Fourth & Columbia - Exterior

4th & Columbia Mixed-use Tower


Seattle, Washington



Collaborators +

Structural Engineering: Magnusson Klemencic Associates

Architectural: Graham Baba

Code/Life Safety: PCNA Group Consulting Engineers

Code/Life Safety: Pielow Consulting

Landscape Design: Site Workshop LLC

Lighting Design: Fisher Marantz Stone

Mechanical Engineering: MacDonald-Miller Facility Solutions, LLC

Mechanical & Electrical Engineering: CB Engineers

Project Size

1,650,000 square feet

Project Status

In Progress


Architecture, Planning

In Seattle, growing sustainably means that a city of eclectic culture, deep connection to nature, and diverse small businesses can maintain its uniqueness as it increases in density and international influence. At approximately 90 stories and 1,000 feet in height, the Fourth & Columbia Mixed Use Tower will be the one of the tallest buildings in the US, signaling Seattle’s arrival as a major city in the 21st Century with a skyline-scaled gesture of forward-thinking design. Conceived as vertically interlocking neighborhoods, the tower’s mix of retail, office, hotel, and residential uses activates a 24/7 downtown with spaces versatile enough to change with the ebb and flow of people in an evolving district.