How to appeal a Siskiyou County, CA property assessment

Supplemental Assessment: No later than 60 days after the date on which the assessee was notified by Supplemental Assessment Notice Regular Assessment: July 2 through November 30

Checked Oct 25, 2026.

Appeals are filed with the Clerk of Assessment Appeals Board, Clerk's Office.

Checked Oct 25, 2026.

Assessment Appeals

Checked Oct 25, 2026.

November 1 Property owners First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.

Checked Oct 25, 2026.

December 10 Property owners First installment of taxes on the secured roll, if unpaid, is delinquent at 5:00 p.m. or close of business day, whichever is later.

Checked Oct 25, 2026.

February 1 Property owners Second installment real property taxes due and payable.

Checked Oct 25, 2026.

April 10 Property owners Second installment of taxes on the secured roll, if unpaid, is delinquent at 5:00 p.m., or close of business day, whichever is later.

Checked Oct 25, 2026.

When delinquent dates fall on a Saturday, Sunday, or a legal holiday, the hour of delinquency is 5:00 P.M. on the Next Business Day.

Checked Oct 25, 2026.

If your first installment amount is unpaid after December 10, a 10% penalty is added to the first installment amount due. If your second installment amount is unpaid after April 10, a 10% penalty plus a $20.00 cost fee is added to the second installment amount due.

Checked Oct 25, 2026.

Jennifer Taylor, Treasurer-Tax Collector

Checked Oct 25, 2026.

530-842-8340

Checked Oct 25, 2026.

Craig S. Kay, Assessor-Recorder

Checked Oct 25, 2026.

530-842-8036

Checked Oct 25, 2026.