For more than three decades, one of the most valuable things a California parent could leave a child was not the house itself but the property tax bill that came with it. Under the rules that applied before 2021, a child who inherited the family home, a rental duplex, or a small commercial building generally inherited the parent's low Proposition 13 assessment along with it. A house bought in Torrance in 1985 for $150,000 could pass to the next generation still taxed as if it were worth a fraction of its market value, and that was true whether the child moved in, rented it out, or let it sit.
Proposition 19, which voters approved in November 2020, ended most of that. For transfers on or after February 16, 2021, the parent-to-child exclusion is limited to the family home, it applies only if the child actually moves in, and even then it is capped. Rental property, vacation homes, and commercial property that pass to children are now reassessed to market value, full stop.
My view, after working through these rules with a lot of families, is that Proposition 19 has quietly changed the economics of more estate plans than any other development in California law in the last decade, and that most plans written before 2021 have not caught up. The documents still work, the trust still avoids probate, but the assumption underneath them (that the kids will keep the property and the taxes will stay low) is often no longer true. This article explains what the rules are now, what they cost, and what can still be done about it.
What survived, and what did not
It helps to start with what Proposition 19 did not change. Transfers between spouses (and registered domestic partners) are still excluded from reassessment entirely, so the first death in a married couple generally does not trigger a new assessment. A transfer into your own revocable trust is still not a change in ownership. And the basic Proposition 13 structure (an assessed value set at purchase, rising no more than 2% a year) is untouched for the owner who keeps the property.
What changed is the transfer from parent to child, and from grandparent to grandchild where the grandchild's parent has died. Before 2021, two separate exclusions applied: the parent's principal residence passed with its full tax base regardless of value, and up to $1,000,000 of assessed value in other real property (rentals, land, commercial buildings) passed with it too. The child did not have to live anywhere in particular.
Now there is one exclusion, for the family home (and, separately, for a family farm), and it comes with conditions that did not exist before. The home must have been the parent's principal residence. The child must make it his or her own principal residence within one year of the transfer. The child must file for the homeowners' exemption within that same year. And the exclusion is limited in amount, which is where most families get surprised.
How the family home cap works
The excluded amount is the home's current assessed value plus a fixed allowance, which started at $1,000,000 and is adjusted for inflation every two years. For transfers from February 16, 2025 through February 15, 2027, the allowance is $1,044,586. If the home's market value at the transfer is less than the assessed value plus that allowance, the child keeps the parent's tax base in full. If the market value is higher, the difference is added to the parent's assessed value, and the child's new base is the sum.
A concrete example shows what that means in practice. Assume parents bought a home in the South Bay in 1988, its assessed value today (after decades of 2% increases) is $210,000, and it is worth $1,450,000 when the surviving parent dies. The parent's assessed value plus the allowance is $1,254,586. The home is worth $195,414 more than that, so the child who moves in takes a new assessed value of $405,414. At a typical Los Angeles County tax rate of roughly 1.1%, the tax bill goes from about $2,300 a year to about $4,460 a year. That is a real increase, but it is a fraction of the roughly $15,950 a year the child would pay if the house were fully reassessed.
Now change one fact: the child does not move in, and instead rents the house out. The exclusion is not available at all, the house is reassessed to $1,450,000, and the annual property tax is roughly $15,950. Over ten years the difference between those two outcomes is well over $100,000, and that difference turns entirely on where the child lives.
The same thing happens later if the child moves in, qualifies, and then moves out. Once the home stops being the child's principal residence, the exclusion ends and the property is reassessed as of the next January 1. Another child can move in within a year and keep it alive (only one of the children needs to live there, and the exclusion can follow from one sibling to another), but someone in the family has to be living in that house for the tax base to survive.
Rental and commercial property
For property other than the family home, Proposition 19 left nothing to plan around at the parent-child level. A duplex, a rental house, a small apartment building, or a commercial property that passes from parent to child is reassessed at the transfer, whether it passes by will, by trust, or by gift during life.
