Basic
$0.19 – $0.58 per sq ft
Soft wash with a standard algaecide mix in one application, loose moss brushed off, plants pre-wetted and rinsed
How Much Does Clean Roof Shingles Cost in Seattle, Washington?
Soft-wash cleaning of an asphalt shingle roof to remove algae, moss and stains.
Clean Roof Shingles in Seattle, Washington typically costs $0.23 to $0.68 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Clean Roof Shingles in Seattle, Washington
$0.23 – $0.68
per sq ftPrices in Seattle are 19.0% higher than the national average for clean roof shingles.
National average: $0.20 – $0.60 per sq ft
What you get at each price level
Standard
$0.23 – $0.68 per sq ft
Soft wash at a mix strength suited to asphalt shingles, surfactant for dwell, moss removed by hand, plantings wetted and rinsed
Premium
$0.29 – $0.86 per sq ft
Soft wash with longer dwell plus a second spot application on heavy streaks, moss hand-removed, plants covered, downspouts rinsed
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.09 – $0.28 | sq ft |
| Labor | labor | $0.09 – $0.27 | sq ft |
| Supplies & Other | supplies | $0.02 – $0.08 | sq ft |
| Equipment & Disposal | equipment | $0.02 – $0.05 | sq ft |
Prices adjusted for Seattle local market conditions.
Clean Roof Shingles photo examples
Gray asphalt shingle roof slope with dark algae streaks running down it
Photo: Mcbooz · CC BY-SA 3.0 · Source
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Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($0.09-$0.27 per square foot)
- Labor ($0.07-$0.20 per square foot)
- Supplies & Other ($0.02-$0.08 per square foot)
- Equipment & Disposal ($0.02-$0.05 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
- How Much Does Roof Cleaning Cost? - This Old House, This Old House, 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
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