How to Appeal Your Property Taxes in San Jose (Santa Clara County)

San Jose homeowners who think their assessment is too high can appeal to the Santa Clara County Assessment Appeals Board — an independent panel, separate from the Assessor, that decides valuation disputes.

When you have a case

Under California's Proposition 13, your assessed value can only rise up to 2% a year — but it doesn't drop automatically when the market softens. If your home's market value has fallen below its assessed value, a Proposition 8 appeal asks for a temporary reduction for the current year.

Check your assessed value against real recent sales (not an automated estimate). If there's a meaningful gap, you likely have a case worth filing.

The deadline

Santa Clara County's regular filing period is July 2 to September 15. Confirm the exact close date each year with the Clerk of the Assessment Appeals Board; supplemental and escape assessments carry their own 60-day deadlines. Filing late means waiting another tax year.

Build your evidence

The board weighs comparable sales above all — arms-length sales of similar San Jose homes close to the January 1 valuation date (sales more than 90 days after the lien date are excluded under §402.5). Match neighborhood, type, square footage, beds/baths, age, condition, and features. A tidy comparison of 3–5 strong comps is far more persuasive than a single number. (How to choose comps that hold up.) CompFinder assembles this for San Jose in seconds.

File and present

Submit your application to the Clerk of the Board, then present your case at the hearing if it isn't resolved first. Be organized and factual. Every $100,000 reduction is roughly $1,200/year off your bill — and it resets the base for future years. Want a sense of the upside first? See how much you can save.