Standard Plaza

Standard Plaza is a 16-story office building in downtown Portland in the U.S. state of Oregon. At 222 feet in height, it was the largest office building in Oregon when it was completed in 1963. The 217,000-square-foot structure, occupying a city block on SW 6th Avenue between Main Street and Madison Street, is owned by Standard Insurance Company, which also owns the neighboring Standard Insurance Center. It was designed by Skidmore, Owings and Merrill in the international style.

Construction firm Andersen–Westfall was awarded the contract to build Standard Insurance's new headquarters in March 1961. The bid was for $6.4 million on the project that was expected to cost $8.3 million total. Construction began in 1961, and by January 1962 the superstructure had risen to four stories above ground-level. At that time it was expected that construction would be complete by March 1963.

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