The Assessor is working with other county departments to identify all properties with over $10,000 in structural damage. The information we obtain from other agencies will aid us in applying property tax reductions on a mass appraisal basis.
Important: property ownersmustcomplete a Calamity Damage Reassessment application and submit it to the County Assessor in order to receive property tax relief. You have 12 months to file this claim from the date of the event in order to be eligible.
The County Assessor will process Calamity Damage Reassessments, but it will not affect taxable values for the 2018-19 Annual tax bill, or the 2019-20 taxable value since the flood occurred after January 1st. Please be patient with the process.
Once we have determined your new lower assessed value, you will receive a Supplemental Notice that will adjust prior tax values for the 2018-19 and the 2019-20 tax rolls to recognize the reduction in value from your flood damage. If you do not receive this notice by November 30, 2019 then please contact the Sonoma County Assessor’s Office.
Yes. If your business personal property or vessel suffered damage of $10,000 or more, you are eligible for property tax relief.
Important: Please complete a Calamity Damage Reassessment application for the Assessor’s office to review.
Values for businesses and vessels are determined at Fair Market Value on January 1stannually. Please report asset values as of January 1, 2019 prior to the flood, and then submit a claim form recognizing the damage so that the Assessor can adjust the taxable value for the appropriate time period.
No. Property owners will retain their previous Factored Base Year Value if the house is rebuilt in a like or similar manner, regardless of the actual cost of construction. However, any new square footage or extras, such as additional bedrooms or bathrooms, will be added at its full market value to your Proposition 13 Factored Base Year Value.
Important: If you will be living somewhere else for an extended period of time, please fill out a Change of Mailing Address Form right away so that we can contact you if needed.
The Assessor maintains building sketches for most properties. If you are the property owner, or an authorized agent, who has completed our Authorization to Access Confidential Files form, you may be able to get a copy of that document.
Important: Please complete a Calamity Damage Reassessment application for the Assessor’s office to review. 
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