California Prop 19 Estate Planning: How to Keep Your Family Home's Tax Basis

Proposition 19 fundamentally changed how inherited property is taxed in California. Before Prop 19 took effect in February 2021, parents could transfer any property to their children — primary residence, vacation homes, rental properties — without triggering a property tax reassessment. That broad exclusion is gone.

Now, only the family home qualifies for a limited exclusion, and only if the inheriting child meets strict requirements. Miss the deadline or fail to move in, and the county assessor reassesses the property to current market value. For a home bought decades ago under Prop 13 protections, that can mean property taxes jumping from $1,200/year to $10,000+ overnight.

What Prop 19 Changed

Before Prop 19 (pre-February 2021): Parents could transfer their primary residence plus up to $1 million in assessed value of other properties to children without reassessment. Investment properties, vacation homes, rental units — all excluded.

After Prop 19: Only the parent's primary residence qualifies for the exclusion. And the child must make it their own primary residence within one year of transfer. All other inherited property — rentals, vacation homes, commercial — is fully reassessed to market value.

Even the primary residence exclusion is limited. If the property's market value at transfer exceeds the parent's assessed value by more than $1 million, the excess is added to the assessed value. A parent paying taxes on $200,000 assessed value for a home now worth $1,500,000 would see the child's new assessed value jump to $500,000 ($200,000 + ($1,500,000 - $200,000 - $1,000,000)).

The One-Year Deadline

The inheriting child must:

1. Move into the property as their primary residence
2. File the parent-to-child exclusion claim (Form BOE-19-P) with the county assessor
3. Complete both steps within one year of the transfer date

If the parent dies and the home passes through probate, the transfer date is the date of death. If the home is in a trust, the transfer date is typically the date the trust distributes the property to the child.

Missing this deadline is irrevocable. The county assessor will reassess the property at full market value, and there's no extension or hardship waiver. This single deadline is responsible for more family property losses than any other provision in California estate law.

Planning Strategies for Prop 19

Transfer the Home Through a Trust

A revocable living trust avoids probate, which means the transfer happens faster and more predictably. Probate can take 12-18 months, eating into the one-year deadline and leaving the child scrambling to establish residency while the estate is still being administered.

With a trust, the successor trustee can distribute the property to the beneficiary shortly after death, giving them the full year to move in and file.

Have the Conversation Now

The biggest Prop 19 planning failure isn't legal — it's communication. If your parents plan to leave you the family home, you need to know:

• Is the home in a trust or will it go through probate?
• What is the current assessed value vs. market value?
• Can you realistically move into it within one year?
• What will the property taxes be if you don't qualify for the exclusion?

If the child can't or won't live in the home as their primary residence, the exclusion doesn't apply — and the family needs a different strategy (selling the property, renting it at reassessed tax rates, or transferring it before death with different tax implications).

Consider the Math for Investment Properties

For inherited rental or investment properties, Prop 19 means full reassessment regardless of what the child does. There's no exclusion.

If your parents own rental property with a low Prop 13 basis, the estate plan should account for the post-transfer property tax increase. In some cases, selling the property before death (at the parent's capital gains rate) and leaving the proceeds may be financially better than inheriting the property with reassessed taxes.

The stepped-up cost basis at death eliminates capital gains for the inheriting child, but Prop 19's property tax hit can more than offset that benefit for properties held as investments.

Multiple Children

If multiple children inherit the family home, only the child who moves in can claim the exclusion. The others' shares don't qualify. This creates practical and family-dynamic challenges — one child lives in the home while others hold a non-exclusion interest.

A trust can address this by directing the home specifically to the child who will live in it, with equalizing distributions of other assets to the remaining children.

Filing the Exclusion Claim

Form BOE-19-P is filed with the county assessor's office where the property is located. Required documentation typically includes:

• Proof of the parent-child relationship
• The date of transfer (death certificate or trust distribution document)
• Evidence of the child's primary residence (change of address, voter registration, utility bills)

The form must be filed within three years of the transfer or before a sale to a third party, whichever comes first. But the one-year move-in deadline is separate and absolute — filing the form late is possible, establishing residency late is not.

The Full Framework

The California Basic Estate Planning Kit includes a dedicated Prop 19 compliance checklist that walks through the eligibility requirements, filing process, assessed value calculations, and planning alternatives for properties that don't qualify for the exclusion. It coordinates with the trust planning and property titling sections so nothing falls through the cracks.

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