California Prop 19 and how it changed parent-child transfers

Last updated 2026-07-10

What is California Prop 19 and when did it take effect?

Proposition 19 is a constitutional amendment California voters approved in November 2020. It took effect in two phases. The parent-child and grandparent-grandchild transfer rules changed on February 16, 2021. The base-year value portability rules for seniors and disaster victims changed on April 1, 2021. ^[1]

The measure replaced two older propositions. Proposition 58 (1986) let parents transfer any property to children without reassessment, up to $1 million in assessed value for non-principal-residence property plus the family home with no dollar cap. Proposition 193 (1996) extended essentially the same rules to grandparent-grandchild transfers. Prop 19 wiped both out and put a much narrower exclusion in their place. ^[2]

If you completed a parent-child transfer before February 16, 2021, the old rules still govern that transaction. The new rules apply to any transfer recorded on or after that date, period. The recording date is what matters. Not the date of a will, trust, or deed of gift.

How did the old parent-child exclusion work under Prop 58?

Under Prop 58, a parent could transfer their principal residence to a child with no reassessment and no dollar cap. The child did not have to live there. They could rent it out, let it sit empty, or flip it a decade later, and it kept the parent's low assessed value the whole time.

For other real property, like rentals, cabins, or commercial buildings, parents could transfer up to $1 million in assessed value (not market value) to children without triggering reassessment. That $1 million limit was per parent, not per property, and it was cumulative across every transfer during a lifetime. ^[2]

In a state where some properties still carry 1975 base-year values, that exclusion was worth a fortune. A beach house assessed at $200,000 but worth $3 million carries annual property taxes of roughly $2,400 instead of $36,000. Multiply that across a rental portfolio and you can see why Prop 19 was fought so hard.

What exactly changed under Prop 19 for parent-child transfers?

The new rule has two hard requirements. First, the child must use the transferred property as their primary residence. Second, the child must file a homeowners' exemption claim (or a disabled veterans' exemption claim) for that property within one year of the transfer date. Miss either one and the property is reassessed at full market value as of the transfer date. ^[3]

Even when the child moves in and files the exemption, the exclusion is now capped. The parent's factored base-year value is compared to the property's current full cash value at the time of transfer. If the market value exceeds the parent's factored base-year value by more than $1,000,000, the child's new assessed value becomes the market value minus $1,000,000. That $1 million adjustment figure is indexed to the California Consumer Price Index and moves each fiscal year. ^[3]

Here is what that looks like with real numbers. Say a parent's home has a factored base-year assessed value of $400,000 and a market value at transfer of $2,500,000. The difference is $2,100,000, which is more than $1,000,000. The child's new assessed value is $2,500,000 minus $1,000,000, or $1,500,000. Still far above $400,000. The child's tax bill jumps hard even though the exclusion technically applied.

Investment properties, vacation homes, second homes, and commercial real estate transferred from parent to child now get reassessed at full market value. No exclusion at all. That is the single biggest change for families holding rentals.

What is the $1 million cap and how is it calculated?

The $1,000,000 figure in Prop 19 is not a cap on the value of the home you can transfer. It is a buffer between the parent's old assessed value and the current market value. Think of it as a discount subtracted from the reassessed value, not an exemption ceiling.

The California State Board of Equalization confirms the $1,000,000 amount adjusts annually for inflation using the California CPI. For fiscal year 2023-24 the Board held that figure at $1,000,000. Families transferring expensive homes in high-cost counties like Los Angeles or Santa Clara will almost always see at least some reassessment even when the child moves in. ^[4]

Here is how the old and new rules treat the same scenarios side by side:

Scenario	Prop 58 result	Prop 19 result
Child lives in home, market value = $900K, base year = $300K	No reassessment, assessed at $300K	No reassessment, assessed at $300K (difference < $1M)
Child lives in home, market value = $2M, base year = $300K	No reassessment, assessed at $300K	Assessed at $2M minus $1M = $1M
Child does NOT live in home, any value	No reassessment up to $1M AV of non-primary properties	Full reassessment at $2M market value
Rental property, market value = $1.5M	No reassessment up to $1M assessed value limit	Full reassessment at $1.5M

If your family's property lands in the bottom half of that table, the tax hit is immediate and large.

