San Joaquin County Assessor Steve J. Bestolarides

Office of the Assessor

The Office of the Assessor is dedicated to preparing fair and equitable assessments to all taxable property in San Joaquin County. The County Assessor has a constitutional responsibility to determine the value of and assess all taxable property in the County. That assessment is used to compute the annual property tax bill. The 2024-2025 property tax assessment roll grew to $116.1 billion; over $1 billion in property tax dollars that support education, public safety and local services.

Office of the Recorder-County Clerk

The Office of the Recorder-County Clerk is committed to providing excellent, cost-effective service to the public. The Office maintains public records, records documents, and files notary public bonds. The Recorder-County Clerk issues and registers marriage licenses, vital statistics and other public documents. Additionally, the Recorder-County Clerk receives passport applications on behalf of the U.S. Department of State.

Steve J. Bestolarides

Assessor-Recorder-County Clerk

Important Dates

16 May

Filing period for Senior Citizens Tax Assistance

May 16, 2026

The filing period for Senior Citizens Tax Assistance is May 16 - August 31.

30 Jun

Completed Assessment Roll Delivered

June 30, 2026

The San Joaquin County Assessor-Recorder-County Clerk delivers the completed assessment roll to the San Joaquin County Auditor-Controller.

03 Jul

Filing Period for a Formal Appeal of Assessed Value Begins

July 3, 2026

The filing period, with the San Joaquin County Clerk of the Board of Supervisors, for a reduction in assessed value is July 3- November 30.

Note: These dates apply specifically to San Joaquin County. If you own property in another county, check with that county’s Assessor’s office for the filing period dates.