What is the price for renting office space at Two Union Square?

The average rate for office space here is $30.75/SF/YR, with rates starting at $27.50/SF/YR.

What type of office space is available to lease at Two Union Square?

The property includes 8 Office spaces located on 8 floors. Availabilities total 128,745 square feet of office space. The property offers Multi-Tenant commercial space. Of the availability currently listed in the building, available spaces include 8 sublease options.

Does Two Union Square have enough space for a large business?

Yes, availabilities here could accommodate larger businesses with 6 office spaces larger than 10,000 square feet available for lease. The largest office size is 20,850 SF, located on floor 7. For a better understanding of how this space could work for you, reach out to schedule a tour.

Does Two Union Square have parking?

Yes, the property offers 720 parking spaces with a parking ratio of 0.64 / 1,000 SF.

601 Union Street, Seattle, WA 98101

For Lease $27.50 - $34.00/SF/YR
Property Type Office - General Office
Property Size 1,126,428 SF
Lot Size 2.06 Acre
Parking Spaces Avail. 720
Parking Ratio 0.64 / 1,000 SF
Property Tenancy Multi-Tenant
LEED Certified Platinum
Building Class A+
Year Built 1989
Date Updated Aug 5, 2026

Description

Two Union Square is a prominent A+ office building totaling 1,126,428 square feet, situated on a 2.06-acre lot in the heart of Seattle. Constructed in 1989, the property is LEED Certified Platinum and features 720 parking spaces with a 0.64 parking ratio. With its modern design and sustainable credentials, the building offers a professional environment suitable for a wide range of businesses.

Set in Seattle's vibrant Central Business District, Two Union Square enjoys proximity to abundant amenities and transportation options. Dining is particularly convenient, with Cortina, World Fresh Asian Eatery, and MOD Pizza all within 0.1 miles. Nearby hotels include the Sheraton Seattle, Hilton Motif Seattle, and Fairmont Olympic Hotel, each under 0.2 miles away. For commuting ease, the Westlake Hub is about 0.3 miles away, and Pioneer Square Station is roughly 0.5 miles from the building. Educational institutions such as the University of Washington - Professional & Continuing Education and Seattle Central College are also close by, adding to the area's dynamic appeal.

8 Spaces Available

601 Union Street 17th Floor

Space Type

General Office

Lease Rate

$28.00/SF/YR

Total Space

6,663 SF

Floor

Divisible Space

6,663 - 6,663 SF

Available Date

Immediate

Renewal Option

Sublease

Yes

Sublease Expiry

Nov 30, 2027

Turnkey

- large corporate lunch room & large training room with operable wall to create large open space
- 1 mother rooms, 1 quiet room
- Sublease term through November 2027 | Furniture/FF&E is available

601 Union Street 18th Floor

Space Type

General Office

Lease Rate

$28.00/SF/YR

Total Space

8,532 SF

Floor

Divisible Space

8,532 - 8,532 SF

Available Date

30 Days

Renewal Option

Sublease

Yes

Sublease Expiry

Nov 30, 2027

Turnkey

Open office space | internal connecting staircase to floor 19
Large storage rooms | server room | coffee/work rooms
2 private offices | 1 large and 3 small meeting rooms 20 desks
Sublease term through November 2027 Furniture/FF&E is available

601 Union Street 19th Floor

Space Type

General Office

Lease Rate

$28.00/SF/YR

Total Space

20,553 SF

Floor

Divisible Space

10,000 - 20,553 SF

Available Date

Immediate

Renewal Option

Sublease

Yes

Sublease Expiry

Nov 30, 2027

Turnkey

- - Open office space | mail room internal connecting staircase to floors 20 & 18
  - 2 meeting rooms | 2 breakout spaces | 6 private offices | 121 desks | 12 touch-down desks
  - Large storage rooms | 1 quiet room | server room | coffee/ work rooms
  - Sublease term through November 2027 Furniture/FF&E is available

601 Union Street 20th Floor

Space Type

General Office

Lease Rate

$28.00/SF/YR

Total Space

20,553 SF

Floor

Divisible Space

10,000 - 20,553 SF

Available Date

Immediate

Renewal Option

Sublease

Yes

Sublease Expiry

Nov 30, 2027

Turnkey

- - - Main reception area, internal connecting staircase to floors 19 & 21
    - 8 private offices | open office space | 131 desks 2 break-out spaces
    - 3 meeting rooms | server room coffee/work rooms
    - Sublease term through November 2027 Furniture/FF&E is available

601 Union Street 21st Floor

Space Type

General Office

Lease Rate

$28.00/SF/YR

Total Space

20,553 SF

Floor

Divisible Space

10,000 - 20,553 SF

Available Date

Immediate

Renewal Option

Sublease

Yes

Sublease Expiry

Nov 30, 2027

Turnkey

- - - - Executive reception area, kitchen, boardroom, private restroom
      - 22 private offices internal staircase connecting to floor 20
      - Four conference rooms, open office space, server room and coffee / work rooms