The Art Deco and PWA Moderne style building opened in 1934 and was added to the National Register of Historic Places (as U.S. Post Office-Long Beach Main) due to its architectural significance in 1985.

The structure's most prominent feature is the central tower rising four-and-a-half stories from the street level.

[1] From 1933 to 1939, Simon was the head of the Office of the Supervising Architect, an agency of the United States Treasury Department that designed federal government buildings.

Construction was halted briefly, but work resumed a week later after a survey by contractors showed little damage.

[8] The scaffolding was removed from the structure at the end of July 1934,[9] and 5,000 persons attended the opening ceremony in September 1934.