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Procurement and Payables

Chinook Building
401 Fifth Avenue, 3rd Floor
Seattle, WA 98104

Phone: 206-263-9400 TTY Relay: 711
Fax: 206-296-7675/ 206-296-7676


King County utilizes contractors for construction, small works and for some service contracts. You must have a current contractors license with the State of Washington.

Most contracts are advertised Invitations to Bid (ITB's) placed in the Seattle Times and other local papers, and posted on our Web Site. To view latest advertisements, access Solicitations and search "Open" solicitations for "Construction". To determine the status of ITB's after the due date, whether solicitations have been closed, cancelled or awarded; access Solicitations and search "All" solicitations for "Construction".

Access Contractors > Small Works for more information.

Refer to the documents below to access the County's current Terms and Conditions:

Contract values vary from several thousand dollars for small works to multi-million dollar capital construction projects. Contract duration varies from a few weeks to several years. There are some which are titled Work Order contracts. These have a maximum dollar value and are awarded for up to three years, one year at a time.

Note: Documents listed in this page are available in Microsoft Office Word or Adobe Acrobat portable data format (PDF).

News and Features

  • Effective October 12, 2015 contract language includes King County Equal Benefits Ordinance requirements. Supplemental forms are only required for non-compliance. See instructions at the Equal Benefits Forms page.
  • Nominations are now closed for the King County Executive Small Business Awards occurring on Oct 13, 2015. Visit the website for award winners and event information.
  • King County has implemented a Living Wage for certain contracts. A hearing on the Public Rule is set for August 18, 2015. Rulemaking will be completed by September 2015.
  • It is now easier to do business in King County. View 2015 Second Quarter efficiency and equity improvements in the Procurement Reform Progress Report (499KB, PDF).
  • Effective June 1, 2015 the time for submission of A&E and Professional Services proposals is changed to 12:00 p.m. 
  • King County Solid Waste Division held a public workshop on upcoming landfill engineering projects for 2015-16. Download the Attendance List (330KB, PDF) and the PowerPoint Presentation (2.62MB, PDF).
  • King County selected as founding member of Sustainable Purchasing Leadership Council.