Seattle-Tacoma International Airport expansion project reaches $260 million for Turner Construction

Turner Construction’s expansion of the C Concourse at Seattle-Tacoma International Airport has reached the end of vertical construction, with steel topping out completed and a $260 million milestone reached. 

The project, set for completion in 2026, spans six stories and over 226,000 square feet, adding four additional levels to the existing building and offering an elevated flyer experience. Key project highlights include a meditation room, a rooftop photovoltaic array, a nursing room, and two airfield observation decks. The new floors will also expand the airport’s dining and retail options, add additional seating, and provide 1,300 sq ft of extra waiting area for passengers. 

Photo source: Turner Construction

Bill Ketcham, Vice President and General Manager at Turner Construction Company, states, “We are proud to celebrate the topping out of this transformative project at Seattle-Tacoma International Airport. This milestone reflects the dedication of our team and partners, including our collaboration with the Port of Seattle, and underscores our shared commitment to sustainability. This project exemplifies how we can construct essential infrastructure that benefits both travelers and the environment.”

This is the first project at Sea-Tac to include the Port of Seattle’s Sustainable Evaluation Framework. The project also adheres to the Port Century Agenda’s sustainability goals. The construction project is set to achieve LEED Gold status, which reflects its innovative integration of energy-conscious systems and eco-friendly elements. LEED is a globally recognized scoring system for the sustainability of buildings by the U.S. Green Building Council (USGBC). 

Want to stay updated on the latest sustainable construction projects? Subscribe to our weekly newsletter to get them delivered straight to your inbox!

Share Your Thoughts

9 powerful biohacks every construction pro needs to boost energy and longevity

April 23, 2025

Combat workplace stress and fatigue with biohacks like NAD+ supplements to repair cells and contrast therapy to improve recovery.

Read more

The best cooking oils for hardworking crews (and which ones to avoid)

April 23, 2025

Cooking oils like avocado and coconut have high smoke points, but avoid options like canola and vegetable oils for their health risks.

Read more

The future of sustainable, off-grid living starts with Haus.me

April 22, 2025

Haus.me creates durable modular homes made of 3D-printed polymer and tempered glass, ranging from 120 to 1,600 sq. ft., starting at $35,000.

Read more

Humanity and AI: How Paul Doherty sees AI reshaping the future of construction

April 22, 2025

Paul Doherty and The Digit Group have blended AI with real estate development to open doors and let everyone be a little more human, on and off-site.

Read more