How to Lower Property Taxes in California
California's property tax system works differently from most states — thanks to Proposition 13, your assessed value is generally capped at 2% growth per year once you buy. That cap is a protection, but it doesn't prevent over-assessment at purchase or after certain events like new construction or a change in ownership. If your assessed value is higher than your home's current market value, you can file an appeal with your county's Assessment Appeals Board/AAB — and you can do it yourself, for free.
Is Your California Assessment Too High?
California assesses property at its full cash value at the time of purchase, then limits annual increases. The county assessor can also reassess upward after new construction or a change of ownership — these are the moments where errors most often creep in. Start by pulling your property's current assessed value from your county Assessor's Office website and comparing it to recent nearby sales. If comparable properties sold for meaningfully less than your assessed value, that gap is your appeal argument. Also check your property record for factual errors: wrong square footage, miscounted bathrooms, or a bedroom in unfinished space. To appeal, download the Application for Changed Assessment from your county AAB's website and file by November 30 (confirm the exact window with your county AAB). Bring three to five comparable sales and any photos or repair estimates documenting condition issues. Hearings before the three-member Assessment Appeals Board are informal — present your evidence, stay concise, and focus on the comps. If the board rules in your favor, the reduction applies to the tax year in question.
Exemptions: A Faster Way to Reduce Your Bill
An appeal challenges your assessed value; exemptions reduce the taxable portion directly, no hearing required. California offers several worth checking before or alongside an appeal:
- Homeowners' Exemption — reduces assessed value by a set amount for your primary residence. Apply once through your county assessor.
- Disabled Veterans' Exemption — a larger reduction for qualifying veterans; income limits may apply.
- Proposition 19 transfers — if you're 55 or older, severely disabled, or a disaster victim, you may be able to transfer your existing low assessed value to a replacement home in California. Check eligibility with your county assessor.
Verify current eligibility and deadlines with your county assessor — exemption rules vary and change. See also our guide to Lower Property Taxes in NJ and the Property Tax Appeal Board process.
DIY vs. Hiring a Tax Agent
California allows licensed tax agents and attorneys to represent you before the AAB, typically on contingency — a percentage of first-year savings if they win, nothing if they don't. For a straightforward overvaluation with solid comparable sales, the DIY route is very achievable. Professional help makes more sense for high-value or complex properties. For guidance on Lower Property Taxes Florida or working with a Property Tax Appeal Board in another state, see our state-specific guides.
Appealing in Other States
California's Proposition 13 framework is unusual — most states reassess annually and use different appeal bodies. If you own property elsewhere, guides are available for Protest Property Tax Texas, Florida, New York, New Jersey, Georgia, and Illinois.