How California Property Tax Appeals Really Work
Learn how California’s property tax appeal process works. Understand the roles of the Assessor’s Office, the independent Assessment Appeals Board, and how to file Form BOE-305-AH to challenge your property’s assessed value.
🏛️ The Key Players
There are two main bodies involved in a property tax appeal:
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The Assessor’s Office
- They determine your property’s assessed value each year.
- They defend that value if you challenge it.
- They can also reduce it voluntarily if they agree it’s too high — which is why they often suggest an “informal review” before anything becomes official.
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The Assessment Appeals Board (AAB)
- This is a neutral, independent board created by state law.
- It operates under the County Board of Supervisors, not the Assessor.
- Its members are usually trained citizens — retired appraisers, accountants, or real estate professionals.
- Their job is to act as a kind of mini-court for property tax disputes, hearing both sides and deciding what’s fair.
📄 The Formal Appeal Process (Step by Step)
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You file the BOE-305-AH form
- This goes to the Clerk of the Assessment Appeals Board, not the Assessor.
- It must be filed during the county’s annual filing window (usually July 2 – Nov 30).
- Once filed, it officially protects your right to contest that year’s assessment.
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The Clerk logs it and notifies the Assessor’s Office
- The Assessor receives your appeal and must respond.
- They might contact you to discuss your evidence and see if the issue can be resolved informally.
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Optional: Informal review or “stipulation”
- Before any hearing, the Assessor can review your comparables and may agree that your property was overvalued.
- If you both agree on a new value, you sign a stipulation — a short settlement form.
- The AAB then typically approves it automatically.
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If no agreement, you get a hearing date
- The Clerk schedules a hearing, and you’ll receive a Notice of Hearing.
- At the hearing, you present your data (sales, photos, appraisals) and the Assessor presents theirs.
- It’s formal but not intimidating — more like a business meeting than a courtroom.
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The Appeals Board makes a decision
- The AAB’s ruling is final for that tax year.
- The Assessor must follow it and correct your assessment.
- If you still disagree, your next step would be Superior Court, but that’s rare.
⚖️ In Simple Terms
- The Assessor is like the prosecutor — they propose the value.
- The Assessment Appeals Board is the judge and jury — neutral and independent.
- The Clerk of the Board is the court clerk — handling your form, schedule, and paperwork.
Once you’ve filed, the Assessor cannot block your appeal, and the Board’s decision overrides theirs.
💡 How Boards Think
The Assessment Appeals Board isn’t looking for arguments — it’s looking for clarity.
- They rely on data, not emotion.
- They weigh both sides’ evidence — whoever’s analysis of market value is more credible usually wins.
- They appreciate homeowners who are organized: clear comparables, consistent January 1 lien date, and reasonable adjustments.
If you approach your case like that, you’ll speak the Board’s language.