City of Seattle

Seattle City Hall Plaza Waterproofing Replacement

PW#2025-029

Open

Department

Public Works

Mark Nakagawara - Deputy Division Director

Summary

Project Description: The work includes the removal and replacement of the existing waterproofing membrane, associated paving, and landscaping elements at the elevated plaza. Energy upgrades are not included in this bid. The project will be delivered in three (3) construction phases occurring over calendar years 2026-2027 to maintain site functionality and manage operational impacts. The work also includes the installation of one (1) new flagpole on the elevated plazaUpon completion of all construction activities, the plaza shall be fully restored to its original appearance.Engineer's Estimate: $6,864,865.00Project Location: Seattle City Hall 600 4th Ave, Seattle, WA 98104

Background

This Project is a Covered Project subject to the City of Seattle’s Community Workforce Agreement (CWA) and Priority Hire SMC 20.37. With the support of the mayor and City Council, the City of Seattle administers programs that support racial and economic equity through contracting. Priority Hire is one of these programs. Priority Hire provides people living in economically distressed communities, women, and people of color access to work on the city’s construction projects. It gives contractors access to these skilled workers

Important Dates

Release Date

3/20/2026

Pre-Proposal Date

3/26/2026

Q&A Deadline

4/24/2026

Proposal Deadline

5/13/2026

Contact Information

Project Contact

Paul Spivey

Strategic Advisor II

paul.spivey@seattle.gov

(206) 496-9915

700 5th Ave

Suite 5200

Seattle, WA 98101

Procurement Contact

Pamela Honma

Sr. Construction Contracts Specialists

pamela.honma@seattle.gov

(206) 733-9941

700 5th Ave

Seattle, WA 98101