Does Prop 19 apply to trusts and inherited property?

Yes, and this is where families get blindsided. The exclusion is triggered by the transfer of ownership, not by the paperwork used to do it. Property that passes through a revocable living trust to a child gets treated the same as a direct deed transfer. The date the trust becomes irrevocable (usually the parent's death) and the child becomes the beneficial owner is the transfer date the assessor uses. ^[5]

Irrevocable trusts set up before February 16, 2021 sit in a murky middle ground. The California State Board of Equalization issued guidance (Letter to Assessors No. 2021-008) explaining that whether an earlier irrevocable trust transfer triggers Prop 19 depends on whether a "change in ownership" occurred before or after the effective date under Revenue and Taxation Code sections 60-68. ^[5]

Entities are their own trap. If a parent transfers a controlling interest in an LLC to a child, that can trigger reassessment under the change-in-ownership rules independent of Prop 19. Get a California tax attorney's opinion before any entity transfer if the underlying real estate carries a low base-year value.

One thing Prop 19 left alone: spousal transfers stay fully excluded from reassessment under Revenue and Taxation Code Section 63. Transfers between spouses at any time, including at death, still avoid reassessment completely. ^[6]

How does a child claim the Prop 19 parent-child exclusion?

The child files a Claim for Reassessment Exclusion for Transfer Between Parent and Child (BOE-19-P) with the county assessor where the property sits. This is a different form from the old BOE-58-AH used under Prop 58. Filing the old form after February 16, 2021 will not protect you. ^[7]

The deadline carries teeth. File within three years of the transfer date and, if the assessor has not yet assessed the property, the exclusion applies from the transfer date with no extra taxes owed. If the assessor already issued a supplemental assessment before the claim is filed, the exclusion only applies from the filing date forward, not retroactively. Waiting costs real money in supplemental taxes you cannot claw back. ^[7]

The child must also file a Homeowners' Exemption (BOE-266) for the same property within one year of the transfer to satisfy the primary-residence requirement in the constitutional text. Filing BOE-19-P alone does nothing if the child never applied for the homeowners' exemption.

In Los Angeles County, both forms go to the LA County Assessor's office, which posts county-specific instructions worth reading before you file. See our deeper breakdown of los angeles county property tax for filing contacts and office locations.

Santa Clara County works the same way, but timing is brutal there given the market values. Our article on santa clara property tax covers the local assessor's procedures.

What happens if the child does not move in within one year?

The property gets reassessed at its full market value as of the transfer date. The assessor issues a supplemental assessment for the difference between the parent's factored base-year value and the new market-value assessment. That supplemental bill covers the period from the transfer date to the end of the fiscal year, prorated.

There is no cure once the one-year window closes. If the child moves in on day 366, the exclusion is gone. The assessor will not grant it retroactively because the child eventually got around to establishing residency.

Move in within the year and then convert the property to a rental later, and the exclusion does not keep protecting it from reassessment on a future sale. Some practitioners warn that vacating shortly after claiming the exclusion could invite an audit of whether the primary-residence requirement was ever genuinely met. The Board of Equalization has not issued formal guidance on a minimum length of residency, so this stays an unsettled area. Nobody has clean data on how aggressively counties pursue it.

How does Prop 19 compare to the old rules for grandparent-grandchild transfers?

Under old Prop 193, grandchildren could receive property from grandparents with the same exclusion that applied to parent-child transfers, but only if both parents of the grandchild were deceased at the time of the transfer. That requirement survives under Prop 19. ^[8]

The new grandparent-grandchild exclusion mirrors the parent-child rules exactly. The grandchild must use it as a primary residence, must file the BOE-19-G (Claim for Reassessment Exclusion for Transfer Between Grandparent and Grandchild), and the $1 million buffer cap applies the same way. The form and the one-year residency deadline work identically.

