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Real Property
Properties Affected Flood or Fires
Has your property suffered or been destroyed by the Kincade Fire, February Floods, or the 2017 Complex Fires? The Assessor's Office is here to help you during this difficult time.
It is important to know that you have 12 months from the event date to file the Calamity Damage Reassessment form, so you can wait until your insurance agency has inspected your property before filling out the form.
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.
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Sonoma County achieves record-high net assessment roll of more than $120 billion
Sonoma County Clerk-Recorder-Assessor Deva Marie Proto announced today that the county's net assessment roll has reached an unprecedented high of $120,459,402,383. This marks a 5.22 percent increase compared to last year’s assessment roll, reflecting the value of all real and business property as of Jan. 1. The 2024-25 assessment roll has been officially delivered to the Sonoma County Auditor-Controller-Treasurer-Tax Collector.
How to Find Out Who Owns a Property
Online Information
Look up basic property information online. Available 24/7, you can search by street address or by parcel number for information such as land value, improvement value, personal property value, exemption value, lot size, and net values. The owner's name is not available online.
Assessed Owner Information / Remote Services
Our office can confirm the current assessed owner of record for a property (maximum 3 requests per email/phone call)
Information Available at Our Office
If you know the street address, parcel number or owners name, you can use a public kiosk to access the Assessor's computerized property data system during normal business hours. Printing is available for a small fee.
Property Information for Sale
In addition to basic Assessment Roll information such as owner names, property addresses, and assessed property values, the County Assessor can provide a variety of data about Sonoma County properties to interested parties.
Parcel maps, various detailed reports, and other kinds of information are available for purchase.
Ways to Save on Property Taxes
Exemptions, Exclusion and Temporary Decline in Market Value Review may offer property tax savings for your property if certain conditions are met.
Some of the more common options include:
Exemptions
Exclusions
- Parent/Child Transfer Exclusion
- Grandparent to Grandchild Transfer Exclusion
- Base Year Transfer to Replacement Dwelling
- Disaster Relief
- Builder Exclusion
- More Exclusions
Temporary Property Value Decline
Property Transfers
When a there is a change in the manner that title is being held, the Assessor receives a copy of the recorded deed or other official document and determines if an appraisal is required under State Law.
An ownership transfer may trigger reappraisal of your property resulting in a change in your property taxes. If reappraisal is required, an appraisal is made to determine the new assessed value. You will be notified of the new assessment and the right to appeal.
Supplemental Assessments
The County Assessor must appraise property at its market value on the date of a change in ownership or when new construction is completed. The difference between the property's newly determined value after one of these events and the value which was previously enrolled on the Annual Assessment Roll results in a supplemental assessment. Contact our office for more information.
Home Reappraisal Events
Remodeling Your Home
Your entire home will not be reappraised if you add on another room. Only the market value of the new addition will be added to your assessed value. The new construction is assessed at the market value it adds to the property, not the cost of the contractor or materials.
Purchasing Property
Real property is valued at its current market value at the time it changes ownership. In a majority of cases, the sales price equals market value, but not always. The unpaid balance of any improvement bonds on the property may be included in the market value.
Adding Someone to Your Title
An Ownership transfer may trigger reappraisal of your property resulting in a change in your property taxes. For your protection we recommend that you contact an attorney as the law prohibits Sonoma County employees from answering questions of a legal nature; therefore we cannot advise you how to hold title or which type of document to record and we cannot assist you with the document.
Parcels
Assessor Maps
- The Assessor's maps are developed and maintained for property tax administration purposes only and do not establish “legal parcels”
Certificate of Compliance
- The Assessor does not split parcels with a Certificate of Compliance. A Planning Department Certificate of Compliance signifies that the Planning Department would recognize the affected parcels as being "legal" if they were to be split or sold, but this certificate doesn't pertain to changes in value or ownership.
Property Tax Information
The Assessor's Office does not create or mail out tax bills or collect tax payments. The Sonoma County Treasurer-Tax Collector creates and mails property tax bills and collects Secured Property Taxes, Supplemental Property Taxes and Unsecured Property Taxes.
Search property tax record information or pay your property taxes online by visiting the Sonoma County Treasurer-Tax Collector.
- You may also research Assessment and Tax information by calling the Tax Collector's office at (707) 565-2281.
- More about the Sonoma County Tax Collector
Certified Information Available to Homeowners
Information is available to give to your mortgage company so impound accounts will be based on a new purchase price.
Generally, the Sonoma County Tax Collector may be able to help you with this request. Contact the Tax Collector's Office for help with tax bills and assistance for impound information. Contact them at (707) 565-2281 or at taxcollector@sonoma-county.org