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Union Square

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Become a part of Seattle’s
best business address.

Leasing

Availabilities in Union Square

Home to some of the most prominent financial institutions, law offices, real estate professionals, health care, tech companies and other 
professional firms.

Image of One Union Square, floor 01

One Union Square

Floor 01, Suite 2

RSF — 1,885

Available

Image of One Union Square, floor 01

One Union Square

Floor 01, Suite 3

RSF — 2,066

Available

Image of One Union Square, floor 03

One Union Square

Floor 03, Suite 310

RSF — 4,911

Available 1/1/27

Image of One Union Square, floor 03

One Union Square

Floor 03, Suite 314

RSF — 2,118

Available Now

3d Tour
Image of One Union Square, floor 04

One Union Square

Floor 04, Suite 410

RSF — 6,201

Available Now, elevator lobby exposure

Image of One Union Square, floor 04

One Union Square

Floor 04, Suite 416

RSF — 1,746

Available Now

3d Tour
Image of One Union Square, floor 05

One Union Square

Floor 05, Suite 503

RSF — 3,039

Available NOW

Image of One Union Square, floor 06

One Union Square

Floor 06, Suite 600

RSF — 4,845

Available Now, elevator lobby exposure

3d Tour
Image of One Union Square, floor 06

One Union Square

Floor 06, Suite 620

RSF — 2,650

Available Now

3d Tour
Image of One Union Square, floor 07

One Union Square

Floor 07, Suite 710

RSF — 4,924

Available Now, elevator lobby exposure

3d Tour
Image of One Union Square, floor 08

One Union Square

Floor 08, Suite 804

RSF — 2,002

Available now, potential plug and play dental suite

Image of One Union Square, floor 08

One Union Square

Floor 08, Suite 830

RSF — 1,037

Available Now, Medical/Dental Space

3d Tour
Image of One Union Square, floor 09

One Union Square

Floor 09, Suite 900

RSF — 6,014

Available Now, elevator lobby exposure

3d Tour
Image of One Union Square, floor 11

One Union Square

Floor 11, Suite 1100

RSF — 18,832

Available Now, full floor

Image of One Union Square, floor 13

One Union Square

Floor 13, Suite 1312 + 1400

RSF — 28,367

Available Now

Image of One Union Square, floor 15

One Union Square

Floor 15, Suite 1500

RSF — 9,731

Available NOW, Elevator Lobby Exposure

3d Tour
Image of One Union Square, floor 15

One Union Square

Floor 15, Suite 1515

RSF — 2,721

Available Now

Image of One Union Square, floor 15

One Union Square

Floor 15, Suite 1528

RSF — 2,458

Available 1/1/27

Image of One Union Square, floor 17

One Union Square

Floor 17, Suite 1710

RSF — 3,534

Available now

Image of One Union Square, floor 17

One Union Square

Floor 17, Suite 1730

RSF — 3,077

Available Now, elevator lobby exposure

Image of One Union Square, floor 22

One Union Square

Floor 22, Suite 2200

RSF — 13,065

Available Now, elevator lobby exposure

3d Tour
Image of One Union Square, floor 23

One Union Square

Floor 23, Suite 2323

RSF — 6,222

Available Now

3d Tour
Image of One Union Square, floor 23

One Union Square

Floor 23, Suite 2328

RSF — 1,862

Available 2/1/27

Image of One Union Square, floor 28

One Union Square

Floor 28, Suite 2808

RSF — 3,255

Available Now

3d Tour
Image of One Union Square, floor 29

One Union Square

Floor 29, Suite 2900

RSF — 6,672

Available Now

Image of One Union Square, floor 29

One Union Square

Floor 29, Suite 2914

RSF — 1,943

Available Now

Image of One Union Square, floor 30

One Union Square

Floor 30, Suite 3018

RSF — 998

Available Now

3d Tour
Image of One Union Square, floor 32

One Union Square

Floor 32, Suite 3220

RSF — 7,000

Available Now, elevator lobby exposure

3d Tour
Image of One Union Square, floor 33

One Union Square

Floor 33, Suite 3300

RSF — 19,605

Available 1/1/27, full floor

Image of One Union Square, floor 33

One Union Square

Floor 33, Suite 3300-34

RSF — 39,201

Available Now, full floor

Image of One Union Square, floor 34

One Union Square

Floor 34, Suite 3400

RSF — 19,596

Available now, full floor

Image of Two Union Square, floor 01

Two Union Square

Floor 01, Suite 1322 6th Ave

RSF — 5,440

Available Now

3d TourVideo Tour
Image of Two Union Square, floor 03

Two Union Square

