Aviation Pros
14 October 2026
The recently completed C Concourse Expansion at Seattle-Tacoma International Airport (SEA) incorporates all-electric building systems, solar power and passenger-focused design features as part of the Port of Seattle's ongoing Upgrade SEA modernization program.
Designed by The Miller Hull Partnership and Woods Bagot in collaboration with the Port of Seattle, the $399 million project expanded the existing concourse building from 81,000 to 229,500 square feet, adding four floors of passenger amenities, retail space and operational facilities. The expansion opened to travelers in June.
The project is the first at SEA to implement the Port's Sustainable Evaluation Framework and includes several environmental initiatives intended to establish a model for future airport development...
