Double Union is a hacker/maker space for women and nonbinary people in San Francisco.

We are a community workshop for working on projects in a comfortable, welcoming environment.

Double Union is a space for your projects

Things people do in this space include sewing, programming, electronics, screenprinting, fiber arts of all kinds, and zine making.

Fast internet, shared tools, a carefully curated library of books and zines, and discussion spaces make this a great space for working on your projects, learning skills, and meeting new friends.

Double Union is a supportive community for feminist activism. We strive to be intersectional feminists. We center nonbinary people and women who are trans, cis, intersex, queer, straight, and not-fitting-into-those-labels. Membership is open to all nonbinary people and all women, self-identified. For details about what we mean, see membership qualifications.

Visiting Double Union: Classes and Events

Double Union is located in the South of Market neighborhood in San Francisco.

Other than during events open to the public, Double Union visitors must be the invited guest of a member. Please do not visit without the express invitation of a member. Please do not invite guests unless you are a member. Guests may be any gender or age.

You can find out about upcoming events (and learn more about us) by following our:


Members join through an application and voting process. If you’re interested in being part of Double Union, please subscribe to our social media (listed above) to receive an announcement when we reopen membership applications.

Members pay dues on a sliding-scale basis between $0-100 per month, typically $25 or $50.

Check out our membership page to learn more.

Want to Support Double Union?

Double Union is a non-profit supported entirely by donations, membership dues, and volunteers.

We would love your support for maintaining our makerspace in San Francisco! We hope to serve as a role model and resource for other makerspaces and hackerspaces around the world.

You can make tax deductible one-time or monthly recurring donations via PayPal.

If you'd like to write a check (for example, if you want to donate from your donor-advised fund), you can make it out to Double Union and send it to our mailing address (which is different from our physical address):

Double Union
2443 Fillmore St #380-8811
San Francisco, CA 94115

You can also reuse or contribute to our open source website code and internal membership management app code.

Thank you to bugsnag logo for their OSS program :)