A homeowners' exemption may also apply to a supplemental assessment. For more information, call (925) 313-7481.STATEMENTS. This claim may be used to file for the Homeowners' Exemption for the Assessment Roll and the Supplemental Assessment Roll. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. Homeowners may not be aware of an exemption that lowers annual property taxes or the exemption that protects homeowners from a particular kind of creditor. Complete a homestead declaration form. Total of 103 forms are available for Contra Costa County for 2024. Download PDF BOE-266 REV. Us and describe the property to be levied on. Sacramento County does not allow base year transfers from other counties.