Project Description: The project consists of reroofing and related building envelope improvements at Seattle City Hall, including green roof replacement, waterproofing, roof drainage repairs, curtain wall window panels replacement, installation of fall protection and bird deterrent systems, and associated maintenance improvements necessary to restore and extend the service life of the facility.Engineer's Estimate: Base Bid: $4,552,000.00Bid Alternate #1 Surface Applied Glaze: $28,721.00Bid Alternate #2 Waterproof Membrane Augmentation; RT-3: ($48,332.00)Bid Alternate #3 New PVC Roofing Membrane; RT-4: $150,673.00Bid Alternate #4 New PVC Roofing Membrane; RT-5: $72,758.00Project Location: Seattle City Hall 600 4th Ave, Seattle, WA 98104

The City of Seattle is accepting electronic bid submissions. Bidders shall create a FREE account with OpenGov Procurement by signing up at https://procurement.opengov.com/signup. Once you have completed account registration, browse back to this page, click on "Draft Response", and follow the instructions to submit the electronic bid.

Release Project Date:August 26, 2026Pre-Bid Meeting #1 (Mandatory for bidders to attend at least one of the 3 pre-bid meetings) (Mandatory):September 2, 2026, 12:00pmThis 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 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.Pre-Bid Meeting #2 (Mandatory for bidders to attend at least one of the 3 pre-bid meetings) (Mandatory):September 8, 2026, 11:00amThis 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 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.Pre-Bid Meeting #3 (Mandatory for bidders to attend at least one of the 3 pre-bid meetings) (Mandatory):September 10, 2026, 11:00amThis 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 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:September 17, 2026, 5:00pmBid Open Date:September 23, 2026, 2:00pm

Please see the Attachments section for specifications and attachments.

Zain AldahlakiSr. Project Manager700 5th Ave Suite 52Seattle, WA 98104Email: zain.aldahlaki@seattle.govPhone: (206) 735-8730

Pamela HonmaSr. Construction Contracts Specialists700 5th AveSeattle, WA 98101Email: pamela.honma@seattle.govPhone: (206) 733-9941