Prop 19 and Inherited Property: Why Your Tax Bill Just Jumped
Many California heirs find out about Proposition 19 the hard way: a supplemental tax bill arrives a few months after a parent passes, and the annual property tax on the family home is suddenly several times what Mom or Dad paid. If you want the basics of inheriting a home first, start with what happens when you inherit a house in Los Angeles. This post goes deeper: the actual math behind the bill, how the cap works on higher-value homes, the forms and deadlines, partial interests, and how trusts change the picture.
The Rule in One Paragraph
Since February 16, 2021, a home passed from parent to child keeps the parent’s low assessed value only if the child makes it their own principal residence. Even then, the protection is capped. For transfers between February 16, 2025 and February 15, 2027, the home can be worth up to the parent’s factored base year value plus $1,044,586 without any increase. Value above that line gets added to the assessed value. Rentals, vacation homes and other non-residence property get no exclusion and are reassessed to full market value. Grandchildren can qualify in some cases when their parent (the grandparent’s child) has died, using a separate form.
The Math, With Real Numbers
The “factored base year value” is the assessed value shown on the parent’s tax bill, which has grown by no more than 2% a year under Prop 13. Here’s how the assessor works from it.
Example 1: Under the cap
A Pasadena house has a factored base year value of $350,000 and is worth $1,200,000 at the date of death. The cap is $350,000 + $1,044,586 = $1,394,586. Because $1,200,000 is below that, the child who moves in keeps the $350,000 assessed value. Nothing changes except the name on the bill.
Example 2: Over the cap
A Sherman Oaks house has a factored base year value of $300,000 and is worth $1,800,000. The cap is $300,000 + $1,044,586 = $1,344,586. The value above the cap is $1,800,000 − $1,344,586 = $455,414. The new assessed value is $300,000 + $455,414 = $755,414.
Example 3: No move-in
Same house, but no child moves in, or it’s kept as a rental. It’s reassessed to the full $1,800,000.
Here is what those three outcomes look like on a tax bill, using an illustrative combined rate of 1.2%. Actual rates in LA County vary by location because of local bonds and assessments, so check the rate on your own bill.
| Scenario | Assessed value | Approx. annual tax at 1.2% |
|---|---|---|
| Parent’s bill | $300,000 | $3,600 |
| Child moves in, over the cap (Example 2) | $755,414 | $9,065 |
| No move-in or rental (Example 3) | $1,800,000 | $21,600 |
That gap of about $12,500 a year between moving in and not moving in is why heirs need to decide early. It is also why holding an inherited home as a rental is often less attractive than it sounds: the rent has to cover a tax bill based on today’s value.
Forms and Deadlines in LA County
All of these are filed with the Los Angeles County Assessor if the property is in LA County.
| Step | Form | Deadline |
|---|---|---|
| Report the change in ownership after death | BOE-502-D | Within 150 days of the date of death, or with the inventory and appraisal if there’s a probate |
| Child moves in as principal residence | None | Within 1 year of the transfer |
| Claim the homeowners’ exemption | BOE-266 | Within 1 year of the transfer |
| Claim the parent-child exclusion | BOE-19-P | Within 3 years of the transfer, and before the property is sold or transferred to a third party |
| Grandparent-grandchild claim | BOE-19-G | Same as BOE-19-P |
For an inheritance, the transfer date is generally the date of death. With a living trust, it’s when the trust becomes irrevocable, which is usually also the date of death.
If you miss the three-year window, you can still file, but relief starts only with the year you file. It isn’t backdated, so the higher taxes for the earlier years stay. Filing is free, and the assessor can’t apply the exclusion if no one asks for it.
When Only Part of the House Qualifies
Partial exclusions come up constantly with siblings. A few patterns:
- One child moves in, others don’t. Assessor guidance indicates the property can qualify as long as it becomes the family home of an eligible child within a year. Siblings who don’t live there aren’t disqualified just for being on title.
- Part goes to a non-child. If a parent leaves 75% to a child and 25% to a niece, the 25% is reassessed to market value. The child’s 75% is measured against the cap.
- A sibling buys the others out. When one child pays siblings for their shares with their own money, those purchased shares are a sibling-to-sibling transfer, which Prop 19 doesn’t protect, so that portion is reassessed.
- The child later moves out. The exclusion lasts only while the home stays the child’s principal residence. Once they move out and no longer qualify for the homeowners’ exemption, the property is reassessed. Temporary absences, like a hospital stay or military deployment, don’t end it.
How Trusts Change the Outcome
Trust wording matters more than most families realize. Under long-standing State Board of Equalization guidance, if the trust gives the trustee power to make non-pro rata distributions, the trustee can give the house to one child and other assets to the others. That child is treated as receiving the house from the parent, not buying it from siblings, as long as the house is worth no more than that child’s share of the whole estate. Anything above that share is treated as coming from siblings and reassessed.
So a trust with $1.8 million in total assets and three children could potentially allocate a $600,000 house entirely to one child without a sibling transfer. A house worth more than that child’s share can’t be fully covered this way. If you’re a successor trustee, read the distribution clause carefully and talk with the estate attorney before deeding anything out, because the way a distribution is structured can decide whether part of the house gets reassessed.
Deciding What to Do
Run three numbers before deciding: the tax if you move in, the tax if you don’t, and what you’d net if you sold. Many families find the move-in option makes sense only for the child who truly wants to live there long-term, because the savings disappear the day they move out. If no one does, selling is common, and the stepped-up basis rules often mean far less capital gains tax than heirs expect. Our post on capital gains on inherited property in California explains how that works.
Whichever way you go, budget for the supplemental tax bills that follow a reassessment. They cover the difference between the old and new values for the rest of the tax year, and they often come due before an inherited house is sold.
If the house is in Los Angeles specifically, here’s how the reassessment interacts with the county’s probate timeline. If it’s in Orange County, we’ve laid out the filing deadline and what else heirs need to know before selling.
Common Questions
Does Prop 19 apply if my parent died before February 16, 2021? No. Transfers before that date fall under the older Prop 58 rules, which were more generous. The date of the transfer controls, not the date you file.
Can I avoid reassessment by keeping the house as a rental? No. Only a family home or family farm can qualify. A rental is reassessed to market value.
Will the $1,044,586 figure change? Yes. It’s adjusted every two years, so the amount that applies depends on the date of transfer.
Weighing a Sale?
If the new tax bill makes keeping the house hard to justify, a no-pressure cash offer can help you compare options. We either buy directly or bring a vetted cash buyer, we work with heirs, trustees and executors, and the house can be sold as-is. Call (424) 435-2326 or request a no-obligation offer online.