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Procurement and Contract Services

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 June 1, 2015 the time for submission of A&E and Professional Services proposals is changed to 12:00 p.m. 
  • It is now easier to do business in King County. View 2015 First Quarter efficiency and equity improvements in the Procurement Reform Progress Report (398KB, PDF).
  • King County has implemented a Living Wage for certain contracts. Public Rulemaking is currently underway, and will complete by September 2015.
  • 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).
  • The Equal Benefits Worksheet and Declaration Form has been improved through language modifications providing further clarification. Please discard any old forms.
  • King County selected as founding member of Sustainable Purchasing Leadership Council.