AKA: IDX Tower, Downtown, Seattle, WA; Fourth Avenue and Madison Street Office Building, Downtown, Seattle, WA

Structure Type: built works - commercial buildings - office buildings

Designers: Flack + Kurtz, Incorporated, Mechanical Engineers (firm); Kendall/Heaton Associates, Incorporated, Architects (firm); PCL Construction Services, Incorporated, Building Contractor (firm); Skilling Ward Magnusson Barkshire, (SWMB), Incorporated, Engineers (firm); Zimmer Gunsul Frasca (ZGF) Partnership (firm); Arthur J. Barkshire (structural engineer); Peter Flack (mechanical engineer); Robert J. Frasca (architect); Brooks R. Gunsul (architect); James E. Heaton (architect); Gerald Douglas Hines (developer); William D. Kendall Jr. (architect); Norman David Kurtz (mechanical engineer); Jon Magnusson (structural engineer); John Bower Skilling (structural engineer); William D. Ward (structural engineer); Norman Cunningham Zimmer (architect)

Dates: constructed 2002

40 stories, total floor area: 845,533 sq. ft.

view all images ( of 3 shown)

925 4th Avenue
Downtown, Seattle, WA 98104-1157

OpenStreetMap (new tab)
Google Map (new tab)
click to view google map
Google Streetview (new tab)
click to view google map

Building History

The Houston-based development and management firm, Hines, founded by Gerald D. Hines (1925-2020) in 1957, developed the office building at 4th and Madison.

In 2021, Clarion Partners and Nuveen Real Estate owned the 4th and Madison Building.

Building Notes

According to the Hines Interests Limited Partnership web site on the building, it contained 845,533 square feet and occupied a 44,000-square-foot (approximately 1-acre) lot. It stood 512 feet tall, with 40 stories above grade and 4 below. Each floor plate averaged about 25,000 square feet. A underground garage had space for 464 vehicles.

PCAD id: 8782