Project Information

Bid Title

Seattle City Hall Plaza Waterproofing Replacement

Issuing Agency

City of Seattle

Location

Washington

Published Date

Apr 1, 2026

Closing Date

Apr 29, 2026

Government Level

State & Local

Status

Closed

Ref. #

PW#2025-029

Original Source

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Project Description

Project ID: PW#2025-029

Title: Seattle City Hall Plaza Waterproofing Replacement

Addenda: 1

Release Date: 3/20/2026

Due Date: 4/29/2026

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Seattle City Hall Plaza Waterproofing Replacement

Last updated by Addendum #1 on Apr 1, 2026 11:38 AM See what changed

Public Works

Project ID: PW#2025-029

Release Date: Friday, March 20, 2026

· Due Date: Wednesday, April 29, 2026 2:00pm

Posted Friday, March 20, 2026 6:00am

All dates & times in Pacific Time

Draft Response Events RSVP No Bid27 days, 19 hours, 39 minutes

Post Information

Posted At:Fri, Mar 20, 2026 6:00 AM
Sealed Bid Process:Yes (Bids Sealed / Pricing Sealed)
Private Bid:No

Overview

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 plaza

Upon completion of all construction activities, the plaza shall be fully restored to its original appearance.

Engineer's Estimate: $6,864,865.00

Project 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

Timeline

Release Project Date:

March 20, 2026

1st Pre-Bid Meeting (Bidder must attend one of the two mandatory Pre-Bid Meeting) (Mandatory):

March 26, 2026, 11:00am

This is a MANDATORY pre-bid site inspection/walk for this project. All those that wish to bid on the project will need to attend one site walk.

Please meet at Seattle City Hall located at 600 4th Ave, Seattle, WA 98104. Please meet on the west side at the top of the grand stairway in the main lobby facing 5th Avenue. Please note that parking may be limited and will most likely require payment. If more than one person from the same entity is attending, we encourage carpooling where possible.

2nd Pre-Bid Meeting (Bidder must attend one of the two mandatory Pre-Bid Meeting) (Mandatory):

March 31, 2026, 11:00am

This is a MANDATORY pre-bid site inspection/walk for this project. All those that wish to bid on the project will need to attend one site walk.

Please meet at Seattle City Hall located at 600 4th Ave, Seattle, WA 98104. Please meet on the west side at the top of the grand stairway in the main lobby facing 5th Avenue. Please note that parking may be limited and will most likely require payment. If more than one person from the same entity is attending, we encourage carpooling where possible.

Question Submission Deadline:

April 23, 2026, 5:00pm

Bid Open Date:

April 29, 2026, 2:00pm

Commodity Codes

• NAICS 236220Commercial and Institutional Building Construction

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