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Real Property

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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, net value and supplemental notices. The owner's name is not available online.  

Search Parcel Information now

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. 

Interactive Voice Response System (IVR)

Call our handy Interactive Voice Response system 24/7 for basic property information. Enter the assessment number for land value, improvement value, personal property value, exemption value and net value.

Select the fax-back option to receive additional information via fax. 

Interactive Voice Response System (707) 565-3010

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.

More about Public Data for Sale to the Public

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. 

Read more about  Property Transfers

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.

More about How Property Values are Assessed

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.

More about How Property Values are Assessed

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.

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 or by using their interactive voice response and fax-back system at (707) 565-3010.

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

More about the Sonoma County Tax Collector

Clerk-Recorder-Assessor

William F. Rousseau

County Clerk-Recorder-Assessor-Registrar of Voters

Business Hours
Monday – Tuesday
8:00 AM – 5:00 PM
Wednesday
8:00 AM – 4:00 PM
Thursday – Friday
8:00 AM – 5:00 PM

Note: Document processing and fee transactions end 30 minutes prior to closing

Address

Assessor's Office

585 Fiscal Drive
Room 104F
Santa Rosa, CA 95403
38.4659106, -122.7251807

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Active scams for services that are offered at our office for low or no cost!

Property Value

Search Parcel Information

Sonoma County Property Value

Search current maps, parcel information, property values, change notices and more

Change of Address and Authorization Forms

Download Forms

Important Notice

Important AnnouncementThe staff of the Clerk-Recorder-Assessor's Office are forbidden by California legal codes to practice law or provide legal advice; this prohibition includes giving advice about what forms you might need or how you should fill them out.