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!




    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