Floor 03, Suite 330

RSF — 2,682

Available Now

Image of Two Union Square, floor 04

Two Union Square

Floor 04, Suite 400

RSF — 5,499

Available Now

3d Tour
Image of Two Union Square, floor 04

Two Union Square

Floor 04, Suite 425

RSF — 2,636

Available Now, elevator lobby exposure

3d Tour
Image of Two Union Square, floor 05

Two Union Square

Floor 05, Suite 520

RSF — 5,080

Available Now, elevator lobby exposure

3d Tour
Image of Two Union Square, floor 13

Two Union Square

Floor 13, Suite 1325

RSF — 5,589

Available Now, Elevator Lobby Exposure

Image of Two Union Square, floor 15

Two Union Square

Floor 15, Suite 1515

RSF — 6,162

Available Now

3d Tour
Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1606

RSF — 2,709

Available Now

3d Tour
Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1616

RSF — 6,259

Available Now, Elevator Lobby Exposure

Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1622

RSF — 1,651

Available Now

3d Tour
Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1624

RSF — 2,182

Available now

Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1630

RSF — 7,182

Available Now, Elevator Lobby Exposure

Image of Two Union Square, floor 16

Two Union Square

Floor 16, Suite 1633

RSF — 3,349

Available Now

Image of Two Union Square, floor 24

Two Union Square

Floor 24, Suite 2424

RSF — 1,234

Available Now

Image of Two Union Square, floor 27

Two Union Square

Floor 27, Suite 2723

RSF — 1,028

Available Now

Image of Two Union Square, floor 39

Two Union Square

Floor 39, Suite 3909

RSF — 5,159

Available Now

Image of Two Union Square, floor 39

Two Union Square

Floor 39, Suite 3920

RSF — 6,483

Available Now

Image of Two Union Square, floor 41

Two Union Square

Floor 41, Suite 4120

RSF — 8,302

Available now

Image of Two Union Square, floor 43

Two Union Square

Floor 43, Suite 4316

RSF — 4,054

Available Now

Image of Two Union Square, floor 48

Two Union Square

Floor 48, Suite 4800

RSF — 22,566

Available Now, full floor

3d Tour
Image of Two Union Square, floor 48

Two Union Square

Floor 48, Suite 4800 + 4910

RSF — 39,488

Available Now

Image of Two Union Square, floor 49

Two Union Square

Floor 49, Suite 4910

RSF — 16,922

Available Now, elevator lobby exposure

Image of Two Union Square, floor 51

Two Union Square

Floor 51, Suite 5120

RSF — 3,831

Available Now

Image of Two Union Square, floor 53

Two Union Square

Floor 53, Suite 5305

RSF — 3,462

Available Now

Floor Suite RSF Availability Leasing PDF 3d Tour Video Tour
0121,885View
0132,066View
033104,9111/1/27View
033142,118NowViewView
044106,201Now, elevator lobby exposureView
044161,746NowViewView
055033,039NOWView
066004,845Now, elevator lobby exposureViewView
066202,650NowViewView
077104,924Now, elevator lobby exposureViewView
088042,002now, potential plug and play dental suiteView
088301,037Now, Medical/Dental SpaceViewView
099006,014Now, elevator lobby exposureViewView
11110018,832Now, full floorView
131312 + 140028,367NowView
1515009,731NOW, Elevator Lobby ExposureViewView
1515152,721NowView
1515282,4581/1/27View
1717103,534nowView
1717303,077Now, elevator lobby exposureView
22220013,065Now, elevator lobby exposureViewView
2323236,222NowViewView
2323281,8622/1/27View
2828083,255NowViewView
2929006,672NowView
2929141,943NowView
303018998NowViewView
3232207,000Now, elevator lobby exposureViewView
33330019,6051/1/27, full floorView
333300-3439,201Now, full floorView
34340019,596now, full floorView
Floor Suite RSF Availability Leasing PDF 3d Tour Video Tour
011322 6th Ave5,440NowViewViewView
033302,682NowView
044005,499NowViewView
044252,636Now, elevator lobby exposureViewView
055205,080Now, elevator lobby exposureViewView
1313255,589Now, Elevator Lobby ExposureView
1515156,162NowViewView
1616062,709NowViewView
1616166,259Now, Elevator Lobby ExposureView
1616221,651NowViewView
1616242,182nowView
1616307,182Now, Elevator Lobby ExposureView
1616333,349NowView
2424241,234NowView
2727231,028NowView
3939095,159NowView
3939206,483NowView
4141208,302nowView
4343164,054NowView
48480022,566Now, full floorViewView
484800 + 491039,488NowView
49491016,922Now, elevator lobby exposureView
5151203,831NowView
5353053,462NowView

