Prop 19 & Inherited Property Taxes in California

Prop 19 is essentially the law that governs what happens to property taxes when a child inherits property from a parent. When someone passes away and their home transfers to a child, that property would normally be reassessed at current market value — which in California usually means a dramatically higher tax bill. Prop 19 allows the child, if they want to keep the house and use it as their primary residence, to file an exemption with the county so that the property taxes stay at the rate the parents were paying. That's the core of how Prop 19 inherited property taxes work in California.

Absolutely — and it's one of the most valuable things families can take advantage of. Here's how it works. Say your parents bought their home 40 years ago for $50,000. Today it's worth $1,000,000. Their cost basis — what they originally paid — is $50,000, so the appreciation is $950,000. If they were to sell the house themselves, a single person has a $250,000 capital gains exclusion and a married couple has $500,000. So they'd still owe capital gains tax on a significant portion of that gain.

But when a child inherits that same house, the cost basis steps up to the fair market value at the date of death. So if the house is worth $1,000,000 when the parent dies and the child sells it shortly after for $1,000,000, there's no capital gains tax at all. That step-up in basis is one of the most powerful wealth transfer tools available, and most people don't fully appreciate it until they're in the middle of an estate situation.

The child must move into the inherited property and establish it as their primary residence within one year of the date of death. That's the window. If they miss it, they lose the exemption entirely and the property gets reassessed at current market value. In the Bay Area and Sonoma County, where homes have appreciated dramatically, that reassessment can mean tens of thousands of dollars a year in additional property taxes — permanently.

Exactly. From the date of death. Not from the date probate closes, not from when the deed transfers — from the date of death. People sometimes assume they have more time because the legal process is still moving. They don't.

That's where it gets more complicated. Let's say three children are equal beneficiaries, and only one of them wants to keep the house and live in it. That child can file for the exemption — but only on their one-third share of the property. The other two-thirds will be reassessed at current market value. It's a partial benefit, which is still meaningful, but it's not the full protection you'd get if only one child were inheriting.

That's right. And that's where financing comes into play. There are specialized lenders — some I know through our professional networks — who do what you might call a Prop 19 bridge loan or trust loan. A loan is taken out by the irrevocable trust, and the beneficiary who wants to keep the house has to be in a position to get their own mortgage or have sufficient funds to pay that loan off within one year. If they can do that, they're able to claim a full exemption on 100% of the property.

Exactly. It's a specialized process, and you really need an attorney who understands how it works and a lender who has done these types of loans before. Done correctly, it's a powerful tool. Done incorrectly, you've missed your window.

Plan now, not later. A few things to think through with your estate attorney: First, who inherits, and do they actually want to live in the home? If no child plans to use it as a primary residence, the exemption won't apply anyway — so that changes your strategy entirely. Second, don't gift the property while you're alive if preserving the step-up in basis matters to your family. A gift transfers your basis; an inheritance steps it up. And third, make sure your trust or will is current and reflects how Prop 19 actually works. A lot of older estate plans were written under the prior rules, and they may not serve your family the way you intend.

That's exactly right. The savings from Prop 19 inherited property taxes — keeping a parent's assessed value — can easily be worth hundreds of thousands of dollars over time in a state where real estate values are this high. But you have to act, and act within the deadline. Get proper legal and financial representation before transferring any property. The cost of professional advice is minimal compared to the tax exposure you're managing.