Fourth and Madison Building

The Fourth and Madison Building (formerly the IDX Tower) is a 40-story skyscraper in downtown Seattle, Washington.^[5] The building is located at 925 Fourth Avenue, at the intersection with Madison Street. Upon its completion in 2002, the late-modernist highrise was Seattle's first building to exceed 500 ft (150 m) in over a decade.

Fourth and Madison Building
Location within downtown Seattle
Former names	IDX Tower
General information
Type	Commercial offices
Location	925 Fourth Avenue Seattle, Washington
Coordinates	47.605498°N 122.333032°W / 47.605498; -122.333032
Construction started	2000
Completed	2002
Owner	TIAA-CREF
Height
Roof	156.06 m (512.0 ft)
Technical details
Floor count	Above ground: 40 Below ground: 2
Floor area	845,000 sq ft (78,500 m2)
Lifts/elevators	22
Design and construction
Architect(s)	Zimmer Gunsul Frasca Partnership Kendall/Heaton
Developer	Hines Interests Limited Partnership
Structural engineer	Magnusson Klemencic Associates
Main contractor	PCL Construction
Website
fourthandmadison.com
References
[1][2][3][4]

In 2007, Fourth and Madison was awarded the BOMA International Office Building of the Year Award in the 500,000–1,000,000 sq ft (46,000–93,000 m²) category.^[6]

The rooftop garden on the seventh floor is a privately owned public open space (POPOS).^[7]

Construction of the foundation required shoring around the Great Northern Tunnel and Downtown Seattle Transit Tunnel. The tower also cantilevers 12 feet (3.7 m) over the Downtown YMCA.^[8]