The Main Seattle Post Office has a significant history.
The former post office on Third Avenue and Union Street was a "grand Beaux Arts" building with Neoclassical features built from 1903 - 1908 and housed federal offices in addition to the post office. The sandstone used for its construction was porous and over several decades pollutants caused it to deteriorate.[1] James Knox Taylor was the building's supervising architect. The building was replaced by a modern structure in 1959.
The current Midtown Post Office is located on the east side of 3rd Avenue between University and Union streets.[2] It is a three-story building which measures approximately 96’ x 211’ and includes underground/basement level parking. It is constructed in the Modernist International style and is considered a heritage building by the City of Seattle.[1] It was designed by Naramore, Bain, Brady, and Johanson.
The first Seattle post office was built on what is now Post Avenue or Post Alley in 1880.