“This project is a brilliant representation of the Port’s commitment to creating airport and labor jobs, not only to build it, but to eventually run businesses and services within it,” said Port of Seattle Commission President Hamdi Mohamed. “On top of that (pun intended), this is the first SEA project to implement the Port of Seattle’s Sustainable Evaluation Framework, supporting the Port’s Century Agenda goal of becoming the greenest and most energy-efficient port in North America.”  

Woods Bagot was represented by principals Matt Ducharme, Design Director-North America, Katy Mercer, Interior Design Leader-North America and project manager Valentino Del Rio. They joined Port of Seattle Commission President Hamdi Mohamed, Executive Director Steve Metruck, SEA Managing Director Lance Lyttle, Seattle Building Trades Executive Secretary Monty Anderson, Turner Construction Vice President & Construction Executive Kevin Stilwell, and a representative from Apex Steel. 

Valentino DelRio, Senior Associate and Project Manager shared, “Our vision for this project was to craft a first-class experience that embodies the essence of the Pacific Northwest. We drew inspiration from the region’s natural beauty, incorporating local stones and woods throughout the concourse and mezzanine levels. These materials bring warmth and authenticity to the space, creating a uniquely Seattle atmosphere. The centerpiece of our design is the ‘Tree at C,’ a stunning structure made from Western Hemlock. It rises organically from the Grand Staircase, its branches extending across the ceiling to form a protective canopy. This architectural feature not only serves as a focal point but also complements the innovative electrochromic façade. Together, these elements blur the line between interior and exterior, inviting nature in while offering expansive views of the surrounding landscape. Through this design, we’ve created a space that’s not just a transit point, but a destination that celebrates the natural splendor of the Pacific Northwest.” 

Working closely with the Port, the collaborative design team has reimagined the concourse, creating an intuitive journey, sense of calm, and climate consciousness through the central concept of “Bringing in, seeing out.” The four new floors will add 13 new dining and retail spaces, additional premier lounge space, an airfield viewing platform referred to as the “Lookout at C”, and a variety of sought-after services and amenities. The expansion also encompasses office space for airport businesses, airlines, and the TSA. 

“The Concourse C Expansion project will be more than just a transit hub—it will be a reflection of the world it serves. With amenities like sensory rooms, worship spaces and a parents suite; these spaces are designed to embrace the diverse backgrounds of all passengers. We aim to create an authentic experience where every traveler finds a sense of belonging, and every corner tells the story of the place it represents” added Katy Mercer, Principal and Interior Design Leader, North America.

The C Concourse Expansion is estimated to be completed just ahead of the 2026 World Cup tournament being hosted in part in Seattle.

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Agna Brayshaw
Content and Communications Leader (North America)