A homeowners' exemption may also apply to a supplemental assessment. For more information, call (925) 313-7481.For more information, call (925) 313-7481. 7. What sorts of properties can qualify for the Homeowners' Exemption? Download PDF BOE-266 REV. The Homestead Exemption application can be filled out at the county auditor's office in which the property is located. Click here to apply for an initial CCW permit, renew a CCW permit, modify an existing permit, or to obtain a duplicate of an existing permit. Total of 111 forms are available for Contra Costa County for 2024. We have various applications and forms available on our web site for your convenience. A special tax statement is required to determine if any value exists.