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Get certified as a Small Contractor and Supplier (SCS) and increase the competitiveness of your firm as a contractor, consultant or supplier for King County contracts.

​Select a Method

CPA Affidavit Method (preferred)

Complete and submit the following forms (download each file below separately):

  • Business Application (download)
  • CPA Affidavit (Certifying each Owner's Personal Net Worth) (download)
  • CPA Affidavit (Certifying Business Size) (download)
  • Avg. review period: Less than 10 business days

Traditional Method

Complete and submit the following forms:

  • Business Application (download)
  • Personal Net Worth form for each owner (download)
  • Past 3 years Company Federal Income Tax Statement (all schedules)
  • Avg. review period: 15 to 30 business days

Right to Privacy

King County, as a government entity, conducts public business and records related to the business of King County are generally available for public review. King County is committed, to the extent allowable by law, to protect and secure personal information contained in King County records. This privacy commitment must be balanced with the rights of public access under chapter 42.56 RCW, Washington Public Records Act, consistent with chapter 2.14 of the King County Code and any other applicable federal, state, and local statute or regulation.

You may read the King County Privacy Policy here.

Questions about Certification?
(206) 477-9734

Business Hours

Monday - Friday
8 a.m. - 4:30 p.m.