The fallout hits blended families and families where only one parent died. If one parent of the grandchild is still living, the grandparent-grandchild exclusion does not apply at all. The property gets fully reassessed.

Can a trust be structured to avoid Prop 19 reassessment?

After February 16, 2021, the honest answer for most families is no. The window to set up irrevocable trust arrangements that could have preserved the old Prop 58 treatment closed on that date. Trusts created or funded after it are subject to Prop 19.

Some estate planning attorneys explore strategies like installment sales from parent to child (where the child pays fair market value, avoiding a gift transfer that triggers reassessment) or long-term leases. These are not property tax exclusion strategies. They are ways to avoid a change in ownership entirely. Each one drags in gift tax, income tax, and financial complexity far past a simple transfer, so talk to a California-licensed estate attorney and a CPA before you go anywhere near them.

Family LLCs where the parent keeps a majority interest and gradually hands membership units to children can delay full reassessment if structured carefully under Revenue and Taxation Code Section 64. The Legislature has scrutinized these arrangements, and county assessors apply the "legal entity" ownership-change rules inconsistently. Nothing in current law flatly bans them, but they are complicated.

Honest read: if the goal is parking a rental property at a low assessed value for the next generation, Prop 19 largely shut that door. The one tool left standing is the primary-residence exclusion, and it only helps if the child actually wants to live there.

What if the assessment after a Prop 19 transfer looks wrong?

Even under Prop 19, the assessor has to use the correct market value as of the transfer date. If you think the county overvalued the property, appeal. California property owners have the right to appeal to the county Assessment Appeals Board under Revenue and Taxation Code Section 1603. The typical deadline for a supplemental assessment is 60 days from the notice date. Regular roll assessments generally open July 2 and close November 30 in most counties, though deadlines vary. ^[9]

An appeal won't restore the old base-year value. It can knock down the new assessed value if the assessor's market estimate is too high. Comparable sales from around the transfer date are your best evidence. Pull sales of similar homes within six months of the transfer, adjust for size and condition, and lay them out for the appeals board.

This is exactly the spot where doing it yourself beats handing a contingency firm a cut of your savings. TaxFightBack's appeal kit walks you through pulling comps, filling out the appeal form, and presenting your case to the board.

If you own property in Los Angeles County, the LA County Assessment Appeals Board is separate from the assessor's office and runs its own filing procedures. See our full guide to la county property tax for the specifics.

Are there any planning steps families should still take before a transfer?

A handful of moves still matter even with the broad Prop 58 shelter gone.

Get an appraisal dated near the transfer date. If the property changes hands at or close to fair market value (as in an installment sale), there may be no reassessment event at all. If it is a gift, a documented appraisal gives you a baseline to challenge the assessor's number if they overshoot.

File the BOE-19-P immediately. Do not sit around waiting to see what the assessor does. Filing early protects the exclusion date. File within three years before the assessor acts and the exclusion runs from day one of the transfer.

Confirm the child qualifies for the homeowners' exemption before you transfer anything. A child who already owns a home elsewhere and claims a homeowners' exemption on it cannot claim two at once. They would have to give up the other one and actually move into the transferred property.

Document the child's change of address heavily: driver's license, voter registration, bank statements, and utility bills all pointing at the transferred property's address. If the assessor audits the primary-residence claim, that paperwork is your defense.

For families with big portfolios deciding which property to hand a child who will actually live there, pick the one where the market value minus the parent's base year sits closest to or below $1,000,000. Then the whole exclusion applies and there is no partial reassessment.

What does Prop 19 mean for property taxes in high-cost California counties?

