Two Union Square

4th tallest finished building in Seattle

Two Union Square is an office building in Seattle, with 56 floors, finished in 1989. It stands 230 m (740 ft) tall, which makes it the 4th tallest finished building in Seattle.

Height

230 m · 740 ft

Rank in Seattle

4th of 25 listed

Floors

56

Completed

1989

Use

Office

City

Seattle, USA

Next to it in the ranking

• 2nd · Rainier Square Tower258 m · 847 ft · 2020
• 3rd · 1201 Third Avenue235 m · 772 ft · 1988
• 5th · Seattle Municipal Tower220 m · 722 ft · 1990
• 6th · F5 Tower197 m · 646 ft · 2017

See all of Seattle's tallest buildings

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Heights, floors and years for finished buildings follow published figures, cross-checked with Wikipedia's list of tallest buildings in Seattle. Last checked 2 Nov 2026.