THIS ASSESSMENT REDUCTION FILING SERVICE IS NOT ASSOCIATED WITH ANY GOVERNMENT AGENCY. IF YOU DISAGREE WITH THE ASSESSED VALUE OF YOUR PROPERTY, YOU HAVE THE RIGHT TO AN INFORMAL ASSESSMENT REVIEW, AT NO COST, BY CONTACTING THE ASSESSOR’S OFFICE DIRECTLY. IF YOU AND THE ASSESSOR CANNOT AGREE TO THE VALUE OF THE PROPERTY OR IF YOU DO NOT WISH TO CONTACT THE ASSESSOR YOU CAN OBTAIN AND FILE AN APPLICATION FOR CHANGED ASSESSMENT WITH THE COUNTY BOARD OF EQUALIZATION OR ASSESSMENT APPEALS BOARD ON YOUR OWN BEHALF. AN APPEALS BOARD HAS THE AUTHORITY TO RAISE PROPERTY VALUES (BUT IN NO CASE HIGHER THAN THE PROPOSITION 13 PROTECTED VALUE) AS WELL AS TO LOWER PROPERTY VALUES.
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Products and resources

Two owner-filed products for eligible Riverside, Los Angeles, and San Diego County homes. No Valuvia fee is due before verified county filing.

County Assessor

Prop 8 Informal Request Package

Free

No county informal-review fee

Valuvia prepares the owner-filed informal request. After verified filing, supporting comparable-sales documents unlock free.

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County Assessment Appeals office

Formal Appeal Package

$45

County filing fee is separate

Valuvia prepares the owner-filed formal application. After verified filing and payment, the remaining evidence and hearing materials are unlocked.

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Guides

California property tax guide

Proposition 13, notices, and the statewide appeals framework.

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Riverside & Los Angeles filing guide

Current county filing paths, formal fees, deadlines, and official sources.

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Proposition 8 guide

Informal decline-in-value review, formal appeals, and later-year reassessment.

Read guide →

General information only—not legal, tax, or appraisal advice. Open Customer Care →