California law, in part, requires that the assessed value of all assessable property is to be determined annually as of a specified value date, January 1, also known as the “lien date”. If the market value of a property on January 1 is less than the assessed value of the property on January 1, the assessor may temporarily reduce the assessed value to market value. For accuracy, market value appraisals are based on real estate market data for time periods as close to the date of value (January 1) as possible.
COVID-19 impact on assessed values - Declines in market value due to the effects of COVID-19, if any, will be reflected in the 2022/23 tax bills issued by the Tax Collector.
The 2022/23 assessed values are available for review beginning July 1, 2022. Please review your assessed value closely and contact us with questions or concerns. The Assessor’s informal review filing period is July 1 – December 31. Formal appeals need to be filed with the Clerk of the Board of Supervisors before November 30th.
The temporary reduction discussed above is often referred to as a
Prop 8 (RTC 51). Proposition 8 passed in November 1978, amending Proposition 13 to recognize declines in market value for property tax purposes. Once a Prop 8 reduced value has been enrolled, that property’s value must be reviewed each year and its assessed value will go up or down in tandem with its market value as of the January 1 of each year.
My Property Value has Declined
The review period is closed.
- Taxpayers may request an informal review from the Assessor's Office between July 1 and December 31.* There is no cost for this service.
- During the filing period, you may file online for an informal review or print and mail the form to our office.
- Review forms are not sent out by mail.
- If this is a commercial property, submit a Commercial Addenda to expedite processing.
- An appraiser will review your property, make a determination, and our office will notify you of the results.
- If the Assessor's Office determines a reduction is appropriate, a roll change will be processed.
- If you disagree with the outcome of the review and the assessment appeal filing period is still open you may file an
Requests for a Prop 8 Review and/or an Assessment Appeal may only be filed during their respective filing periods.
For more background and information on decline-in-market-value (Prop 8) and informal Assessor reviews, please see the reference pages below:
Recently Purchased Property: Sales Price Lower than Assessed Value
*If December 31 falls on a Saturday or Sunday, mail postmarked on the next business day shall be deemed on time.