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Official government websites use .gov

Website addresses ending in .gov belong to official government organizations in the United States.

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Forms

W-9 Taxpayer Identification (King County Substitute W-9) | Instructions for Businesses | Instructions for Individuals 

Consultant Disclosure Form

Responsibility Detail and Attestation Form (for use with non-construction solicitations advertised before Sept. 1, 2025)

Responsibility Detail Form (for use with non-construction solicitations advertised after Sept. 1, 2025)

Contract Crosswalk: Instructions | Template

Escalation Management: Instructions | Workbook

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