In counties like Los Angeles, Santa Clara, San Francisco, San Mateo, and Marin, almost every home owned for more than a decade blows past the $1 million buffer cap. The California Legislative Analyst's Office estimated during the campaign that Prop 19 would raise property tax revenue by tens of millions of dollars per year in the near term, growing over time, largely from losing the non-primary-residence exclusion and capping the primary-residence one. ^[10]

Take a San Jose family with a home assessed at $200,000 but worth $2.5 million. Transfer it to a child who moves in and the child's new assessed value is $1.5 million, not $200,000. At California's 1% base rate plus local bonds and assessments (typically a 1.1% to 1.3% effective rate across Silicon Valley), the annual tax bill jumps from roughly $2,200 to $16,500 or more. ^[11]

That is a genuine shock for families who planned to pass wealth to children as a low-tax home. The result is that many families are now weighing whether a child should inherit a property at all if they can't or won't live in it, versus selling and splitting the cash.

Our guide to santa clara property tax covers the effective tax rates and assessment methodology in one of the counties where Prop 19 hit hardest.

Frequently asked questions

Does Prop 19 apply to property transferred before February 16, 2021?

No. The new parent-child transfer rules apply only to transfers recorded on or after February 16, 2021. If the deed was recorded before that date, the old Prop 58 rules govern the transaction entirely, even if the estate or probate stayed open afterward. The recording date at the county recorder's office is the controlling date.

Can a child inherit a rental property and keep the low assessed value under Prop 19?

No. Rental properties, vacation homes, and any property the child will not use as a primary residence get fully reassessed at market value as of the transfer date. The Prop 19 exclusion is available only when the child actually moves in and files a homeowners' exemption within one year. There is no exclusion at all for non-primary-residence property after February 16, 2021.

What form do I file to claim the Prop 19 parent-child exclusion?

File BOE-19-P (Claim for Reassessment Exclusion for Transfer Between Parent and Child) with the county assessor where the property is located. This replaced the old BOE-58-AH form. You also need to file BOE-266 (Homeowners' Exemption) for the same property within one year of the transfer to meet the primary-residence requirement.

Is there a deadline to file the Prop 19 exclusion claim?

You have three years from the transfer date to file BOE-19-P. Filing late costs you: if the assessor already issued a supplemental assessment before you file, the exclusion applies only from the filing date forward, not the transfer date. You owe the supplemental taxes for the gap period with no way to recover them. File as soon as the transfer is complete.

Does the $1 million cap under Prop 19 adjust for inflation?

Yes. The $1,000,000 figure that buffers the child's new assessed value against the parent's base-year value is indexed to the California Consumer Price Index and adjusted each fiscal year by the State Board of Equalization. For fiscal year 2023-24 it stayed at $1,000,000. Future adjustments get published by the Board annually.

What happens if the transferring parent is still alive during the transfer?

The Prop 19 exclusion applies to transfers from a living parent to a child just as it does to transfers at death. The child still must use the property as a primary residence within one year and file both BOE-19-P and the homeowners' exemption. A gift during the parent's lifetime rather than an inheritance does not change the analysis.

Does Prop 19 affect co-owned properties where one co-owner is not a child of the transferor?

Only the portion transferred to an eligible child qualifies for the exclusion. If a parent transfers equal shares to one child and one non-child (say a grandchild whose parents are still living, or an unrelated party), only the child's share may qualify. The co-owner's share is assessed at market value proportionally. File the exclusion claim showing the qualifying percentage.

How does Prop 19 treat property inherited through a will vs. a living trust?

The legal vehicle does not matter; the change in ownership date does. For a will, that is typically the date the court order distributing the property is recorded. For a revocable living trust, it is when the trust becomes irrevocable (usually the parent's death) and the child becomes the beneficial owner. Both fall under the same Prop 19 rules and the same one-year residency clock.

Can the child sell the property after claiming the Prop 19 exclusion?

Yes. Once the child receives the exclusion and establishes it as their primary residence, they can sell later. On sale, the property gets reassessed at the sale price for the buyer; it does not carry the old base-year value forward. The exclusion benefits the child while they own it. It is not a permanent low assessed value transferable to third-party buyers.

