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Many of the forms on our site are in PDF format and require Adobe Acrobat Reader.
To get the Reader click the icon below:

Please follow these instructions: To identify your property, enter only the street address (e.g. 123 Main). Do not enter a street direction (N., North, E., East, etc.) or a street title (Ave., Street, Blvd., etc.). OR, enter the 10-digit Assessor Parcel Number (At least the first 3 digits) and click on "Search".

Parcel Number:
- - -
Address:

The County of San Diego Assessor’s Office is pleased to provide this Supplemental Tax Calculator service. It must be noted that this provides an ESTIMATE only of the amount of supplemental taxes.

While the Supplemental Tax Calculator will provide estimates for all types of properties, the results are most accurate for single family residences and condominiums. Transactions on these types of properties are usually straight forward with the sales price typically reflecting the market value of the property. Change in ownership situations without a sales price (inheritance, foreclosure, etc.) will require an estimate of the market value of the property. The accuracy of the supplemental tax estimate will be dependent on the validity of the purchase price.

If the purchase price is less than the current assessed value of the property, a supplemental refund(s) will be generated.

When a change in ownership occurs you will receive a “one time” supplemental bill (or refund). If the change in ownership occurs between January 1 and May 31, two supplemental bills (or refunds) will be generated.

If you have additional questions about supplemental taxes, please call the Assessor’s Office at (858) 505-6262.

For information on Supplemental Taxes, click here.