One and Two Union Square are the most prestigious and inviting places to do business in Seattle. Award-winning, icon of sustainability, LEED Platinum certified, northwest-inspired design, dramatic views, splendid courtyards, superior office finishes, state-of-the-art systems and a management team dedicated to exceeding tenant expectations, all combine to make Union Square Seattle’s premier business address.
- 36 floors above ground
- 672,479 sq ft
- Completed in 1981
- Outdoor courtyard connecting One and Two Union Square
- 56 floors above ground
- 1,165,441 sq ft
- Completed in 1989
- The building, at a height of 740 ft (230 m), is among Seattle’s tallest skyscrapers.
- Tip of the flag pole is 796’6” above the street and the 90-foot flag pole is 56’6” above the roof.
- The 20 x 30 foot US flag flies at about 300 feet higher than the top of the Space Needle.
- First in the world to use 19,000 lbs/2” concrete.
Home to some of the most prominent financial institutions, law offices, real estate professionals, health care, tech companies and other professional firms.
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Two Union Square
One Union Square
Discover the New Two UnionVisit NewTwoUnion.com
Awards, Certifications, and Notable Reviews
LEED Certified 2009, LEED Platinum Certified 2015
Certification of One and Two Union Square
Energy Star: One Union = 93, Two Union = 97
One and Two Union Square
BOMA Building of the Year 1999/2000
Two Union Square
NWCP Outstanding Projects 2019
Suspended Ceiling Award for the New Two Union Lobby
Puget Sound Blood Center 2011
Union Square Community Service Award
Featured in Architecture and Urbanism 1991
Two Union Square
We are committed to maintaining buildings at the forefront of environmental design and operation. Both One and Two Union Square received LEED Platinum certification in 2015.
The two buildings total roughly 1,837,920 SF with approximately 19,000 to 22,500 SF
floor plates per floor. The two buildings are connected by a fireplace lobby and
indoor pedestrian concourse to the neighborhood.
Union Square offers three conference rooms. In addition to our Union Square Boardroom, and our 3rd Floor Conference Room, we have a three-room conference center on the 51st Floor of Two Union Square, boasting spectacular views and contemporary amenities.
The 1,021-stall parking garage, including Tesla Supercharger and EV charging stations, offers tenants and visitors an unmatched convenience. Weekdays offer complimentary Valet parking and low evening and weekend rates of $7 are now available. Evenings start at 5pm-close, and weekends are Sat-Sun.Check Parking Rates
Union Square offers amenities that inspire and help build business and community. Tenants and guests are greeted with stunning and spacious lobbies, on-site dining, retail, and quality services. Respite and relaxation can be found in thoughtfully designed outdoor courtyards and ample green spaces. Other modern amenities such as a full fitness center, Tesla Supercharger and EV charging stations, bike storage and shower rooms further complement the reknowned Union Square experience.
No need to leave the buildings to eat, shop, bank, grab a coffee or pick up your dry cleaning. These fine shops, cafés and restaurants are just downstairs:
Blue Water Taco Grill206-588-4755 www.bluewatertacogrill.com
Cortina Café206-946-9336 www.cortinaseattle.com/cafe
Dimples Gifts & Sundries One Union Square206-622-1866 One Union Square
Floral Masters206-838-7290 www.floralmasters.net
Fresh Table Cafe206-838-7280 www.freshtablecafe.com
HomeStreet Bank206-621-0100 www.homestreetbank.com
MOD Super Fast Pizza206-332-0200 www.modpizza.com
Union Square Cleaners206-652-9965
Walla Walla Farms Cafe206-381-5730 www.wallawallafarms.com
World Fresh Asian Eatery206-622-7752
The surrounding neighborhood is home to some of the best restaurants, hotels, retail and entertainment Seattle has to offer. 5th Avenue Theatre, ACT Theatre, Convention Center and Freeway Park, Pike Place Market, Seattle Art Museum, the Seattle Aquarium, ferry terminal and Olympic Sculpture Park are just a short walk away.
If you are looking to escape the hustle and bustle of the city, the Arne Gillam Courtyard is the place to do so. Enjoy a sunny lunch break in the summer or a holiday stroll through the illuminated trees in the winter. Union Square offers this relaxing one acre of open space in the heart of the city.