Verify your water damage or mold contractor's license in Spokane, Washington. Direct link to WA L&I Contractor Verify, what licenses to check, red flags, and how to confirm IICRC certification.
Go to lni.wa.gov and use 'Verify a Contractor/Tradesperson'
Search by business name, UBI number, or contractor registration number
Confirm the contractor registration is 'Active' and not suspended or revoked
Verify the contractor carries the required liability insurance and workers' compensation
For mold work, additionally request IICRC S520 certification — this is the primary competency signal in WA
Confirm the contractor follows WAC 296-843 hazardous substances protocols if significant mold is present
Cross-check IICRC certification at iicrc.org/find-an-iicrc-certified-firm
General Contractor Registration (required for all residential work)
Licensed by Washington State Department of Labor & Industries
Home Improvement Contractor Registration (for remodeling/repair)
Licensed by Washington State Department of Labor & Industries
IICRC S520 Mold Remediation Certification (industry standard)
Licensed by Washington State Department of Labor & Industries
Washington State has no standalone mold remediation license. All contractors performing restoration and reconstruction must be registered with WA L&I as General Contractors or Home Improvement Contractors. Mold remediation work is subject to Washington Administrative Code (WAC) 296-843 governing hazardous substances and WAC 296-62-07521 for worker protection.
Washington L&I references IICRC S520 and EPA Mold Remediation Guidelines as the industry standards for competent mold remediation. Puget Sound-area insurers widely require IICRC certification for claims. Washington's wet climate (particularly west of the Cascades) makes proper structural drying critical — always confirm IICRC WRT certification for drying technicians.
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