One and Two Union Square
One and Two Union Square are among the most prestigious and inviting places to do business in Seattle. Award-winning 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.
Located in the heart of Seattle at Sixth Avenue between Union and University Streets, Union Square is a vibrant and lively destination that offers a variety of retail, intimate outdoor spaces, casual and fine dining.
Union Square provides convenient access to I-5, I-90 (Bellevue) and 520 (Bellevue). Off-ramps are located at Seneca and Union, On-ramps at Spring and University.
The two buildings total roughly 1,806,000 SF with approximately 18,400 to 21,700 SF floor plates per floor. The two buildings are connected by a fireplace lobby and underground pedestrian concourse to the neighborhood.
The 1,100-stall parking garage 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. Find out more at www.DowntownSeattleParking.com.
The surrounding neighborhood is home to some of the best restaurants, hotels, retail and entertainment Seattle has to offer. 5th Avenue 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.
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.
One Union Facts
- 36 floors above ground
- 657,531 Sq ft
- Completed in 1981
- Outdoor courtyard connecting One and Two Union Square
Two Union Facts
- 56 floors above ground
- 1,132,554 sq ft
- Completed in 1989
- The building, at a height of 740 ft (230 m), is the third tallest skyscraper in the Seattle skyline.
- The 20 x 30 foot US flag flies at about 300 feet higher than the top of the Space Needle.
- Tip of the flag pole is 796’6” above the street and the 90-foot flag pole is 56’6” above the roof.
- First in the world to use 19,000 lbs/in.2 concrete.
Energy Star TUS = 97, OUS = 97 – One and Two Union Square
LEED Certified 2009 – Certification of One and Two Union Square
LEED Platinum Certified 2015 – Certification of One and Two Union Square
BOMA Building of the Year 1999/2000 – Two Union Square
Puget Sound Blood Center 2011 – Community Service Award
Two Union featured in Architecture and Urbanism February 1991
Union Square stands as the Premier Seattle Office location, and is home to some of the most prominent financial institutions, law offices, real estate professionals, health care, and other professional firms. Union Square has many amenities right outside your door with no need to leave the building.
One Union Square
RSF – 3,745
|3||7,542||Available Now||View >|
|8||1,017||Medical/Dental Space||View >|
|19||6,289||Available Now||View >|
|22||12,812||Available Now||View >|
|25||6,641 / 2,952 / 6,587||Available Now||View >|
|30||1,194 / 1,410||Available Now||View >|
|16||7,799||Available Now||View >|
|37||2,447||Available Now||View >|
Executive Vice President
Senior Vice President
Union Square Retail & Restaurants
No need to leave the buildings to eat, shop, bank, grab a coffee or pick up your dry cleaning. These fine shops and restaurants are just downstairs:
- Blue Water Taco Grill
- Butch Blum
- Dimples Gifts & Sundries One Union Square
- Floral Masters
- Fresh Basil
- Fresh Table Cafe
- HomeStreet Bank
- Lucky Shine's Shoe Shine
- MOD Super Fast Pizza
- Walla Walla Farms Cafe & Catering
Walla Walla Farms Cafe & Catering
In the Neighborhood
Down the Street
Union Square is located in the heart of downtown, walking distance to some of the best restaurants, hotels, retail and entertainment Seattle has to offer.
Legend (click to view)
Show All / Show None
- Paramount Hotel
- Red Lion
- Hotel Vintage Park
- W Hotel
- Crowne Plaza Hotel
- Grand Hyatt
- Hotel 1000
- Act Theatre
- Benaroya Hall
- Paramount Theatre
- The 5th Avenue Theatre
- Lowe’s Meridian 16
- Safeco Field
- Century Link Field
- Ruth’s Chris
- Cheesecake Factory
- Gordon Biersch
- Il Fornaio
- Loulay Kitchen and Bar
- Blueacre Seafood
- Wild Ginger
Museums & Galleries
- Pacific Place
- Butch Blum
- Banana Republic
- The Gap
- Old Navy
- Abercrombie & Fitch
- Urban Outfitters
Arne Gillam Courtyard
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.
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.
Union Square gets LEED certification
SEATTLE — One Union Square and Two Union Square have been awarded LEED certification. Union Square has been working for more than two years to achieve the designation.
Arne Gillam of Washington Holdings, Union Square's landlord, said LEED certification is an important achievement in the current market. “Green buildings are the only viable option for many companies when choosing a new location.” The building owners have focused on energy use, recycling and low impact maintenance. New systems at One Union Square have reduced annual energy consumption by an average of 7.5 million kilowatt hours, a 40 percent reduction.
For things to do in and around Union Square and Seattle check out current and past issues of our quarterly newsletter (click on a thumbnail to view the PDF for that newsletter).
| Senior Vice President/General Manager
| Director of Facilites
| Assistant Vice-President/Senior Property Manager
| Property Manager
| Director of Construction
| Senior Property Accountant
About Washington Holdings
Washington Holdings is a real estate investment firm based in Seattle. We purchase and develop commercial properties and acquire and originate debt investments secured by income properties. We primarily focus on properties in the major metropolitan areas in the Western United States. Our deep experience in the property and capital markets allows us to analyze investment opportunities efficiently and to act decisively when we believe an investment will generate attractive risk-adjusted returns.