Don H. Gaekle
Don H. Gaekle, Assessor

2019-20 Assessment Roll

We are pleased to announce the completion of the $52.47 billion annual Property Assessment Roll for 2019-20.  This is a 5.95% increase over the prior roll year.  The roll increase is the result of reassessments for new construction, changes in ownership, the annual review of decline in value properties, as well as from the mandated consumer price index (CPI) adjustment on existing Proposition 13 base values.  The CPI adjustment is 2% this year, however, property owners still assessed below their Proposition 13 base value in 2018 may see increases in their assessed value that are greater than 2% due to updated market valuations.

The assessment roll has been turned over to the Auditor-Controller's office where tax rates are applied to the assessed roll values in order to calculate the tax amounts due.  The Treasurer-Tax Collector has sent unsecured tax bills and will send out secured property tax bills within the next few months.

For more information, click on the following link: "About Value Increases."  Property owners may review their 2019-20 assessed value information by going to this link: Assessor Value Notice Inquiry or by accessing the same link from the Assessor “Services” drop down menu. 

If you have questions regarding your assessed value(s) you are encouraged to contact the Assessor’s Office for an explanation or to request an informal review.  If you are unable to resolve your concerns in discussions with the Assessor’s Office, you can file a formal Assessment Appeal between July 2 and December 2, 2019, by contacting the Clerk of the Board of Supervisors.

As the elected Assessor of Stanislaus County it is my sworn responsibility to uphold the State's Property Tax Laws. Our website is an ongoing part of my commitment to keeping you informed of your rights and responsibilities as property owners in Stanislaus County. To contact our office directly please call (209) 525-6461, 8:00 AM to 4:30 PM, Monday through Friday.

Thank you,

Don H. Gaekle

About Us

Who We Are

The Assessor is primarily responsible for preparing an annual assessment roll upon which property tax revenues are generated. The County, Public Schools, Cities, Redevelopment Agencies, and Special Districts all rely on this revenue for funding operations.

What We Do

All property, excluding supplies, movable equipment, boats, and aircraft, are assessed based upon their market value when purchased or newly constructed. The Assessor determines the market value for the ownership changes and new construction. The supplies, movable equipment, boats, and aircraft are assessed based upon their annual market value on January 1 of each year. The Assessor also maintains property parcel maps. These maps are available to the public in the Assessor's Office or at the County's web site ( The property tax assessment roll, property ownership information, and some property characteristics are also available to the public at the Assessor's Office.

What We Offer

The mission of the Stanislaus County Assessor's office is to produce a fair, accurate and timely assessment roll while providing excellent customer service.
Fee-based annual data subscriptions are also available. See "Assessor Services" for more information.
The Assessor's Office is open Monday-Friday, 8:00 am to 4:30 pm.