Roof repair cost in Seattle (2026):
repairs, moss and gutters
HOW MUCH DOES ROOF REPAIR COST IN SEATTLE?
Most roof repairs in Seattle cost $454 to $2,655, with an average of $1,540 (Angi, August 2026). Moss removal is often a separate job, priced at $0.20–$0.75 per square foot of roof (HomeGuide). Washington sales tax applies to the whole repair bill, 10.55% in Seattle.
Seattle vs. the national average
Angi publishes roof repair prices for Seattle and for the whole country. Seattle's average comes out about 31% higher.
| Angi data | Average | Typical range |
|---|---|---|
| Seattle, WA | $1,540 | $454–$2,655 |
| United States | $1,173 | $395–$1,967 |
Angi notes that "Seattle's wet weather can cause serious roof damage," and says labor makes up about half of a repair bill. For national prices from more guides, see our roof repair cost guide.
A real example: moss, leaves and clogged gutters
These photos show one roof in the Seattle area. Moss grows between the shingle rows, branches hang over the roof, and the gutters are packed with moss and debris. We don't know what this cleanup cost, so the prices further down come from published sources.
Seattle roof repair cost by type of repair
| Repair | Seattle cost (Angi) |
|---|---|
| Vent repair | $75–$250 |
| Flashing replacement | $200–$500 |
| Ridge cap repair | $200–$750 |
| Roof leak | $350–$1,550 |
| Soffit and fascia repair | $600–$6,000 |
| Hail damage repair | $700–$4,000 |
By size of the damaged area
| Area to repair | Seattle cost (Angi) |
|---|---|
| 100 sq ft | $450–$1,800 |
| 200 sq ft | $900–$3,600 |
| 500 sq ft | $2,250–$9,000 |
| 1,000 sq ft | $4,500–$18,000 |
When the damaged area gets close to 1,000 sq ft, compare the quote with a full replacement. See roof replacement cost in Seattle.
Roof moss removal cost
| Job | Cost (HomeGuide) |
|---|---|
| Moss removal | $0.20–$0.75 per sq ft |
| Roof cleaning, whole job | $250–$600 |
| Moss treatment | $100–$250 |
| Zinc strips (material) | $30–$60 per 50-ft roll |
What that means for a typical Seattle roof: Angi puts the average Seattle roof at about 1,800 sq ft. At $0.20–$0.75 per sq ft, moss removal on a roof that size comes to about $360–$1,350 (our calculation).
Three ways moss is removed
| Method | What the sources say | Watch out for |
|---|---|---|
| Brushing it off by hand | The University of Washington's Miller Library calls physical removal "most environmentally sound." Oregon State University suggests a long-handled scrub brush when in doubt. | Slow, and a wet, mossy roof is slippery. |
| Moss killer, then wash or sweep off | Oregon State University describes zinc sulfate powder mixed with water and applied with a pump sprayer. Some crews spread a powdered moss killer and remove the dead moss later. | "Do not use if your roof has copper gutters, downspouts or flashing — zinc corrodes copper" (OSU). Keep runoff away from plants, ponds and water supplies (UW). |
| Pressure washing | HomeGuide reports that the Roof Cleaning Institute and the Asphalt Roofing Manufacturers Association "strongly advise against pressure washing a shingle or tile roof." | OSU: "improper technique can damage shingles." Ask how the crew will clean before you hire them. |
To slow moss down afterwards, some homeowners add zinc strips. The UW library quotes Oregon State University: "Zinc strips are usually considered the long-term solution to controlling mosses."
Gutter cleaning cost in Seattle
Moss and leaves from the roof end up in the gutters, as in the photos above. Angi publishes Seattle gutter cleaning prices:
| Home | Seattle (Angi) | U.S. (HomeGuide) |
|---|---|---|
| 1 story | $157–$200 | $70–$200 |
| 2 stories | $188–$275 | $100–$275 |
| 3 stories | $234–$311 | $130–$400 |
| Average / typical | $218 avg | $100–$250 |
- Angi: "Evergreen trees nearby can raise cleaning frequency and cost."
- Angi: clogged or neglected gutters can cost 10% to 50% extra to clear, and steep roofs can add about 15%.
- HomeGuide: most gutters need cleaning 2 to 3 times a year. Clearing clogged downspouts adds $60–$150.
Sales tax and hiring a roofer in Washington
A roof repair on a home is taxed like the rest of construction work in Washington: the contractor collects retail sales tax "on the gross contract price," labor included (Washington Department of Revenue). In Seattle the rate is 10.55% since January 1, 2026.
| Example | Amount |
|---|---|
| Seattle average roof repair (Angi) | $1,540 |
| Sales tax at 10.55% | + $162 |
| Total if tax is not already included | $1,702 |
- Look the roofer up on L&I's Verify a Contractor tool: active license, bond, insurance and past violations.
- For jobs of $1,000 or more on a home, the contractor must give you a written disclosure statement before work starts (RCW 18.27.114).
- For moss work, ask which method the crew will use and whether your gutters or flashing are copper.
Frequently asked questions
How much does roof repair cost in Seattle?
Angi puts the typical Seattle roof repair at $454 to $2,655, with an average of $1,540 (August 2026). Washington sales tax of 10.55% in Seattle applies to the whole bill.
How much does roof moss removal cost?
HomeGuide lists $0.20 to $0.75 per square foot. For a roof of about 1,800 sq ft, Angi's average for Seattle, that works out to about $360 to $1,350.
Should I pressure wash moss off my roof?
Usually not. HomeGuide reports that the Roof Cleaning Institute and the Asphalt Roofing Manufacturers Association strongly advise against pressure washing shingle or tile roofs. Oregon State University says improper technique can damage shingles and suggests a long-handled scrub brush when in doubt.
How much does gutter cleaning cost in Seattle?
Angi lists $157 to $311, with an average of $218 (August 2026). Clogged or neglected gutters can cost 10% to 50% more.
Is sales tax charged on roof repairs in Washington?
Yes. The Washington Department of Revenue says contractors collect retail sales tax on the gross contract price for work on a homeowner's property, so it applies to labor and materials.
Sources
- Angi — How Much Does Roof Repair Cost in Seattle, WA? (updated Aug 4, 2026)
- Angi — How Much Does Roof Repair Cost? (updated Aug 3, 2026)
- Angi — How Much Does Roof Replacement Cost in Seattle, WA? (average roof size; updated Aug 4, 2026)
- Angi — How Much Does Gutter Cleaning Cost in Seattle, WA? (updated Aug 5, 2026)
- HomeGuide — Roof Cleaning Cost (Apr 19, 2024)
- HomeGuide — Gutter Cleaning Cost (Nov 7, 2025)
- Oregon State University Extension — How to control roof moss and prevent long-term damage
- University of Washington, Elisabeth C. Miller Library — On roof moss removal
- Washington Department of Revenue — Custom construction
- Washington Department of Revenue — Local sales tax change, Seattle, effective January 1, 2026
- Washington State Legislature — RCW 18.27.114, Disclosure statement
All sources accessed October 2, 2026. Contractor checks: Washington L&I — Hiring a contractor.
These figures are estimates compiled from the published sources above. They are not quotes and can't account for your roof or your contractor. Tax rules can change, so confirm them with your roofer. Get written estimates from licensed, bonded and insured roofers before deciding. See our disclosure and disclaimer.