City Hall Plaza waterproofing membrane replacement
Seattle City Hall Plaza Waterproofing Replacement, Solicitation 241035, issued by City of Seattle.
At a glance
Seattle Public Works is replacing the waterproofing membrane, paving, and landscaping at Seattle City Hall's elevated plaza, plus installing a new flagpole. Work occurs in three phases over 2026–2027 to maintain site access. Budget is approximately $6.9 million.
Key facts
- Issuing agency
- City of Seattle
- Solicitation number
- 241035
- Type
- purchase
- Posted
- Mar 20, 2026
- Response deadline
- May 13, 2026, 5:00 PM EDT
- Pre-bid meeting
- Mar 26, 2026, 2:00 PM EDT
- Place of performance
- King County, WA
Official description
Solicitation #PW#2025-029. Issued by Public Works. 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
Respond to this bid
This solicitation is administered by the issuing agency through its OpenGov procurement portal. The official documents, any addenda and updates, and the procurement officer’s contact information are all posted there, and bid submission happens there, not on SledAtlas.
The direct link to the source posting (documents, addenda, updates, and the procurement contact) is free with a SledAtlas account. Sign in or create a free account.