How to appeal a San Joaquin County, CA property assessment
✓ Verified — Last verified October 24, 2026
Filing details published for San Joaquin County. Match the notice and assessment cycle to the official instructions.
Official appeal instructionsNot tax or legal advice; confirm with your county.
Filing timing
Sources. Checked .
Where to file
Sources. Checked .
Officially published
Official offices
Sources. Checked .
San Joaquin County Assessor
Sources for these instructions
Sources. Checked .
Read the source quotations (14)
https://www.sjgov.org/department/cob/assessment-appeals
July 2, 2026 through 5:00 p.m., November 30, 2026.
Checked .
https://www.sjgov.org/department/cob/assessment-appeals
Clerk of the Board Office 44 North San Joaquin Street Sixth Floor, Suite 627 Stockton, CA 95202
Checked .
https://www.sjgov.org/docs/default-source/treasurer---tax-collector-documents/announcements/2026-27-secured-tax-bills-due.pdf?sfvrsn=32d3b389_1
The first installment is due and payable on November 1, 2026, and will become delinquent if not paid by 5:00 p.m. on December 10, 2026; thereafter a 10% penalty will be added.
Checked .
https://www.boe.ca.gov/proptaxes/calendar.htm
If the specified date falls on Saturday, Sunday, or a legal holiday, the action may be done on the next business day. (Government Code §§ 6706, 6707)
Checked .
https://www.sjgov.org/docs/default-source/treasurer---tax-collector-documents/announcements/2026-27-secured-tax-bills-due.pdf?sfvrsn=32d3b389_1
The second installment is due on February 1, 2027, and will become delinquent if not paid by 5:00 p.m. on April 12, 2027; thereafter a 10% penalty will be added plus a $10.00 cost to prepare delinquent tax notices for unpaid taxes.
Checked .
https://www.sjgov.org/docs/default-source/treasurer---tax-collector-documents/announcements/2026-27-secured-tax-bills-due.pdf?sfvrsn=32d3b389_1
The first installment is due and payable on November 1, 2026, and will become delinquent if not paid by 5:00 p.m. on December 10, 2026; thereafter a 10% penalty will be added. The second installment is due on February 1, 2027, and will become delinquent if not paid by 5:00 p.m. on April 12, 2027; thereafter a 10% penalty will be added plus a $10.00 cost to prepare delinquent tax notices for unpaid taxes.
Checked .
https://www.sjgov.org/docs/default-source/treasurer---tax-collector-documents/announcements/2026-27-secured-tax-bills-due.pdf?sfvrsn=32d3b389_1
Notice of 2026-2027 Secured Property Tax Due
Checked .
https://www.sjgov.org/department/ttc/tax/how-to-pay-property-taxes
San Joaquin County Treasurer-Tax Collector's Office
Checked .
https://www.sjgov.org/department/ttc/tax/how-to-pay-property-taxes
44 North San Joaquin Street, Suite 150 Stockton, CA 95202
Checked .
https://www.sjgov.org/department/assessor
44 North San Joaquin Street Second Floor Suite 230 Stockton, CA 95202
Checked .
Continue with your property
Common questions
Where do I file a San Joaquin County assessment appeal?
Clerk of the Board Office, 44 North San Joaquin Street, Sixth Floor, Suite 627, Stockton, CA 95202
Updated , from cited verification dates. Individual sources may have earlier checks.