How to appeal a Ventura County, CA property assessment

✓ Verified — Last verified October 25, 2026

Filing details published for Ventura County. Match the notice and assessment cycle to the official instructions.

Official appeal instructions

Not tax or legal advice; confirm with your county.

Filing timing

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Instructions based on your notice

Regular assessment appeals: July 2–September 15; if September 15 falls on a weekend, the following Monday. Supplemental, roll-change and escaped assessment appeals: within 60 days of notice mailing or postmark, whichever is later.

Officially published

Where to file

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Clerk of the Ventura County Assessment Appeals Board.

Officially published

Official appeal page

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Official offices

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Ventura County Assessor

Office website

Officially published

Phone

(805) 654-2181

Officially published

All Ventura County dates, offices and sources

Sources for these instructions

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Read the source quotations (15)
https://s48024.pcdn.co/county-executive-office/clerk-of-the-board/filing-your-assessment-appeal/
Filing dates are July 2 through September 15. If September 15 falls on a weekend, you will have until Monday, at 5:00 p.m. Applications mailed on the last day of the filing period, must be postmarked that day to be considered as timely filed. An application must be filed within 60 days of the mailing date printed on the notice of assessment, or its postmark, whichever date is later.

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https://s48024.pcdn.co/county-executive-office/clerk-of-the-board/filing-your-assessment-appeal/
The Clerk of the Assessment Appeals Board is the intermediary in the Assessment Appeal process. They receive Assessment Appeal Applications from taxpayers seeking a reduction in property value assessments

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https://www.boe.ca.gov/proptaxes/calendar.htm
§ 2605 Rev. & Tax. Code November 1 Property owners First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.

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https://www.boe.ca.gov/proptaxes/calendar.htm
§§ 2617 and 2704 Rev. & Tax. Code 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.

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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)

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https://www.boe.ca.gov/proptaxes/calendar.htm
§ 2606 Rev. & Tax. Code February 1 Property owners Second installment real property taxes due and payable.

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https://www.boe.ca.gov/proptaxes/calendar.htm
§§ 2617 and 2704 Rev. & Tax. Code 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.

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https://s48024.pcdn.co/ttc/tax-collector-faqs/
A penalty of 10% of installment amount will be added after each delinquent date + additional $30 cost fee after the April 10th delinquent date. When December 10th or April 10th falls on a Saturday, Sunday or legal holiday, the delinquency date is the next business day. Once a tax defaults on June 30th (falls into redemption status), a monthly penalty of 1.5% of the base tax will accrue until payment is made.

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https://s48024.pcdn.co/ttc/
The 2026-27 Secured Property Tax Bills have been mailed.

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https://s48024.pcdn.co/ttc/
The Office of the Ventura County Treasurer-Tax Collector

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https://s48024.pcdn.co/ttc/
Phone: 805-654-3744

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Continue with your property

Common questions

Where do I file a Ventura County assessment appeal?

Clerk of the Ventura County Assessment Appeals Board.

What's next for you

Ventura County, CA

Due date:

Official source

Set by law. Verified October 24, 2026.

§ 2605 Rev. & Tax. Code November 1 Property owners First installment of real property taxes and all taxes on personal property on the secured roll are due and payable.

Check the official source

Updated , from cited verification dates. Individual sources may have earlier checks.