King County RFPs

2026-2027 Small Works Roster

2026-2027 small works roster.

KCSO Uniforms & Related Items RFP

King County's E-Procurement Portal lists solicitation KC001652, titled KCSO Uniforms & Related Items, as a G&S Solicitation for the King County Sheriff's Office.

2026 Vendor Roster

2026 vendor roster.

Bae Parts and Tools

Purchase and delivery of BAE‑manufactured tools, components, and replacement parts required for the maintenance of BAE hybrid propulsion systems installed across Metro’s bus fleet.

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project BP #1 - EC/CM (Request for Qualifications)

The GC/CM is seeking an electrical subcontractor to participate as a member of a team during the preconstruction phase.

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project BP#4 (Request for Qualifications)

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project: BP #4 - SC/CM (Ground Improvements & Slurry Wall).

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project BP#3 (Request for Qualifications)

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project BP #3 - SC/CM (Demolition, Earthwork & Utilities).

King County Mouth of the Duwamish Combined Sewer Overflow (MDCSO) Wet Weather Treatment Station Project BP #2 - MC/CM (Request for Qualifications) RFP

Heavy Civil GC/CM Services for STP Treatment and Electrical Improvements (TEI) (Request for Proposals)

Heavy Civil GC/CM Project includes preconstruction and construction services for the South Treatment Plant (STP) Treatment and Electrical Improvements (TEI) Project.

Offsite Electrical Construction Work Order

King County is seeking a contractor for the Offsite Electrical Construction Work Order, identified as solicitation KC001746 and classified as a construction solicitation.

Offsite Electrical Construction Work Order RFP

King County is seeking a contractor for the Offsite Electrical Construction Work Order, identified as solicitation KC001746 and classified as a construction solicitation.

Infant Mental Health Consultant (Request for Proposal)

Infant mental health experts to provide consultation services.

Work Order Engineering Services for Solid Waste Landfill Systems

King County's KC001699 solicitation seeks work-order engineering services for solid waste landfill systems; the public notice expands this to multidisciplinary engineering services for solid waste landfill systems and facilities.

Promoting First Relationships-Agency Training Project 2027 (Request for Applications)

Promoting First Relationships-Agency Training Project 2027.

KCSO Uniforms & Related Items

King County's E-Procurement Portal lists solicitation KC001652, titled KCSO Uniforms & Related Items, as a G&S Solicitation for the King County Sheriff's Office.

A&E for the Renton Maintenance Facility Building C HVAC and Roof Replacement

King County is soliciting architecture and engineering services to replace the HVAC system and roof of Building C at the Renton Maintenance Facility.

Organizational Development Consulting Services - Supplemental (Request for Qualifications)

Provide organizational Development Consulting Services on an As-Needed Basis.

RFQ 4129 - On-Call Architectural & Engineering Consultant Services

The solicitation seeks on-call architectural and engineering consultant services for King County.

ITB-KCSO Vehicle Graphics

King County is soliciting bids from qualified firms to design, print, install, and remove graphic decals for King County Sheriff’s Office vehicles.

Roof Replacement and Repair Work Order 2026

King County is soliciting construction services for the Roof Replacement and Repair Work Order 2026.