Estimates only. Figures are based on regional data and industry surveys. Actual costs vary by scope, materials, and contractor. Always get at least 3 quotes before proceeding.

Mold Remediation Cost in Washington

Local price estimates for 15 Washington cities, adjusted for humidity levels and contractor market size. Select your city for a detailed breakdown.

Licensing in Washington

Washington State requires mold remediation contractors to hold a contractor registration with the Department of Labor and Industries. Verify at lni.wa.gov.

Typical Cost Ranges

ScopeAreaTypical Cost
Small / surface<10 sq ft$500 – $1,500
Medium10–100 sq ft$1,500 – $5,000
Large / structural100+ sq ft or HVAC$5,000 – $30,000+

Sources: EPA guidance, IICRC S520, industry surveys. Estimates as of 2026.

Frequently Asked Questions

How much does mold remediation cost in Washington?

Costs typically range from $1,500 to $5,000 for medium-sized jobs. Small surface mold starts around $500; large structural infestations can exceed $15,000. Costs vary by city — see local estimates below.

Should I get an inspection before hiring a remediation contractor?

Yes — an independent inspection defines the scope before you get quotes, and gives you an unbiased assessment not tied to a contractor's profit motive. Use an inspector who does not also offer remediation services.

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Cost Estimates by City in Washington

Seattle 20 contractors · 79% humidity Spokane 18 contractors · 61% humidity Tacoma 13 contractors · 78% humidity Vancouver 15 contractors · 75% humidity Bellevue 15 contractors · 80% humidity Kent 10 contractors · 78% humidity Everett 16 contractors · 81% humidity Renton 6 contractors · 79% humidity Spokane Valley 7 contractors · 62% humidity Federal Way 12 contractors · 78% humidity Yakima 15 contractors · 56% humidity Kirkland 9 contractors · 80% humidity Bellingham 15 contractors · 79% humidity Auburn 19 contractors · 77% humidity Kennewick 19 contractors · 55% humidity

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Cost estimates based on EPA guidance, IICRC S520 standards, and regional contractor market data. MoldGuide is a lead referral service and does not provide remediation services or guarantee any quoted price.