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One Union SquareDownload Project Factsheet
Official Name One Union Square
Type building
Status Completed
Country United States
State Washington
City Seattle
Street Address 600 University Street (Map)
Building Function office
Structural Material steel
Completion 1981
City Ranking #18 tallest in Seattle
Height: Architectural 139.0 meter / 456 feet
Height: To Tip 139.0 meter / 456 feet
Floors Above Ground 36
Floors Below Ground 2
Tower GFA 61,086 m² / 657,524 ft²
Companies Involved
Architect TRA Architects
Structural Engineer Magnusson Klemencic Associates
Main Contractor Hoffman Construction Co. of Washington