Miller Hull

Port of Seattle awards C1 Building Expansion at SEA Airport to Miller Hull and Woods Bagot

2-10-2021 | Press Releases


Seattle, WA – The Port of Seattle has hired The Miller Hull Partnership, LLP and Woods Bagot as joint project design leaders to create a dynamic, performative, and sustainable expansion to its C1 building. This collaboration of Woods Bagot, a global firm with a world-class aviation portfolio, and Miller Hull, an internationally recognized architecture firm rooted in the Pacific Northwest and known for sustainable design, will significantly elevate SEA Airport’s customer experience.

The last decade has seen rapid passenger growth, which the 110,000-square-foot, $340 million expansion extension is designed to accommodate. Supported by a diverse team of local experts, Miller Hull and Woods Bagot are creating an amazing destination retail experience whose rich array of local shopping and dining eating will attract and retain passengers. The projected completion date is 2027.

Diversity, performance, sense of place and sustainability are the driving design principles.

The Port and the design team are committed to advancing equity and addressing contracting disparities by increasing the participation of Women and Minority Business Enterprises (WMBE) and other disadvantaged firms. The design team is drawing upon a diverse pool of local talent to the aspirational goal of 15% WMBE for the design procurements.

The birthplace of Jimi Hendrix and home of Kurt Cobain, Seattle is known for its groove. The musical experience will begin right here, where live music will be performed on a new stage at the heart of the concourse. The performative nature of the concourse will be amplified by outstanding environmental and commercial goals.

Sense of Place: Experiencing the Northwest Pacific
Passengers arriving at C1 will have no doubt as to where they are. Through an interplay of local materials, references to nature, and events, the expansion will express the natural beauty of the Pacific Northwest, its lively culture, its eating and drinking scene, and its vibrant economy. The retail market will draw inspiration from Seattle’s beloved Pike Place Market, with live performances celebrating the City’s musical culture.

Sustainability is at the heart of the airport’s – and Seattle’s – agenda for the future. The C1 Building Expansion is the first project to implement the Port’s new Sustainable Project Framework. Targeting LEED Silver certification, the framework supports early integration of sustainability in capital projects with a view to meeting the Century Agenda goals. Miller Hull, the architect of the Living Building Certified Bullitt Center, and Woods Bagot, a team member for SFO’s Harvey Milk Terminal 1, which will achieve LEED Gold, have proven experience in reducing operational and embodied carbon and water, and introducing biophilia to create buildings that improve the health of people and of the planet.

Located between Concourses C and D, the project will:

  • Add four additional floors at approximately 27,000 square feet each
  • Bring natural daylight and multi-level dining and retail to Concourse C
  • Build new restrooms, vertical circulation, and seating

Project Facts

Size: Four new floors at 27,000 square feet each
Projected cost: $340 million
Projected completion: 2027
Owner: Port of Seattle

Design Team

Architecture joint project design leaders: The Miller Hull Partnership, LLP and Woods Bagot
General contractor/construction management: Turner Construction
Structural and Civil Engineer: Magnusson Klemecic Associates
Mechanical, Plumbing and Sustainability Engineers: PAE
Electrical Engineer, Smoke Control, Airfield and Logistics: ARUP
Airport Dining and Retail Consultant: AirProjects
IT and Security: Moye Consulting
Wayfinding and Signage: Mayer/Reed
Code Compliance and Fire Protection: Jensen Hughes
Lighting Design: Dark|Light
Noise and Vibration and Vertical Transportation: The Greenbusch Group
Geotechnical Engineer: Hart Crowser, Inc.
Cost Advice: Cumming
Accessibility/ADA: Code Unlimited, Inc.
Site Investigations: Holt Services

About The Miller Hull Partnership, LLP
The Miller Hull Partnership, LLP is an internationally recognized architecture, planning, urban and interior design firm that designs dynamic and ecologically responsible buildings, working to create a regenerative and inclusive future through the built environment. The firm has a studio in Seattle and San Diego with work extending across typologies for public and private clients where people Live, Work, Learn, Gather and Serve. Miller Hull’s experience with the Port of Seattle includes the nearly complete International Arrivals Facility (with Clark Construction and SOM) to provide a Northwest sense of arrival within the design team, and the Maritime Innovation Center at Fisherman’s Terminal. Widely recognized for innovative, timeless designs and a partnership-driven practice, Miller Hull has received over 375 awards for design excellence, including the American Institute of Architects Firm Award and Architect 50’s Top Firm for Sustainability. For more information, visit

About Woods Bagot
Woods Bagot Global Studio continually expands and challenges the expectations of multi-disciplinary architectural practice in a fast-moving digital era. Its portfolio is worldwide in scope, diverse in scale and discipline, and encompasses some of the highest-profile projects currently underway in North America, Europe, Asia, Australia, and the Middle East— including SFO Harvey Milk Terminal 1, SFO Terminal 2, Midfield South Concourse at LAX, and Perth International Airport.  Above all, Woods Bagot prioritizes human experience, delivering engaging, future-oriented spaces that are designed around their occupants. For more information, visit

About the Port of Seattle
Founded in 1911 by a vote of the people as a special purpose government, the Port of Seattle’s mission is to promote economic opportunities and quality of life in the region by advancing trade, travel, commerce and job creation in an equitable, accountable and environmentally responsible manner. Our vision is to add 100,000 jobs through economic growth led by the Port, for a total of 300,000 Port-related jobs in the region, while reducing our environmental footprint. We are committed to creating opportunity for all, stewarding our environment responsibly, partnering with surrounding communities, promoting social responsibility, conducting ourselves transparently and holding ourselves accountable. For more information, visit

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Media Contacts

The Miller Hull Partnership, LLP
Amy Golden, Paxson Fay
718-924-4096 (Seattle)

Woods Bagot
Lucy Kenyon, Woods Bagot