Consider parents who bought a duplex in 1995 that now carries an assessed value of $320,000 and is worth $1,600,000. At roughly 1.1%, the taxes go from about $3,520 a year to about $17,600 a year when the children inherit it. The rents have not changed. Rent control (local ordinances, or the statewide cap if the property is not exempt) may limit how much of that increase can be passed through to tenants. A property that cash-flowed comfortably for the parents can break even, or lose money, for the children, and families who had planned to keep the property for the next generation sometimes discover that the math no longer supports it.
That does not mean the children should sell. It means the decision to hold or sell should be made with the post-reassessment numbers, not the parents' numbers, and the best time to make it is while the parents are alive and the plan can still be changed.
What not to do: the lifetime gift
The most common instinct, once people understand Proposition 19, is to give the property to the children now. It is almost always a mistake.
A lifetime gift is a change in ownership just like an inheritance, so the property is reassessed at the gift, and the children start paying the higher tax years earlier than they otherwise would. The gift also costs the family the step-up in income tax basis. Property received at death takes a new basis equal to its value at the date of death, which for a long-held California property usually wipes out a very large capital gain. Property received by gift carries over the parent's old basis. If the parents in the duplex example paid $250,000 for it in 1995 and depreciated it for thirty years, a gift hands the children a built-in gain of well over $1,350,000 that would largely disappear if they inherited the property instead. Federal and California income tax on that gain, if the children later sell, can easily exceed what the family would ever save by any property tax planning.
There are situations where a lifetime transfer makes sense, usually involving the federal estate tax for very large estates, but those are deliberate planning decisions, not a reaction to Proposition 19. For most families, the parents should keep the property until death and let the children inherit it with a stepped-up basis, and the planning conversation is about what happens after that.
Entities: what they can and cannot do
There is a body of planning that uses LLCs and partnerships to manage reassessment, and it is legitimate, but it is narrower than it is sometimes made to sound.
The parent-child exclusion has never applied to interests in an LLC or partnership. What applies to entities is a different set of rules. When a property is owned by an LLC, the transfer of LLC interests is generally not a change in ownership of the property unless one person ends up controlling more than 50% of the LLC. So if an LLC that has always owned a rental passes in equal shares to three children, none of whom holds more than 50%, the property may not be reassessed at all.
The catch is how the property got into the LLC in the first place. If the parents bought the property in their own names and later transferred it to their LLC (which is how most family LLCs are created), the parents became "original co-owners" under the proportional-interest rule I described in our article on holding rental property, and once more than 50% of their interests are transferred cumulatively (including at death), the property is reassessed anyway. The more-favorable result generally requires that the LLC have acquired the property from an unrelated seller, or that the property have been reassessed when it went into the entity. Arrangements put together for the purpose of avoiding reassessment, especially ones assembled in a series of steps close to a death, also invite the assessor to look through the steps to the substance of what happened.
The practical conclusion is that entity planning can work well for families who acquire new property, and it can sometimes be structured for property the family already owns, but it is not a document you add to an existing estate plan. It has to be designed around how and when each property was acquired, and it comes with the ongoing cost and administrative burden that any LLC carries in California.
The family home and the siblings
Proposition 19 creates a particular problem in families with more than one child, because the exclusion rewards the child who moves in and gives nothing to the others.
Suppose a trust leaves the family home to three children equally, and one of them moves in. The exclusion protects the home as long as that child lives there, but the child now lives in a house that two siblings own two-thirds of. If the resident child later buys out the siblings with his or her own money, the purchased interests are a transfer between siblings, which is not a parent-child transfer, and those interests are reassessed. Families who expected the "keep it in the family" arrangement to preserve the tax base often find that it preserves only the resident child's original share.
