How Prop 19's parent-child transfer rules determine when an inherited California home gets reassessed

Proposition 19 fundamentally rewrote California's tax rules for inherited homes when it took effect on February 16, 2021. The new law replaced Proposition 58, which allowed parents to transfer property to children without reassessment almost regardless of value. Under Prop 19, that's no longer automatic. The rules are tighter, the paperwork deadlines are strict, and exceeding a value cap triggers a partial tax bill on the excess.

For Californians inheriting or planning to gift a family home, understanding Prop 19 means the difference between keeping a parent's property tax basis or watching the assessed value jump to today's market price.

The primary residence requirement changed everything

Under the old rule, a parent could transfer any family property to a child tax-free if the parent lived in it, regardless of what the child did with it afterward. A parent could give a child a vacation home, a rental property, or raw land—all protected from reassessment.

Prop 19 eliminated that flexibility. The law now requires that a transferred property "is the principal residence of the transferor and becomes the principal residence of the transferee." Both requirements must be met: the parent must currently live there, and the child must move in and establish it as their primary home within one year of inheriting it.

This reshapes inheritance strategy. If a parent wants to leave a vacation home, a rental property, or land to a child, Prop 19 offers no reassessment protection. The property gets reassessed at its current market value, which can mean a substantial jump in property taxes. Children who inherit but do not move into the home face the same outcome.

Multiple heirs follow a different rule. If several children inherit a house together, only one needs to move in and establish it as their primary residence—and file for the homeowners' or disabled veterans' exemption within one year of the transfer—for the exclusion to apply, as long as all other requirements are met. If that sibling later moves out, the exclusion continues only if another sibling moves in and files for the exemption within one year of the move-out date.

The $1 million cap replaced unlimited transfers

Proposition 58 had no ceiling: a parent could transfer a home worth $3 million, $5 million, or any amount, and if the parent lived there, the child got full reassessment protection regardless of whether the child moved in.

Prop 19 introduces a hard cap. The exclusion applies only to the property's "factored base year value plus $1 million." The $1 million figure adjusts for inflation every two years. For transfers occurring from February 16, 2025, through February 15, 2027, the cap is $1,044,586.

Here's what that means in practice. Suppose a parent's home has a factored base year value (the assessed value used for property tax purposes) of $800,000. The child can inherit it without reassessment as long as the current market value doesn't exceed $800,000 plus $1,044,586, or $1,844,586. If the home's market value is $2 million, the excess $155,414 gets added to the taxable base. The child pays property tax on both the original base value and that excess going forward.

The cap matters most in high-value markets. A parent might have bought a property decades ago for $300,000, built $100,000 of improvements, and watched it climb to $2.5 million. The child inherits a base year value of perhaps $400,000. With the 2025–27 cap of $1,044,586, the exclusion protects value up to $1,444,586, and the market excess of $1,055,414 gets added to the base, bringing the child's new taxable value to $1,455,414.

Other real property no longer transfers tax-free

Proposition 58 allowed a parent to transfer not just the primary residence, but also up to $1 million worth of other real property—a second parcel, a rental, farmland, or a commercial building—all tax-free.

Prop 19 eliminates exclusion for other real property. If a parent owns farmland, a vacation cabin, or a commercial building they want to leave to a child, Prop 19 offers no reassessment protection. The property is reassessed at its current market value.

Siblings cannot use Prop 19 to transfer property to each other at all. The exclusion applies only to parent-to-child and child-to-parent transfers. It covers biological children, adopted children, stepchildren, and in-laws.

Family farms follow a different standard. A family farm qualifies for the exclusion if it is under cultivation or used for pasture, grazing, or producing an agricultural commodity—there's no requirement that a home be on the property, unlike the rule for inherited houses.

Filing deadlines are strict and non-negotiable

Inheriting under Prop 19 requires two forms and two separate filing windows.

Within one year of the transfer, the child must file a homeowners' exemption claim or disabled veterans' exemption claim with the county assessor. It's a separate filing from the Prop 19 claim itself.

The child must also file Form BOE-19-P, the official parent-child exclusion claim, within three years of the transfer date, or before selling the property to a third party, whichever comes first. If a child inherits in 2026 but sells the home in 2027 before filing the BOE-19-P claim, the exclusion is lost. Counties publish the form and instructions on their websites.

Missing the three-year deadline doesn't necessarily end the matter: a claim filed within six months of the county assessor's supplemental or escape assessment notice is still considered timely, and even after that, a late claim can still secure the exclusion as long as the child still owns the property—though relief then applies only from the year the claim is filed, not retroactively to the transfer date. Selling the property to a third party before filing does foreclose the exclusion.

Prop 19 does not undo prior transfers

The new law applies only to transfers occurring on or after February 16, 2021. Any property transferred under Proposition 58 before that date remains protected under the old, more generous rules. A parent who transferred property to a child in 2020 keeps that benefit forever—Prop 19 did not retroactively change those transfers.

This distinction matters for families with older transfers still on the books, and it explains why some inherited properties avoid reassessment while others, transferred after the cutoff, face it.