Prop 19 parent to child: can you keep the low tax base?

Last updated September 14, 2026

By Kurt Mellinger, Principal Agent, Ascension Estates at Equity Union Real Estate. DRE #02238998.

Only if the child moves in. Since February 16, 2021, Proposition 19 lets a child keep a parent's low property tax base on one property, the family home, and only when the child makes that home their own principal residence and claims the homeowners' exemption within a year of the transfer. Even then the break is capped. The exclusion covers market value up to $1,000,000 above the parent's existing assessed value, and anything above that line is added to the new assessment. A house kept as a rental gets no exclusion at all.

This is the other half of Proposition 19. The half people usually read about lets homeowners 55 and older carry a low tax base to a new home, and we cover that in Prop 19 explained with a calculator on the Prop 19 tax transfer page. This page is about what happens when a home moves down a generation, which is the half that took something away.

What changed on February 16, 2021?

Before that date, California ran on Proposition 58 for parent to child transfers and Proposition 193 for grandparent to grandchild transfers. Those rules were generous. A parent could pass a principal residence of any value to a child and the child kept the low Proposition 13 base, whether the child ever set foot in the house or rented it out the following week. On top of that, a parent could pass up to a million dollars of assessed value in other property, meaning rentals, land and commercial buildings, with the same protection.

Proposition 19 replaced both of those for transfers on or after February 16, 2021. Two things changed and both of them bite.

The date is what governs, and the date is the date of transfer. For an inheritance that is the date of death. Estates settled under the old rules stay under the old rules, which is why you will still meet people whose family keeps a 1970s tax base on a rental in Encino. That door is closed for anyone transferring today.

Who counts as a parent and who counts as a child?

Broader than people assume, and narrower in one place that surprises them.

What does the child actually have to do?

Three things, in a short window, and missing any one of them costs the whole benefit.

1. The home has to have been the parent's principal residence. It qualifies as the family home when the parent held the homeowners' exemption or the disabled veterans' exemption on it. A parent who moved to assisted living years ago and rented the house out has a harder case. Ask the assessor.
2. The child has to move in and make it their own principal residence. Living there is the requirement. Owning it and visiting it is not.
3. The child has to file for the homeowners' exemption or the disabled veterans' exemption on that home within one year of the transfer, and file the parent to child exclusion claim with the county assessor. The exclusion claim form is BOE-19-P. The assessor's office publishes both forms and both deadlines.

That one year clock is where families lose this. A year sounds like a lot while you are grieving, clearing out a house, dealing with siblings and waiting on a probate calendar. It is not a lot. Put the date on a calendar the week the transfer happens and call the Los Angeles County or Ventura County Assessor early rather than late. They answer the phone and they would rather tell you the rule now than reassess you later.

How does the $1,000,000 exclusion work?

The exclusion sits on top of the parent's existing assessed value. Assessors call that assessed value the factored base year value, which is the original purchase price adjusted upward by the annual Proposition 13 increase over the years the parent owned it. It is the number on the property tax bill, and it is usually far below market value on a home held for decades.

The test has two steps.

1. Add $1,000,000 to the parent's factored base year value. That is the line.
2. Compare the market value of the home on the date of transfer against the line. At or below it, the low base transfers whole and the child keeps the parent's assessed value. Above it, the excess over the line is added to the base, and the child's new assessed value is the parent's base plus that excess.

Two things follow from that shape, and both are worth sitting with. First, the benefit is still very large in Los Angeles and Ventura counties, because even a capped transfer can leave a child paying tax on a fraction of market value. Second, the higher the home's value has climbed above the parent's base, the more of the break the cap eats.

The $1,000,000 figure is adjusted over time. The California State Board of Equalization publishes the current amount, and your county assessor applies it. Confirm the figure that applies to your transfer date before you plan around it, because it moves.

What happens to a rental, a second home or a vacation home?

It is reassessed at full market value, with no exclusion. This is the change that hit California families hardest and it gets the least attention.

Under the old Proposition 58, a parent could pass other real property to a child and shelter up to a million dollars of assessed value on it. Proposition 19 deleted that entirely. A duplex in Van Nuys that a family has held for decades and rented out for two generations now comes back onto the roll at today's value the moment it passes to a child. The new tax bill can be several times the old one, and it arrives whether or not the rents cover it.

Family farms follow their own version of the Proposition 19 rules, with a separate claim form and separate requirements. If a farm is in the picture, that is a conversation for a CPA and an attorney who handle agricultural property.

What if two children inherit and only one moves in?

The assessor looks at the interests that transferred, so the answer usually depends on who ends up owning what and who lives there. A common plan is for the child who wants the house to buy out the siblings, which keeps that child on title and living in the home while the others take cash.

That buyout has moving parts. It needs a value everyone accepts, it usually needs financing, and the timing has to work against the one year occupancy deadline. Get the assessor's guidance on how they treat your specific split in writing before anyone signs a deed, because a plan that works on paper can fail on a technicality about which interest was excluded.

What if the child moves out later, or sells?

The exclusion depends on the home continuing to be the child's family home. If the child stops living there, the assessor can take the exclusion away going forward and put the property back on the roll at market value from that point. Different counties handle the mechanics differently, so ask your assessor how they apply it before anyone lists the house or moves out of it.

A sale ends the question entirely. The buyer gets their own assessment at what they pay, which is how Proposition 13 has always worked.

There is one more piece people run together, and they are separate systems. The property tax base and the income tax basis have nothing to do with each other. Inherited property generally gets a new income tax basis at the date of death value under Internal Revenue Code section 1014, which is what keeps capital gains small when a family sells soon after inheriting. That step up happens whether or not anyone qualifies for the Proposition 19 exclusion. We walk through that in selling an inherited house in California. Have a CPA apply it to your facts.

This is not tax or legal advice. Proposition 19 turns on dates, exemption filings, trust language, how title is held and how interests are divided among heirs, and none of that is visible to us. Use a CPA and an estate planning attorney, and confirm every rule, form and figure on this page with your county assessor or the California State Board of Equalization before you act on it.

How does this change the decision to keep or sell?

Families arrive at this fork constantly, and the honest answer is that the property tax outcome is one input rather than the whole decision.

One honest limitation. We are real estate agents. We can tell you what the house is worth today, what it would net after every cost, and what a buyout would take to finance, and those are the numbers most families are missing when they have this argument. We cannot tell you whether your transfer qualifies, we cannot file your forms, and we will send you to a CPA and the assessor every time. Get those two conversations started early, because the clock in this rule runs from the transfer date rather than from the day you get around to it.

If a value is the piece you are missing, the free Equity & Exit Report gives you a projected list price for the address, the net proceeds after every cost of a sale, and a real cash offer range. That is enough to put a number next to each option before anyone decides.