Worthington, Skilling, Helle, & Jackson

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Magnusson Klemencic Associates is a member of the CTBUH at the Donor level.

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Renamed to Magnusson Klemencic Associates (2003)
Renamed to Skilling Ward Magnusson Barkshire (1987)
Renamed to Skilling Ward Rogers Barkshire (1983)
Renamed to Skilling, Helle, Christiansen, Robertson (1967)

Worthington, Skilling, Helle, & Jackson

Formerly named Worthington & Skilling (1960)
Formerly named W.H. Witt Company (1955)

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Note: All listed data for proposed or under construction buildings is based on the most reliable information currently available. This data is thus subject to change until the building has completed and all information can be confirmed and ratified by the CTBUH.

  Completed   Architecturally Topped Out   Structurally Topped Out   Under Construction   On Hold   Never Completed   Proposed   Vision   Demolished
ID #   Status Building Name City Height (m) Height (ft) Floors Completion Material Use
19708 1   COM IBM Building Seattle (US) 84.1 276 20 1964 office / commercial