)
- Labor ($3.15-$5.60 per square foot)
- Supplies & Other ($1.08-$1.92 per square foot)
- Equipment & Disposal ($0.72-$1.28 per square foot)
Local Price Adjustments
Material costs5.0% above avg
Labor costs4.0% above avg
Frequently Asked Questions
References
- The Roofing Brief: 2026 roofing cost report, theroofingbrief.com, retrieved Nov 2026
- Landmark Roofing: Synthetic slate roofing cost, landmarkroof.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 Washington
Connect with local synthetic slate roof contractors in Washington for personalized quotes based on your specific project.