The Ventura County Assessor’s Office is committed to helping homeowners understand their rights and the process of valuation for their property.

Real property assessment

The Assessor uses several methods for determining the value of a property. Find out what these are and how they might affect you.

Property Tax System

Better understanding the property tax system will help you better understand how we arrived at your property value.

New Homeowners

Items pertinent to new homeowners including information about property taxes, new construction, and address changes.


If you disagree with the assessed value of your property you have the right to appeal that value.

Supplemental Assessments

The supplemental roll provides a mechanism for placing property subject to Proposition 13 reappraisals due to change in ownership or completed new construction into immediate effect.

Change of Address

Property owners are responsible for notifying the Assessor promptly whenever their mailing address has changed.

Transferring your assessed value

Under Prop 19, certain individuals may qualify to transfer their base year value to a new home of equal or lesser value.

Change of ownership

All properties are required to be reassessed as of the date a Change in Ownership occurs.

Death of real property owner

The Assessor's Office must be notified upon the death of an owner within 150 days of the date of death.

New Construction

Discover what type of new construction is assessable and what is not.

Accessory Dwelling Units (ADU)

Accessory Dwelling Units (ADUs) are commonly called: granny flats, in-law units, backyard cottages, secondary units and guest quarters.

Informal decline in value review

Requesting a decline in value review is a good way to have the Assessor take a second look at your property value.