Fourth and Madison Building

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Height: Architectural 156.1 m / 512 ft
Height: To Tip 156.1 m / 512 ft
Floors Above Ground 40
Floors Below Ground 4
# of Elevators 16
Tower GFA 97,826 m² / 1,052,990 ft²


Official Name Fourth and Madison Building
Other Names IDX Tower
Structure Type Building
Status Completed
Country United States
City Seattle
Street Address & Map 925 4th Avenue
Postal Code 98104
Building Function office
Structural Material composite
  • Core: Reinforced Concrete
  • Columns: Steel
  • Floor Spanning: Steel
Energy Label ENERGY STAR Certified; LEED Gold O+M: Existing Buildings
Construction Start 2000
Completion 2003
Rankings Click arrows to view the next taller/shorter buildings
City Ranking #18 Tallest in Seattle

Companies Involved

Developer Gerald D Hines Interests
Design Kendall / Heaton Associates; Zimmer Gunsul Frasca Partnership
Structural Engineer
• (not specified) Magnusson Klemencic Associates
MEP Engineer
Design Hermanson
Project Manager Hines
Main Contractor PCL Construction Management Inc.
Other Consultant
• Energy Concept CEES-Advisors

Research Papers

Shoring Wall and Subsurface Structural Systems: IDX Tower, Seattle, Washington
May 2003 – CTBUH Journal, Spring 2003

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