Structure Type: built works - dwellings - houses - apartment houses

Designers: Naramore, Bain, Brady, and Johanson, (NBBJ) (firm); Wright Runstad and Company (firm); William James Bain Sr. (architect); Clifton J. Brady (architect); Perry Bertil Johanson (architect); Floyd Archibald Naramore (architect); Harold Jon Runstad (developer); Howard Sprague Wright (building contractor/real estate developer)

Dates: constructed 2018-2020

58 stories, total floor area: 1,527,817 sq. ft.

401 Union Street
Downtown, Seattle, WA 98101

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Building Notes

The 58-story Rainier Square tower contained 1,527,817 gross square feet, 1,076,025, net. It occupied a 271,314-square-foot (6.23-acre) site. (See King County Department of Assessments.gov, "Parcel Data for Parcel #713783-0000," accessed 10/23/2025.)

Authorities and Identifiers

King County Assessor Number: 7137830000 Department of Assessments eReal Property GIS Center parcel report GIS Center parcel viewer GIS Center iMap viewer

PCAD id: 22447

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Links

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