Two Union Square

image/svg+xml

One Union Square

Floorplan of One Union Square, floor 01, Suite 2
Floorplan of One Union Square, floor 01, Suite 3
Floorplan of One Union Square, floor 03, Suite 310
Floorplan of One Union Square, floor 03, Suite 314
Floorplan of One Union Square, floor 04, Suite 410
Floorplan of One Union Square, floor 04, Suite 416
Floorplan of One Union Square, floor 05, Suite 503
Floorplan of One Union Square, floor 06, Suite 600
Floorplan of One Union Square, floor 06, Suite 620
Floorplan of One Union Square, floor 07, Suite 710
Floorplan of One Union Square, floor 08, Suite 804
Floorplan of One Union Square, floor 08, Suite 830
Floorplan of One Union Square, floor 09, Suite 900
Floorplan of One Union Square, floor 11, Suite 1100
Floorplan of One Union Square, floor 13, Suite 1312 + 1400
Floorplan of One Union Square, floor 15, Suite 1500
Floorplan of One Union Square, floor 15, Suite 1515
Floorplan of One Union Square, floor 15, Suite 1528
Floorplan of One Union Square, floor 17, Suite 1710
Floorplan of One Union Square, floor 17, Suite 1730
Floorplan of One Union Square, floor 22, Suite 2200
Floorplan of One Union Square, floor 23, Suite 2323
Floorplan of One Union Square, floor 23, Suite 2328
Floorplan of One Union Square, floor 28, Suite 2808
Floorplan of One Union Square, floor 29, Suite 2900
Floorplan of One Union Square, floor 29, Suite 2914
Floorplan of One Union Square, floor 30, Suite 3018
Floorplan of One Union Square, floor 32, Suite 3220
Floorplan of One Union Square, floor 33, Suite 3300
Floorplan of One Union Square, floor 33, Suite 3300-34
Floorplan of One Union Square, floor 34, Suite 3400
Floorplan of Two Union Square, floor 01, Suite 1322 6th Ave
Floorplan of Two Union Square, floor 03, Suite 330
Floorplan of Two Union Square, floor 04, Suite 400
Floorplan of Two Union Square, floor 04, Suite 425
Floorplan of Two Union Square, floor 05, Suite 520
Floorplan of Two Union Square, floor 13, Suite 1325
Floorplan of Two Union Square, floor 15, Suite 1515
Floorplan of Two Union Square, floor 16, Suite 1606
Floorplan of Two Union Square, floor 16, Suite 1616
Floorplan of Two Union Square, floor 16, Suite 1622
Floorplan of Two Union Square, floor 16, Suite 1624
Floorplan of Two Union Square, floor 16, Suite 1630
Floorplan of Two Union Square, floor 16, Suite 1633
Floorplan of Two Union Square, floor 24, Suite 2424
Floorplan of Two Union Square, floor 27, Suite 2723
Floorplan of Two Union Square, floor 39, Suite 3909
Floorplan of Two Union Square, floor 39, Suite 3920
Floorplan of Two Union Square, floor 41, Suite 4120
Floorplan of Two Union Square, floor 43, Suite 4316
Floorplan of Two Union Square, floor 48, Suite 4800
Floorplan of Two Union Square, floor 48, Suite 4800 + 4910
Floorplan of Two Union Square, floor 49, Suite 4910
Floorplan of Two Union Square, floor 51, Suite 5120
Floorplan of Two Union Square, floor 53, Suite 5305

Leasing Contact

Mick Newell

Vice President of Leasing

206-613-5318
mnewell@waholdings.com

Tim Holt

Executive Vice President

206-613-5330
tholt@waholdings.com

Retail Leasing

West Coast Commercial Realty

206-283-5212
Floorplan PDF Further Inquiry Create Brochure Schedule a Visit Video Tour
  • Elegant Design
    • The Portal
    • The Great Wall
    • Waveform Ceiling
    • Urban Garden
    • Awards
  • Campus Amenities
    • Retail Ecosystem
    • Outdoor Spaces
    • Conference Facilities
    • Fitness Center
    • Live Performances
    • Private Dining
    • Tenant Events
  • In the Neighborhood
    • Washington Athletic Club
    • Hotels
    • Restaurants
    • Theatre District
    • Newsletter
  • Leasing & Contact
    • Availabilities
    • Create Mailer
    • Contact
Union Square

© 2026 Washington Holdings

Washington Holdings