How California's Prop 19 Inheritance Rules Work - and What Homeowners Need to Do to Protect the Tax Break
Does California Prop 19 still let parents transfer a home to their kids without a property tax increase?
Yes, but only under specific conditions. Under Prop 19, which took effect for inherited transfers on February 16, 2021, a child must move into the inherited home and use it as their primary residence within one year of the transfer to qualify for any assessed-value protection. Homes used as rentals or vacation properties no longer qualify for the exclusion under current California law.
How long do I have to file a Prop 19 exclusion claim with my county assessor?
Generally, you have three years from the date of the property transfer, or before the property is transferred again, whichever comes first. You also typically need to have established the home as your primary residence within one year of the transfer. Deadlines and form requirements vary by county, so contact your county assessor's office promptly after any transfer occurs.
What happens to my parents' low property tax bill if I inherit their California home but don't live in it?
If you inherit a California home after February 16, 2021, and don't move in as your primary residence, the property will generally be reassessed at its current fair market value as of the transfer date. That means your annual property tax bill will reflect today's market value, not your parents' original purchase price, which can result in a substantially higher bill in most California markets.
What is the $1 million threshold in California's Prop 19 parent-child transfer rule?
Under Prop 19, if the inherited home's market value at the time of transfer exceeds the parent's existing assessed value by more than $1 million (a figure indexed for inflation), only part of the gain is excluded from reassessment. The child's new taxable assessed value becomes the market value minus $1 million, rather than the parent's full base year value. Confirm the current indexed figure with your county assessor.
Can grandchildren inherit a California home under Prop 19 and keep the low property tax base?
Grandchildren can qualify for the Prop 19 parent-grandchild transfer exclusion, but only if both of their parents are deceased at the time of the transfer and the grandchild moves into the inherited home as their primary residence. The same one-year residency and three-year claim-filing requirements generally apply. Check with your county assessor's office for the specific form and documentation required.
Proposition 19, which California voters approved in November 2020 and which took effect for inherited property transfers starting February 16, 2021, fundamentally changed the rules for passing a home's low property tax base to your children or grandchildren. The old rules were generous and largely unconditional; the current ones are not. Many California families are losing significant tax savings simply because they don't know what the law now requires them to do, or how fast they need to do it.
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What Prop 19 Changed From the Old Rules
Before Prop 19, California's Proposition 58 allowed parents to transfer a primary residence - plus up to $1 million in assessed value of other property - to their children without triggering a reassessment. That meant a child could inherit a house their parents bought in 1978 and keep paying taxes on the 1978 assessed value, regardless of whether the child ever lived there.
Prop 19 eliminated that broad protection. Now, to preserve the inherited low tax base on a home, the child who inherits it must move in and use it as their primary residence. Investment properties, vacation homes, and rental properties no longer qualify for any assessed-value protection under the parent-child transfer exclusion, regardless of how low the parent's tax bill was.
How the New Exclusion Actually Works
If an eligible child (or, in some circumstances, a grandchild, when both parents are deceased) does move into the inherited home as their primary residence, the tax benefit doesn't automatically equal the parent's old bill. Instead, the county assessor compares the home's current fair market value at the time of transfer to the parent's existing assessed value (called the "factored base year value").
If the market value is less than or equal to the parent's assessed value plus $1 million, the child simply takes over the parent's low base year value, and there's no reassessment. But if the market value exceeds the parent's factored base year value by more than $1 million, only part of the gain is excluded - the child's new assessed value becomes the market value minus $1 million. The $1 million figure is indexed for inflation under the law, so the actual threshold in any given year may differ; confirm the current figure with your county assessor's office.
For grandchild transfers, both parents of the grandchild must be deceased at the time of the transfer for the grandchild to qualify.
The Filing Deadline That Most Families Miss
This is where many families lose the benefit entirely. To claim the exclusion, the inheriting child must file a claim form with the county assessor's office. In most counties, the form is called the "Claim for Reassessment Exclusion for Transfer Between Parent and Child" (or, for grandparent-grandchild transfers, a separate but similar form). The general rule is that the claim must be filed within three years of the date of transfer, or before the property is transferred again, whichever comes first. However, the child must also have established the home as their principal residence - typically documented through a homeowner's exemption filing with the county - within one year of the transfer.
If you miss the one-year window to establish primary residency, or the three-year window to file the claim, the county can reassess the property at current market value, which in many California markets means a tax bill that can be several times higher than what the parent paid. You do not get a do-over. Each county assessor administers this slightly differently, so contact your specific county assessor's office as soon as a transfer occurs - don't wait for the estate to fully close.
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What to Do If You've Already Inherited a Home
If you inherited a California home after February 16, 2021, and you're living in it as your primary residence but haven't filed the exclusion claim, file it now. The three-year window from the transfer date is the outer limit, and you need the homeowner's exemption on record with the county as evidence of primary residency. If the transfer happened more than three years ago and you haven't filed, consult a property tax attorney or your county assessor's office directly - options may still exist depending on the specific circumstances, but the general window has closed.
If you inherited a home and are renting it out or leaving it vacant, you generally don't qualify for any assessed-value protection under Prop 19. The property will have been reassessed to market value at the time you took title, and there is no retroactive fix for that under current law. Your county assessor can confirm the current assessed value on record and explain your appeal rights if you believe the market-value determination was incorrect.
Prop 13's Underlying Rules Still Apply
Prop 19 operates on top of Prop 13, not instead of it. Under Prop 13, which voters passed in 1978, a property's assessed value is locked in at the purchase price (or the market value at the time of any qualifying transfer) and can increase by no more than 2 percent per year, regardless of what the actual real estate market does. So if a child successfully claims the Prop 19 exclusion and takes over a parent's base year value, that value will still grow only at the Prop 13 cap of up to 2 percent annually going forward. The California State Board of Equalization oversees the general framework; individual county assessors handle the assessments and the exclusion claims.
This is general information, not legal or financial advice. Property tax rules, form names, deadlines, and threshold figures can vary by county and change over time - verify current requirements and forms directly with your county assessor's office and the California State Board of Equalization at boe.ca.gov.