Contact Us

We love to hear from you!

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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!




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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…


FOR ALL ITEM AND MATERIAL  DONATIONS (including hair), kindly use our site

NO UNSOLICITED DELIVERIES to the address below,  Thank you!

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


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