If I think the assessor's market value after a Prop 19 transfer is too high, can I appeal?

Yes. File a timely appeal with your county's Assessment Appeals Board. For supplemental assessments, you typically have 60 days from the notice date. Gather comparable sales from around the transfer date and present them as evidence. Winning won't restore the old base-year value, but it can lower the new assessed value if the assessor overestimated the property's worth.

Does Prop 19 affect the base-year value portability rules for seniors moving within California?

Yes, and here Prop 19 expanded benefits. Seniors 55 and older, severely disabled persons, and disaster victims can now transfer their base-year value to a replacement home anywhere in California, up to three times (previously once, within the same or a limited set of counties). This portability rule took effect April 1, 2021, separate from the parent-child transfer changes.

Are transfers between siblings excluded from reassessment under Prop 19?

No. Prop 19 covers only parent-child and grandparent-grandchild (when both parents are deceased) transfers. Sibling-to-sibling transfers have never had a similar exclusion in California and get fully reassessed at market value regardless of Prop 19. If a parent transfers equally to two children, each child's share qualifies independently under that child's own primary-residence status.

What records does the assessor review to verify that a child is using the property as a primary residence?

Assessors typically look at driver's license address, voter registration, homeowners' exemption records, and utility bills. Some counties cross-check whether the child claims a homeowners' exemption elsewhere in California. If you are audited, having all four of those documents showing the property address from within one year of the transfer date is your strongest protection.

Sources

1. California State Board of Equalization, Proposition 19 Overview: Prop 19 parent-child transfer rules effective February 16, 2021; senior portability rules effective April 1, 2021
2. California State Board of Equalization, Propositions 58 and 193 (parent-child and grandparent-grandchild exclusions, superseded): Prop 58 allowed transfer of a principal residence with no dollar cap plus $1 million in assessed value of other property; Prop 193 extended similar rules to grandparent-grandchild transfers
3. California Revenue and Taxation Code Section 63.2 (Prop 19 parent-child exclusion), California Legislative Information: Child must use property as primary residence and file for homeowners' exemption within one year; exclusion capped so assessed value = market value minus $1,000,000 when market value exceeds base year by more than $1,000,000
4. California State Board of Equalization, Letter to Assessors No. 2021-027 (Prop 19 implementation guidance): $1,000,000 exclusion amount is adjusted annually by California CPI
5. California State Board of Equalization, Letter to Assessors No. 2021-008: Guidance on whether irrevocable trusts established before February 16, 2021 trigger Prop 19 under Revenue and Taxation Code sections 60-68
6. California Revenue and Taxation Code Section 63 (Spouse/Registered Domestic Partner Exclusion), California Legislative Information: Transfers between spouses and registered domestic partners are fully excluded from reassessment; Prop 19 did not change this
7. California State Board of Equalization, Property Tax Forms (BOE-19-P and BOE-266): Child files BOE-19-P with the county assessor and BOE-266 homeowners' exemption within one year; three-year filing window with retroactive relief only if the assessor has not yet acted
8. California Revenue and Taxation Code Section 63.2 (grandparent-grandchild transfers), California Legislative Information: Grandparent-grandchild exclusion applies only when both parents of the grandchild are deceased at the time of transfer
9. California Revenue and Taxation Code Section 1603, California Legislative Information: Property owners have the right to appeal assessed value to the county Assessment Appeals Board; supplemental assessment appeal deadline is typically 60 days from notice
10. California Legislative Analyst's Office, Proposition 19 Fiscal Analysis (November 2020): Prop 19 estimated to increase property tax revenue by tens of millions of dollars annually in the near term, growing over time, due to loss of non-primary-residence exclusion and cap on primary-residence exclusion
11. California State Board of Equalization, Publication 29: California Property Tax: An Overview: California base property tax rate is 1% of assessed value under Prop 13; local voter-approved bonds add to effective rate, typically reaching 1.1%-1.3% in many jurisdictions