Commercial Union Assurance Building, Skyscraper in the Financial District, San Francisco, United States
The Commercial Union Assurance Building is a 16-story, 94 m (308 ft) office tower in San Francisco's Financial District, completed in 1921 in the Renaissance Revival style. The much taller 555 California Street stands to its west. Floors 9 and 10 now hold flexible coworking spaces.
George W. Kelham designed this structure in 1921 when insurance companies were expanding their presence in major cities. Its completion marked a period of economic growth for San Francisco's Financial District.
The building showcases Renaissance Revival features that were popular in early 20th century San Francisco. Its ornamental facade with classical details continues to define the character of this historic business district.
The building functions as an office structure in the Financial District with good access via multiple transportation options. Visitors should note that interior access may be limited since it remains a private office building.
The building's 94 m (308 ft) height equals that of San Francisco City Hall, though the two stand well apart in the skyline. Floors 9 and 10 have been converted into flexible coworking spaces, so part of the 1921 office tower now hosts shared desks rather than a single insurance firm.
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