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  5. ›REBID Seattle City Hall Plaza Waterproofing Replacement

City of Seattle·Washington

REBID Seattle City Hall Plaza Waterproofing Replacement

Closes 9/2/2026$6M – $8MRequest for Proposal
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Description

The City of Seattle is seeking a contractor to renovate the Seattle City Hall Plaza, including the relocation of a Japanese maple tree. The project involves preparing a structurally stable root containment system, improving the overall health of the tree, and replanting it in its original location after construction is completed. The contractor will need to collaborate with the project team to solidify means and methods, communicate clearly and transparently, and approach the assignment with utmost quality, patience, and care. The project requires a high level of expertise in tree relocation and care, as well as experience with complex construction projects. • The contractor will be responsible for preparing a structurally stable root containment system for the Japanese maple tree. • The contractor will need to improve the overall health of the tree through PHC treatments and pruning. • The contractor will need to replant the tree in its original location after construction is completed. • The contractor will need to maintain and monitor the tree for five years after construction to ensure reestablishment. • The contractor will need to collaborate with the project team to solidify means and methods, communicate clearly and transparently, and approach the assignment with utmost quality, patience, and care.

Attached files

The solicitation documents live at the source — open the bid source above to download them.

Contact

Paul Spivey(Senior Project Manager)

[email protected]

(206) 496-9915

Key dates

Opened
7/20/2026
Questions due
8/6/2026
Closes
9/2/2026

Last updated

Details

Type
Request for Proposal
Industry
Construction
NAICS
561730
Solicitation №
PW# 2025-029

Budget estimate

$6,000,000 – $8,000,000

Based on the engineer's estimate of $6,864,865.00 for the project, it is likely that the budget for this opportunity will be in the range of $6,000,000 to $8,000,000. This estimate takes into account the complexity of the project, the need for specialized tree relocation services, and the overall scope of work.

AI estimate from the solicitation

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