Business Development
Contract Compliance
Chinook Building
401 Fifth Avenue, 3rd Floor
Seattle, WA 98104

General Contact:
 Send a question:
Phone: 206-263-9717
TTY Relay: 711

Small Contractor and Supplier Certification

Select Certification Method:

 CPA Affidavit Method (preferred)

Traditional Method

Complete and submit the following forms:

  • Business Application
  • CPA Affidavit (Certifying Business Size)
  • CPA Affidavit (Certifying each Owner's Personal Net Worth)
  • Review complete in 7 business days or less

download each file below separately

Certification ApplicationCPA Affidavit FormCPA Business Size Form

Complete and submit the following forms:

  • Business Application
  • Personal Net Worth form for each owner
  • Past 3 years Company Federal Income Tax Statement (all schedules)
  • Minimum 15 business day review period

download packet

SCS Application Packet: Traditional Method

SCS program details

 Additional program information
Certification FAQ's

Frequently Asked Questions

Compare Certification Methods

Participating Agencies: King County, Port of Seattle

Register for Bid and Proposal email notification:

King County - OVR System
Port of Seattle - PRMS System