Seattle City Hall (SCH) Roof and Windows Replacement

The City of Seattle Department of Finance and Administrative Services is requesting sealed bids on roof and window replacement and related building envelope improvements at Seattle City Hall (600 4th Avenue), with bids due September 23, 2026 at 2:00 p.m. under PW#2026-011. This project is subject to the City of Seattle's Community Workforce Agreement and Priority Hire program, requiring a Women and Minority Business Enterprise (WMBE) Inclusion Plan with a 15% utilization target based on past performance for roofing-type projects; the inclusion plan must score a minimum of 10 points out of a maximum 16 points for responsiveness, addressing aspirational WMBE goals, business support strategies such as early retainage release and advance mobilization pay, and WMBE guarantees.

The scope encompasses green roof replacement, waterproofing, roof drainage repairs, curtain wall window panel replacement, fall protection and bird deterrent system installation, and associated maintenance to restore and extend facility service life. Specifications include EPDM and PVC roofing options, metal fabrications, flashing, glass glazing, painting, plumbing, and electrical systems, prepared by Bassetti Architects. The project is a lump sum contract with contract time specified in the Agreement Form; liquidated damages apply for failure to complete within the established timeframe.

The Engineer's Estimate for the base bid is $4.552 million, with four bid alternates: Surface Applied Glaze at $28,721 (additive); Waterproof Membrane Augmentation (RT-3) at $48,332 (deductive); New PVC Roofing Membrane (RT-4) at $150,673 (additive); and New PVC Roofing Membrane (RT-5) at $72,758 (additive). Bidders must provide a 5% bid guaranty and payment and performance bond, comply with prevailing wage requirements and paid sick and safe time ordinances (SMC 14.16 and RCW 49.46), submit a current Seattle Business License, and meet responsibility criteria under RCW 39.04.350. Bidders must complete prevailing wage training and submit a Bidder/Subcontractor List identifying subcontractors for HVAC, plumbing, electrical, structural steel, and rebar installation, or indicate self-performance. Mandatory pre-bid site inspections are scheduled for September 2, 8, and 10, 2026. Questions are due September 17, 2026.