Washington State Convention Center Addition

Seattle, Washington

Project Size:

1,500,000 square feet

Project Status:

Anticipated Completion 2020

Associate Architect:


Replacing the Black Box

Civil Engineering Magazine, 1/5/16

Selected Awards

The 1.15-million square foot addition to the Washington State Convention Center marks a transformative moment in the history of downtown Seattle. Occupying a full city block, the building will function as a connecting hub for multiple urban districts, and redefine the long-anticipated mixed-use development zone north of the downtown retail core. The project’s contributions to the public realm are as massive as its scale, navigating a diverse mix of public-private intersections while catering to the next generation of convention delegates with expectations of a rich urban experience.

The building engages the urban form at all of its 8 levels, from the underground service and exhibit areas, to the street, to the skyline. Each façade presents a highly interactive, transparent edge, blurring the boundaries of the site with the city context and the building program. A glass-enclosed stair along Pine Street positions the interior circulation patterns at the edge of the building, creating dramatic west-facing views to the Pike Place Market and Puget Sound, and broadcasting the energy of convention visitors. A broad street plaza at the corner of Pine and 9th Avenue collects the activity of local residents and visitors alike. Open air terraces on all levels, designed to accommodate a variety of events, look out to iconic views at the center of the Seattle experience.

The project also includes two adjacent blocks of mixed-use co-development to the north, planned as a 530,000-gross square foot office tower and a 385-unit residential tower. Both rise over street-level podiums with retail opportunities.