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Expansive Pioneer Building
Expansive Pioneer Building
Expansive Pioneer Building
Expansive Pioneer Building
Expansive Pioneer Building

Expansive Pioneer Building

600 1st Avenue, Seattle, WA 98104

4.6 156 reviews
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Built in 1892, the Pioneer Building housed mining companies during the Klondike Gold Rush and Seattle’s first speakeasy during Prohibition. The Richardsonian Romanesque-style building earned National Historic Landmark status in 1978 and borders Pioneer Square Park. A flagship property for Expansive on the West Coast, it offers six floors of stunning workspace with hardwood floors, cast iron columns, and a large center atrium lit by skylights running the length of the building.

Complimentary coffee & tea
High-speed internet
Kitchen
Privacy booths
Vending machine

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Expansive Pioneer Building

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Available Workspaces

Day Pass

from $33/day
Book Now

Meeting Room

from $40/hour
4 to 20
View Rooms

Private Office

from $527/month
2 to 9 desks

Private Day Office

from $89/day
View Offices

Dedicated Desk

from $366/month

Business hours

Monday

from 9:00 am to 5:00 pm

Tuesday

from 9:00 am to 5:00 pm

Wednesday

from 9:00 am to 5:00 pm

Thursday

from 9:00 am to 5:00 pm

Friday

from 9:00 am to 5:00 pm

Saturday

Closed

Sunday

Closed

600 1st Avenue, Seattle, WA 98104

  • Map
  • Street
Points of interest powered by OpenStreetMap

Walk & ride

  • Walk score

    97/100

    Walker's Paradise
  • Transit score

    100/100

    Rider's Paradise
  • Bike score

    89/100

    Very Bikeable

Powered by Walk Score ®

Reviews

4.6
View all 156 reviews on Google
5

Nicholas Hamilton

Oct 31 2025

Having a home base to return to after a long week of being in the field is invaluable. Expansive at Pioneer Square has an excellent mix of support, solitude, collaboration, and quiet to work in. No matter the time of day or time of week I swing through, there are smiling faces, social events, and a welcoming environment for me to focus and enjoy my work. Thank you for providing a fantastic place to thrive!

5

Michael Doyle

Oct 12 2025

Expansive Pioneer Building was an amazing part of Seattle Space Week. We held three events there, bringing together amazing speakers and an audience from across the space innovation ecosystem in Seattle. The space itself worked beautifully, giving participants a great environ ment to connect and share inspiration. Vickii was our point person and I couldn’t praise her more. She was informative, helpful, flexible and on-hand for whatever we needed. Looking forward to continued partnership!

5

Victoria Wagner

Oct 08 2025

We had a panel event at the Pioneer building and it was FABULOUS! Vicki totally took care of us and even provided excellent local catering options. Highly recommend!

5

Kevin Burtchaell

Oct 08 2025

Great panel of speakers this evening's Space Week event: Don't Launch Blind Nikki, Travis, Marcey and Draden provided a well rounded and broad discussion and answered all our questions about entering and staying in the Space Industry Well done Kevin

5

Jonathan Amundsen

Oct 07 2025

Oh, cool space, nice vibe. Looks like it is good as a co-working space and a nice event space too. Space Northwest had a nice panel event for space week here.

Frequently Asked Questions

  • Want to get a feel for the workspace before signing up? Schedule a tour to experience Expansive Pioneer Building and envision your workday in this dynamic environment. All you need to do is fill out this form, indicating your preferred date and time, and we'll be happy to host you.

  • Expansive Pioneer Building operates during regular business hours, as indicated above. For access outside of these hours, please contact the operator directly to inquire about any available options.

  • Coworking spaces typically have limited storage options, most of which are reserved for members with dedicated desks or private offices. With that said, it’s best to contact the coworking operator directly via the form on the right side of the page to learn about available storage options.

  • Whether you're a day pass holder or a monthly member, you can access most amenities. Meeting rooms do require prior scheduling, and private offices are reserved for those with subscriptions. However, the lounge, kitchen, and breakout spaces are open to all. Complimentary services are also available regardless of membership tier, while ancillary services can be purchased separately or negotiated with Expansive.

  • For spontaneous collaboration and interaction, open desks provide an open and flexible environment. If you prefer a dedicated space with shared community elements, dedicated desks offer a great balance between personal space and interaction.

    On the other hand, private offices are best suited for focused work and private interactions. They're ideal for solo workers as well as teams seeking a dedicated space, shielded from distractions.

    Choosing the ideal coworking arrangement for you is about aligning your workspace with your work style, team dynamics, and project requirements.

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