Central West Headquarters Re-Roof

Agency: City of Seattle
State: Washington
Type of Government: State & Local
NAICS Category:
  • 238160 - Roofing Contractors
Posted Date: Jul 29, 2026
Due Date: Aug 19, 2026
Solicitation No: PW#2025-028
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Description


Project ID: PW#2025-028

Title: Central West Headquarters Re-Roof

Addenda: 1

Release Date: 7/29/2026

Due Date: 8/19/2026

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Central West Headquarters Re-Roof
Last updated by Addendum #1 on Jul 30, 2026 6:24 AM
Public Works
Project ID: PW#2025-028
Release Date: Wednesday, July 29, 2026
ยท Due Date: Wednesday, August 19, 2026 2:00pm
Posted Wednesday, July 29, 2026 6:00am
All dates & times in Pacific Time
Draft Response No Bid20 days, 19 hours, 36 minutes


Post Information

Posted At:Wed, Jul 29, 2026 6:00 AM
Sealed Bid Process:Yes (Bids Sealed / Pricing Sealed)
Private Bid:No
Overview


Summary

Project Description: RE-ROOF - REMOVE AND DISPOSE OF THE EXISTING BUILT-UP ROOF MEMBRANE DOWN TO THE EXISTING T&G WOOD DECKING AT HIGH ROOF AND BARREL VAULT. REMOVE AND DISPOSE OF BUILT-UP ROOF TO PLYWOOD DECK AT LOW ROOF. REMOVE AND DISPOSE OF CORRUGATED METAL SIDING AT GABLE ENDS OF VAULTED ROOF. INSTALL TAPERED POLYISOCYANURATE INSULATION, AND COVERBOARD. MECHANICALLY FASTEN THE FIRST LAYER OF INSULATION AND FULLY ADHERE THE SUBSEQUENT LAYERS. INSTALL NEW EPDM ROOF MEMBRANE AT FLAT ROOFS. INSTALL STANDING SEAM METAL ROOF AT VAULTED ROOF AND UNDERLAYMENT. RAISE PARAPET HEIGHT TO ACCOMMODATE NEW TAPERED INSULATION. INSTALL NEW SHEET METAL FLASHINGS AND PARAPET COPING. INSTALL SAFETY RAILS. INSTALL LADDERS.

BID ADDITIVE NO. 1: STRUCTURAL UPGRADES. INSTALL 5/8" PLYWOOD ROOF DIAPHRAGM.

Engineer's Estimate: $581,072.00 Additive #1: $137,616.00

Project Location: 1403 W Howe St Seattle WA 98119



Timeline

Release Project Date:
July 29, 2026
Pre-Bid Site Meeting #1 ( Mandatory for Bidders to attend at least 1 of the 2 Pre-Bid Meetings):
August 5, 2026, 11:00am
Pre-Bid Site Meeting #2 ( Mandatory for Bidders to attend at least 1 of the 2 Pre-Bid Meetings):
August 6, 2026, 1:00pm
Question Submission Deadline:
August 11, 2026, 5:00pm
Bid Open Date:
August 19, 2026, 2:00pm
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