The better answer is usually to deal with this in the trust. A trust that gives the trustee authority to divide the estate on a non-pro-rata basis (so that the house is allocated entirely to the child who will live in it, and the other children receive other assets of equal value) generally allows the whole home to pass as a parent-child transfer. If there are not enough other assets to equalize, the trust can address that as well, for example by giving the resident child the right to buy the home from the trust on stated terms. Those provisions have to be in place before the parent dies. They cannot be added during the administration.
This is also a conversation parents should have with their children directly. Which child, if any, actually wants to live in the house? Is that child prepared to carry it? How do the others feel about one sibling receiving the home? The tax rules now push families toward an answer, and the answer is better chosen by the parents, with the children in the room, than discovered by the children after the funeral.
The deadlines are short and unforgiving
The family home exclusion is not automatic. The child has to move in within one year of the transfer, and there is no exception to that requirement. The child must file the homeowners' exemption claim within one year to receive the exclusion from the date of the transfer; a later filing gets the exclusion only going forward. The claim for the exclusion itself (Form BOE-19-P) must be filed with the county assessor within three years of the transfer, and before the property is transferred to anyone else.
For property that passes through a trust, the date of the transfer is the date of death, not the date the trustee eventually deeds the property out. That matters, because trust administrations often take longer than a year, and a child who waits for the formal distribution before moving in can lose the exclusion while the trustee is still working. The successor trustee needs to know these deadlines from the first week, which is one more reason the choice of successor trustee deserves the attention we have written about before.
What parents over 55 can still do
Proposition 19 was not entirely a loss for property owners. It also expanded the rules for homeowners who are 55 or older, severely disabled, or whose homes were destroyed in a wildfire or natural disaster.
Those owners can sell their principal residence and transfer its assessed value to a replacement residence anywhere in California, up to three times in their lifetime, as long as the replacement is purchased or built within two years of the sale. If the replacement costs more than the home that was sold, part of the difference is added to the transferred value, but the owner still keeps most of the benefit. Before 2021, this was a one-time benefit limited to equal-or-lesser value homes and to the counties that chose to participate.
For older parents who are thinking about downsizing, moving closer to their children, or moving to a single-story home, that change can make a move financially sensible that would not have been before. It also interacts with the estate plan: a parent who sells the family home and moves to a replacement home with a transferred base has a new family home, and the parent-child exclusion analysis starts over with that property.
What about repeal?
Proposition 19 has been unpopular with the families it affects, and there have been several efforts to reverse its parent-child provisions, including a proposed initiative that was cleared for signature gathering in late 2025. None of them is on the November 2026 ballot. Repeal may come up again, and if it does we will revisit plans accordingly, but no family should wait for it. The rules described here are the law, and they will apply to any transfer that happens under them.
How I approach it
When a client's plan includes California real property, I now treat Proposition 19 as a standing part of the analysis, not a footnote. The work usually comes down to a handful of steps.
First, we inventory each property with its current assessed value, its estimated market value, and how and when it was acquired, because all three drive the outcome. Second, we run the numbers on what each property will cost the children to own after it passes, under the rules as they are, so the family can see the real figure rather than the one they are used to. Third, for the family home, we talk about which child (if any) will live there, and draft the trust so that the house can be allocated to that child without a reassessment of the siblings' shares. Fourth, for rental and commercial property, we decide whether the children are likely to hold or sell, and whether an entity structure is worth its cost given how the property was acquired. And finally, we make sure the successor trustee has the deadlines in writing, because a plan that is right on paper can still fail on a missed one-year filing.
Most families do not need anything exotic. They need a plan that reflects the rules that will actually apply, children who know what to expect, and a trustee who knows what to file and when.
If your estate plan was signed before 2021, or you own California property you expect to leave to your children, it is worth an hour to see what Proposition 19 does to your numbers. We would be glad to schedule a consultation.
This article is general information, not legal or tax advice, and does not create an attorney-client relationship. Property tax outcomes depend on your specific facts, the county assessor's determinations, and current California law; please consult a qualified professional before acting.
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