Imperial County Assessor's Office

940 W. Main Street Suite 115

El Centro CA 92243

Main Ph:(442) 265-1300

Email: assessor@co.imperial.ca.us

Supplemental Assessments

State law requires the Assessor to reappraise property upon change in ownership or completion of new construction. you will be notified by mail of the new assessed value. This notification is known as a "Notice of Supplemental Assessment".  The supplemental assessment reflects the difference between the new value and the old value. The Auditor-Controller calculates the supplemental property tax, and prorates it, based upon the number of months remaining in the current fiscal year. The fiscal year runs from July 1 through June 30.

A change in ownership or new construction completion which occurs between January 1 and May 31 results in two supplemental assessments and two supplemental tax bills. The first supplemental bill is for the remainder of the current fiscal year. The second supplemental bill is for the forthcoming fiscal year.

Notices of Assessed Value Change are mailed to property owners before supplemental tax bills are issued. Prior to the issuance of the supplemental bill, notification of the increase or decrease in value is sent to the owner at the address of record. The owner has the right to appeal the supplemental value within 60 days of the date of the notice.

Remember that supplemental tax bills are in addition to the regular annual tax bills. Supplemental bills go directly to the property owner, and not to an impound account - where one might exist.

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Imperial County