California property glossary
Proposition 19
Also called Prop 19, Home Protection for Seniors, Severely Disabled, Families, and Victims of Wildfire or Natural Disasters Act
Quick answer
Proposition 19 narrowed California's parent-child property tax exclusion — an inherited home is now only excluded from reassessment if the heir makes it their principal residence, and even then only up to a capped amount — while separately letting owners 55+, severely disabled, or wildfire victims move their assessed value to a replacement home anywhere in the state.
Key facts
- Effective
- 16 February 2021 for the parent-child provisions
- Condition for exclusion
- The heir must make the inherited home their own principal residence
- Cap
- The exclusion is limited; assessed value above the statutory ceiling is added back. The ceiling is adjusted over time — confirm the current figure with the county assessor
- What is no longer excluded
- Inherited rentals, second homes and most non-residence property
- Base-year transfer
- Owners 55+, severely disabled, or wildfire/disaster victims may carry assessed value to a replacement primary residence anywhere in California
- Administered by
- The county assessor, with filing requirements and deadlines
What it means
Before Proposition 19, a parent could pass a home and a broad band of other property to a child without triggering reassessment. After it, the exclusion applies only where the child makes the inherited home their own principal residence, and it is capped — above a statutory ceiling, the excess is added back to the assessed value. Property that is not the heir's principal residence is reassessed to market value.
For families this is the single most consequential change in California property tax in a generation. A house held for decades under a low Proposition 13 base can carry a modest annual bill; reassessed at market value on inheritance, that bill can multiply. Heirs who intended to keep a property as a rental frequently discover the carrying cost is far higher than the parent's was.
The second half of Proposition 19 works in the owner's favour. Homeowners who are 55 or older, severely disabled, or who lost a home to a wildfire or declared disaster may transfer their existing assessed value to a replacement primary residence anywhere in California, and may do so more than once. It removed the old restriction that the replacement had to be in the same county or one that had opted in.
Both halves have filing requirements and deadlines administered by the county assessor, and the ceiling on the parent-child exclusion is adjusted over time. Anyone relying on either provision should confirm the current figures and forms with the assessor for the county the property sits in, because this is a tax question with real money attached and the details are set by statute rather than custom.
Why this matters when you are selling
The practical effect shows up as a bill. A house held for thirty years under a low Proposition 13 base can carry an annual property tax a fraction of what a current market assessment would produce. When it passes to a child who does not move in, the assessment resets — and heirs who planned to hold the property as a rental often find the new carrying cost changes the arithmetic entirely. That is not a reason to sell, but it is a number that belongs in the decision.
The confusion that costs people most is between Proposition 19 and stepped-up basis. They are different taxes administered by different authorities. An inherited house can simultaneously have a favourable income-tax basis, so that selling produces little capital gain, and a reassessed property tax bill several times the parent's. Treating one as evidence about the other leads to bad decisions in both directions.
Common mistakes
Assuming an inherited home keeps the parent's low tax bill automatically.
Instead: It keeps it only if the heir makes it their principal residence, and then only up to the cap. Otherwise it is reassessed.
Confusing Proposition 19 with stepped-up basis.
Instead: Proposition 19 is California property tax. Stepped-up basis is federal income tax. Neither tells you anything about the other.
Missing the assessor's filing deadline for a claim.
Instead: Both halves have forms and deadlines. Contact the county assessor early rather than after the first reassessed bill arrives.
Questions people ask
Does Proposition 19 mean I have to sell an inherited house?
No. It changes what the property costs to hold, not whether you may keep it. Heirs who move in may qualify for the exclusion; heirs who do not will generally face a reassessed bill. The decision to keep, rent or sell should follow from the actual numbers — the new assessment, the mortgage if any, insurance, and what the property earns — rather than from the reassessment alone.
Can I still transfer my assessed value if I move?
If you are 55 or older, severely disabled, or lost a home to a wildfire or declared disaster, Proposition 19 generally allows you to carry your assessed value to a replacement primary residence anywhere in California, and to do so more than once. The mechanics and any adjustment where the replacement is more expensive are handled by the county assessor.
Bottom line
Proposition 19 turned inheritance into a property tax event for most heirs who do not move into the home. It is a cost to plan around rather than a verdict, and the county assessor — not a general article — is the authority for a specific property.
Official sources
- California State Board of Equalization — Proposition 19
The official overview of both the parent-child and base-year-transfer provisions, including current forms.
Written and maintained by Sierra Property Buyers, a direct property buyer working across Northern California. Last reviewed August 2026. This page is general information about how California property transactions work — it is not legal, tax, or financial advice, and the specifics of any situation should be confirmed with an attorney, a CPA, or the relevant agency.
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