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Search Property Information

Property Values

The Sonoma County Assessor's Office is pleased to provide this online tool for searching the Assessment Roll, property values, Value Change Notices and Prop 8 Notices.

The Assessment Roll is a public document that lists property values and location information for all taxable real estate, business property and personal property in the county. Information displayed here is current as of the most recently published Assessment Roll and parcel maps are updated monthly.

If you have a disability and the format of any material on our website interferes with your ability to access information on this site and you need accessibility assistance, please visit our Accessibility Information page for information on how to request help.

Searching the Assessment Roll, Assessed Value Change Notices and Prop 8 Notices:

Since August 2011, all Assessed Value Change Notices and Prop 8 Notices have been available primarily through this website.

There will not be a notice generated for every property. If your property changed owners or had new construction in 2012, or if the assessed value was adjusted due to a Prop 8 review, then your search should return a notice.

As a cost savings measure, the Assessed Value Change Notices and Prop 8 Notices will no longer be mailed through the U.S. Postal Services unless specifically requested.


To search current assessed property value, and to view and/or print a notice please:

  1. Read and agree to the disclaimer below then click “Continue”.
  2. Enter your parcel number or street address.
  3. Click on the underlined parcel number to view the current assessed value for that property.
  4. If you believe your property is eligible for a notice, you may click on the “View/Print Value Notice” link located near the top of the property information page.
  5. If no notice is found at that time, then your property was not eligible for a notice this year.

Please Note: Some users are getting a certificate error when searching the assessment roll - the software vendor is aware of this issue and working to fix it. If you get an error, please do the following:

  • Make sure to add to trusted web sites
  • If you still get this error and are using Internet Explorer, click "Continue to this website (not recommended)"
  • If using Chrome, click on the "Advanced" link and then choose "Proceed"
  • If using Firefox, add the exception

We apologize for any inconvenience this may cause.


** Any resale of this information is prohibited **

I have read the disclaimer below and AGREE to the terms and conditions set forth below.
I have read the disclaimer below and DO NOT AGREE to these terms and conditions.

Skip to detailed search instructions


Additional Assessment Information Available 24 hours a Day by Phone:

Use the Assessor's Interactive Voice Recognition (IVR) system to obtain assessment value information any time of the day or night! Speak, or enter the parcel number using the phone keypad, to hear the parcel's assessed values by assessment category (land, improvements, personal property, exemptions, and the net assessed value).

For additional information, request a fax-back and receive the assessed values by category, plus the assessee, the assessee's mailing address, the parcel's situs address, and the parcel's tax rate area (TRA) code by fax!

Please note that Assessment Notices and Prop 8 Notices are not currently available through this system.

24 hour property information (707) 565-3010.

Property Tax Searches:

To search property tax record information or pay property taxes online, please visit 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 the Tax Collector Interactive Voice Response (IVR) and fax-back system at (707) 565-3010.

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Important Information:

Please read our disclaimer, then check the box next to the statement below indicating that you have read the disclaimer and agree to its terms. Note: The “Continue” button will only work after you check the box declaring you have read the disclaimer. A search window will open a new page so these instructions can remain available during your search.

Privacy Notice:

To protect your privacy, we do not display address information in the results of any searches you perform on this web site. California Government Code § 6254.21 prohibits the display of home addresses or telephone numbers of any elected or appointed official on the Internet by any state or local agency without first obtaining the written permission of that individual.

To comply with the statute, property searches are allowed by parcel identification numbers and address. Searches by name are no longer available and the search results will not include owner name. We are sorry for any inconvenience this may cause.


This service has been provided to allow easy access and a visual display of County Assessment information. All reasonable effort has been made to ensure the accuracy of the data provided; nevertheless, the data may be out of date and is for assessment purposes only. No liability is assumed for the accuracy of the data. Do not make any business decisions based on this data before validating the data with the Sonoma County Clerk-Recorder-Assessor's Office. [California Revenue and Taxation Code § 408.3(d)]. The County of Sonoma assumes no responsibility arising from use of this information. Associated Data Are Provided Without Warranty of Any Kind, either expressed or implied, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose.

Back to Search

Detailed Search Instructions:

Search for property information, current assessed value or assessment notices by using the Assessment Number, Parcel Number, or Street Address. You may use partial assessment numbers or street addresses. To find all the properties on a street, type in the street name and select “Contains” from the drop-down menu.

  1. Type all or part of the information in the appropriate text box under “Search Criteria”

  2. An example of information entered in text box
  3. Select a “Search Type” from the drop-down menu in the row corresponding to the search criteria you have chosen (The default is “Begins with”).
    • Enter the street name and select "Contains" to return a list of all properties on a street
    • If there are no results, try leaving out Rd, St, Way, etc.
  4. Click “Submit” to display a list of results .
  5. Click the underlined assessment number of a record in the results list to view the current assessed value for that property. This is the value that your property tax bill will be based on.

  6. Screen shot of the underlined assessment number
  7. If you believe your property qualifiied for an Assessment Value Change Notice or Prop 8 Notice, click on the “View/Print Value Notice” link at the top of the detailed property information page to view the notice.

    Please note: There will not be a notice for every property! If there is no notice for your property, then your property does not qualify for one at this time.

  8. Screen shot of the View/Print Value Notice link

  9. The current assessed value (the value your property tax bill will be based on), is on the Property Information page illustrated above. Notices reflect the same assessed value and provide additional information regarding the event that changed the value. The property value on that page is the current value regardless of whether or not that property should receive a notice.

  10. To view the parcel map for this property, click on the “View Maps” link at the top of the property information page.

  11. Screen shot of the View Map link


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The Assessor map results of this search are saved in the TIFF format. If you are having trouble viewing these images, download the following free software.

No Results?

If your search doesn't result in any results, you may want to broaden your search criteria. For example, if you searched an address you know to be current and got no results, try leaving off the street type designation (e.g. Street, Avenue, Road). You can also broaden searches by selecting “Contains” instead of “Begins with” from the “Search Type” drop-down menu in the second column. Keep in mind that the amount of time it takes to return a results list will increase with broader searches.

Please note: Not all properties will receive a notice!

A Notice search with no results indicates that the property you looked up didn't qualify for a notice this year and the current assessed value is the one that shows in the basic property search.

How to Correct Wrong or Missing Information

What if your search results indicate that some of the information we have on file is incorrect? For instance, suppose you think that we are maintaining an incorrect value or lot size on our records? In this or similar situations, please contact us and we will investigate your concern and take steps to correct any wrong or missing information.

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The Assessor map results of this search are saved in the TIFF format. To view these files, download the following free software.

We are always interested in receiving your feedback and/or questions. You are invited to visit our office Monday through Friday 8 a.m. to 5 p.m., or send me an email.

William F. Rousseau
Sonoma County Assessor

Important Notice: The 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.