Over 55 in California, You Can Sell the House and Take Your 1985 Property-Tax Bill With You to the New One, Anywhere in the State, Up to Three Times

Californians 55 or older can transfer their decades-old property tax assessment to any replacement home in the state, up to three times.

The transfer only works cleanly if the replacement costs equal or less; a pricier home raises the transferred assessed value by the price difference.

The benefit is not automatic, so be sure to file a BOE claim with the county assessor within two years or lose the transfer entirely.

If you're 55 or older, own a California home you bought decades ago, and want to downsize without your property-tax bill exploding, Proposition 19 was written for you. You can sell your longtime primary residence, buy a replacement anywhere in California, and carry your old assessed value with you, up to three times in your lifetime.

California limits how much a property's assessed value can rise each year as long as the same owner holds it. That means a long-time owner pays tax on a value anchored to their original purchase price, even as market values climb far above it. Assessed value is just the taxable number on the county's books. After forty years, the gap between that number and today's market value can be enormous, and it is exactly why so many older Californians feel trapped in place. Selling typically means giving up a tax bill that you can never recreate.

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Portable Tax Base Most Owners Never Claim

Under Proposition 19, a homeowner who meets the qualifying age, or who is severely disabled, or who is a victim of a wildfire or declared disaster, may transfer the assessed value of their existing primary residence to a replacement primary residence. This is called a base year value transfer: your old base year value (the anchor figure that sets your tax) follows you to the new home. The replacement may be anywhere in California, an expansion over prior rules that limited transfers to the same county or to participating counties. Older articles describing county limits are out of date.

The authority is California Proposition 19, approved by voters in November 2020, with base year value transfer provisions effective April 1, 2021, and codified in California Revenue and Taxation Code Section 69.6. The California State Board of Equalization publishes the claim forms and guidance, and each county assessor administers the filing.