Translate Site

Dates To Remember

January 1, 2021
12:00 AMProperty Tax Lien DateThe date when property taxes for any fiscal year become a lien on property. (Currently 12:01 a.m. January 1 of each year).
February 1, 2021
All Day EventSecond Installment DueSecond installment due - Secured Property Tax Bill.
February 15, 2021
All Day EventLast Day to File a Timely ClaimLast day to file a timely claim for most exemptions.
April 1, 2021
All Day EventBusiness Property and Vessel Property Statements DueBusiness Property and Vessel Property statements due.
April 10, 2021
All Day EventLast Day to Pay Second InstallmentLast day to pay second installment of Secured Property Tax bill before penalties are added or the next business day if the date falls on a weekend or holiday.
May 7, 2021
All Day EventLast Day to File Business Property StatementsLast day to file Business Property and Vessel Property Statements before a 10% penalty is added. If the date falls on a weekend or holiday the deadline is the next business day.


Coronavirus Announcement: Public Access

Attention: Until further notice, public access to all Orange County Assessor's Department office locations (Orange and Mission Viejo) will be temporarily closed effective Friday, December 11, 2020.

Many of our services are available through our website, by mail and phone.

This action is a precautionary measure to help slow the spread of the Coronavirus (COVID-19) based on recommendations from State and Local officials. If you have any questions, please contact us at (714) 834-2727.

Thank you for your cooperation and patience.

Wildfire Victims


If your property has suffered over $10,000 in property damage due to the recent wildfires, you may qualify for temporary property tax relief.

State law allows County Assessors to temporarily reduce the value of property that has been damaged by a calamity. This includes damage to all property subject to property taxes such as homes, mobile homes, boats, businesses and business personal property.

The Office of the Assessor will assist eligible property owners to ensure that they receive the full benefits as provided by law.

Applications must be filed within 12 months of when the property was damaged and can be found here.

Please contact the Assessor Department for further information at (714) 834-2727.


Annual Property Value Notices Have Been Mailed

You may receive a Property Value Notice due to changes in ownership, new construction, or other activities to your property.  Also, you may receive a notice if your Taxable Value has been temporarily reduced under Proposition 8 (decline in value), or if your Taxable Value has been returned to its Proposition 13 Value (factored base year value).

Proposition 13 establishes a Base Year Value for real property when it was acquired and limits increases in the Taxable Value to an inflation rate not to exceed 2% annually plus any new construction.

Property owners will not receive a Property Value Notice if the Taxable Value is equal to their prior year’s Proposition 13 Value plus an inflation rate. If you have questions about this change or would like to request a copy of your Property Value Notice, please contact the Assessor Department at (714) 834-2727.

If you disagree with the valuation of your property, after receiving the notice or the tax bill, please contact the Assessor Department at (714) 834-2727. We welcome the opportunity to answer any of your questions and explain your assessment. However, if after contacting the Assessor Department, your value concerns are not resolved, you can file an assessment appeal.

Assessment Appeals Application must be filed between July 2 and November 30 (the new extended appeals filing date). Please contact the Clerk of the Board of Supervisors, Assessment Appeals Division, for more information on filing an Assessment Appeal Application form at (714)834-2331 or online at

If you were mailed a Beige Notice, this indicates that your Taxable Value is the Proposition 13 Value and may reflect changes in ownership, new construction, other property activities, or returned to its Proposition 13 Value.

View Sample Notice

If you were mailed a Blue Notice, this indicates that the Taxable Value of your property is LOWER than your Proposition 13 Value.

View Sample Notice

A Supplemental Assessment Notice is Sent When Property is Reassessed

State law requires the Assessor to revalue property when it changes ownership, and to add the value of new construction when it is completed.

Changes in the ownership of real estate, or building something new may generate a one-time Supplemental Assessment Notice.

Supplemental notices are mailed several times each year.