Copies of Secured and Supplemental property tax bills can be found on line by going to Account Lookup
Copies of Unsecured and Redemption tax bills can be obtained by writing to the following address:
Contra Costa County Treasurer
Attn: Duplicate Bills
P.O. Box 631
Martinez , CA 94553-0063
Taxpayers may also call our office, (925) 957-5280 and/or email
us to request a duplicate tax bill for the currenty year.
Be sure that your payment and/or duplicate bill fee check clearly states your name, APN/Account number, mailing address, phone number, and email address if available so that we may contact you with any questions regarding your request.