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 1 Retail space, as well as 37 Office spaces on 26 floors. Availabilities total 288,303 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.

Is Two Union Square suitable for a small business?

Yes, availabilities here may be suitable for small businesses with 15 office spaces under 5,000 square feet available. Space sizes here start at 1,028 square feet.

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

Yes, availabilities here could accommodate larger businesses with 8 office spaces larger than 10,000 square feet available for lease. The largest office size is 22,566 SF, located on floor 48. 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 Jun 18, 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.

38 Spaces Available

1332 6th Avenue #4

Space Type

Retail

Lease Rate

Contact for pricing

Total Space

5,440 SF

Floor

Divisible Space

5,440 - 5,440 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

601 Union Street #1325

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

5,589 SF

Floor

Divisible Space

5,589 - 5,589 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

elevator lobby exposure

601 Union Street #1515

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

6,162 SF

Floor

Divisible Space

6,162 - 6,162 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

601 Union Street #1606

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

2,709 SF

Floor

Divisible Space

2,709 - 2,709 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

601 Union Street #1616

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

6,259 SF

Floor

Divisible Space

6,259 - 6,259 SF

Available Date

Dec 1, 2026

Renewal Option

Yes

Sublease

Available 12/1/26, elevator lobby exposure

Contacts

Tim Holt

Washington Holdings

Mark Barbieri

Washington Holdings

Thomas M. Newell

Washington Holdings

Location

Located at 601 Union Street, Seattle, WA 98101, this property is part of the Seattle Central Business District neighborhood and Seattle market.

Map
Street

98/100 Walker's Paradise
100/100 Rider's Paradise
76/100 Very Bikeable

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Two Union Square