Proposition 19: What California homeowners — and their heirs — need to know

Prop 19 passed in November 2020 and went into effect in early 2021. It didn't make headlines for long — but its impact on California families has been significant and lasting. Whether you're a homeowner thinking about your legacy, a child expecting to inherit property, or a 55+ seller considering a move, this law affects your finances in ways most people still don't fully understand.

Prop 19 works in two directions: it restricted a long-standing inheritance tax break, and it expanded a benefit for qualifying sellers.

Before 2021, California parents could transfer virtually any property to their children and pass along the low assessed tax value, no questions asked. A rental property bought in 1985 could pass to adult children at the 1985 tax rate.

That's gone. Now the parent child exclusion applies only to a primary residence, and only if the child moves in and occupies it as their primary home within one year. Even then, if the market value exceeds the assessed value by more than $1 million, a portion of that difference gets added to the taxable base.

The good news: if you're 55 or older, severely disabled, or a wildfire or disaster victim, Prop 19 significantly expanded your ability to take your low assessed tax base with you when you move.

Previously, portability was limited to a few participating counties and could only be used once. Under Prop 19, you can now transfer your existing assessed value to a replacement home anywhere in California — and do it up to three times. If your new home is more expensive, only the value difference is added to your base.

Here's where estate planning intersects with Prop 19 in ways many families don't discover until it's too late.

A revocable living trust does not protect an inherited property from reassessment under the new rules. The trust is transparent for tax purposes — what matters is the use of the property after transfer, not the vehicle used to transfer it. If a child inherits a rental property through a trust and doesn't occupy it as a primary residence, the county will reassess it at current market value.

For homeowners who qualify for the portability benefit and whose estate plan was written before 2021, it's worth reviewing that plan with an estate attorney. Older wills and trusts were often structured around the pre-Prop 19 rules, and they may not be optimized (or may even conflict) with how the law works today.

One scenario worth noting: a 55+ seller who qualifies for base-year value portability and also holds appreciated property they'd like to pass on should think carefully about the sequencing of any move, sale, and estate transfer. Timing can make a real difference.

• California State Board of Equalization — Official Prop 19 Overview ↗
• Legislative Analyst's Office — Prop 19 Fiscal Analysis ↗
• California Taxpayers Association — Prop 19 Summary ↗
• County Assessors' Foundation — Local assessment resources ↗

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