One Union Square
Location: Seattle, Washington
Owner: UNICO Properties, Inc.
Architect: TRA Architects
Contractor: Hoffman Construction Company
Description: This 38-story tower in downtown Seattle contains 810,000 square feet of rentable office space and cost $33 million to construct in 1980. The slip-formed reinforced concrete core supports the structural steel frame and aluminum and glass curtain wall. The walls on the lobby floor are clad with highly-polished Brazilian granite and trimmed with stainless steel.