contact us

We love to hear from you!

drop us a line


Do you have any questions, suggestions, or feedback?

There are many ways to reach our staff and volunteers. 

Thank you for helping Matter of Trust evolve, year after year!




5 + 6 =

General inquiries

Press contact

How can I help?

Oh, so many ways to participate. Donate money, hair or stuff. Plan a zero waste flash mob. Start a green jobs hub. Join our global eco-solutions platform, and much more…


PLEASE NOTE:  Unexpected large boxes don’t fit through the mail slot, so they can get returned and no one wants that!

FOR ALL IN-KIND DONATIONS (including hair), kindly use our Free Exchange program.  NO UNSOLICITED DELIVERIES, Thank you!


Matter of Trust
Office Headquarters

99 Saint Germain Avenue
San Francisco, CA 94114 USA
General: +1-415-242-6041
Funding: +1-415-235-2403

Official Mailing Address for LETTERS ONLY no donation boxes, please.


Eco-Industrial Hub and Model Factory

1566 Howard Street
San Francisco, CA 94103 USA
Phone: +1-415-242-6041


Limited warehouse space
No unsolicited deliveries,
Thank you!



Model Eco-Apartment and Urban Edible Garden

728 Cole Street
San Francisco, CA 94117 USA
Phone: +1-415-242-6041