Proposition 19 · Property Tax · Los Angeles County
How Much Can You Save With Proposition 19 in LA County?
Justin Borges, DRE #01940318 · 11 min read · Updated July 26, 2026
Proposition 19 lets a Los Angeles County homeowner age 55 or older, or someone severely disabled, transfer their existing assessed value to a replacement home anywhere in California, up to three times, instead of being reassessed at full market value. It also raises the parent-child transfer exclusion to $1,044,586 above the home's factored base year value (Board of Equalization Publication 801).
Sources: California State Board of Equalization Publication 801, Proposition 19 Fact Sheet (updated June 2025); California Revenue and Taxation Code Section 69.6; California Constitution Article XIII A (Prop 13).
What You Will Learn
- What Is Proposition 19 and Who Does It Help Save on Property Taxes?
- How Does the Prop 19 Base Year Value Transfer Formula Actually Work?
- How Much Could a Homeowner Actually Save? A Worked Example
- Does Timing Matter? What Is the 105% Rule?
- How Does Proposition 19 Affect an Inherited Home From a Parent?
- How Many Times Can You Use the Base Year Value Transfer?
- Frequently Asked Questions
What Is Proposition 19 and Who Does It Help Save on Property Taxes?
Proposition 19 changed California property tax law in two ways that matter to Los Angeles County homeowners. First, it lets a homeowner 55 or older, or someone severely disabled, carry their existing low assessed value to a replacement home anywhere in California, up to three times, rather than being reassessed at full market value when they downsize or relocate. Second, it raised the parent-child transfer exclusion, though it also narrowed that exclusion to a transferred home that becomes the child's primary residence.
Before Proposition 19 took effect in 2021, an eligible homeowner could only transfer their assessed value once, and typically only within the same county or a small list of reciprocal counties. Both of those restrictions are gone, which is the single biggest reason this benefit is now worth understanding for any Los Angeles County homeowner thinking about a move.
Most longtime owners assume moving means starting their tax bill over at full market value. That assumption is exactly what Proposition 19 was written to remove.
Justin Borges, CA DRE #01940318How Does the Prop 19 Base Year Value Transfer Formula Actually Work?
The transfer formula starts with the homeowner's current factored base year value, the Proposition 13 assessed value their existing home carries after years of the 2 percent annual cap (California Constitution Article XIII A). If the replacement home's market value is equal to or less than the original home's market value, the entire factored base year value transfers over unchanged, with no addition at all.
If the replacement home costs more than the original home, the difference between the two market values is added to the transferred base year value, rather than the replacement home being assessed at its full market value from scratch. That distinction, adding only the difference instead of resetting entirely, is what makes the Los Angeles County savings substantial for a longtime owner with a large gap between their old assessed value and current market value.
How Much Could a Homeowner Actually Save? A Worked Example
The dollar savings depend entirely on the individual homeowner's numbers, so treat the figures below as an illustration of the mechanism, not a typical result. Say a Los Angeles County homeowner's original home carries a factored base year value of $300,000 and has a current market value of $1,200,000. They sell it and buy a replacement home for $1,100,000, which is below the original home's market value.
Without Proposition 19
With Proposition 19
In this illustration, the transfer keeps roughly $8,000 a year off the general 1 percent levy alone, before accounting for voter-approved local debt and assessments that also apply to the assessed value (California Constitution Article XIII A). A homeowner's actual Los Angeles County property tax bill depends on their specific Tax Rate Area, so this example is meant to show how the mechanism works, not to predict any individual result.
Does Timing Matter? What Is the 105% Rule?
Yes, timing changes how much of the replacement home's value transfers without an addition. If a Los Angeles County homeowner purchases the replacement home within the first year after selling the original home, up to 105 percent of the original home's market value transfers with no addition to the assessed value. Any amount above that 105 percent threshold gets added to the transferred taxable value.
| Purchase Timing | Value Cap With No Addition | Amount Above Cap |
|---|---|---|
| Same year as sale, or within year 1 after sale | Up to 105% of original market value | Added to transferred taxable value |
| Within year 2 after sale | Up to 110% of original market value | Added to transferred taxable value |
| Replacement value ≤ original value | No cap needed; full transfer applies | N/A |
A homeowner shopping for a replacement home in Los Angeles County within the first year of selling has slightly more room, up to 105 percent, than one who waits into the second year, where the cap drops to 100 percent above the original value before the second-year 110 percent ceiling applies (Board of Equalization Publication 801).
How Does Proposition 19 Affect an Inherited Home From a Parent?
Proposition 19 also governs the parent-child transfer exclusion, which lets a child inherit a parent's low assessed value on a Los Angeles home rather than being reassessed at market value, up to $1,044,586 above the property's factored base year value through February 15, 2027 (Board of Equalization Publication 801). The catch is that the child must move into the home as their primary residence within one year of the transfer and file for the homeowners' exemption within that same year to receive the exclusion retroactive to the transfer date.
That primary-residence requirement is the biggest change from the pre-2021 rules, which allowed the exclusion on any inherited California property, including a rental the child never intended to live in. A grandparent-grandchild transfer follows the same rules, but only if the grandchild's parents, who would otherwise qualify as the grandparent's children, are deceased.
How Many Times Can You Use the Base Year Value Transfer?
An eligible Los Angeles County homeowner can use the base year value transfer up to 3 times over their lifetime, a significant increase from the single transfer allowed before Proposition 19 (Board of Equalization Publication 801). Each use requires filing form BOE-19-B for an age-55-or-older transfer, BOE-19-D and BOE-19-DC for a disability-based transfer, or BOE-19-V for a disaster or Governor-declared-emergency transfer, with the County Assessor where the replacement property is located.
Disaster and wildfire victims follow the same three-transfer, statewide rules with no age requirement, but the original property must be substantially damaged, meaning more than half of its market or improvement value was diminished by the wildfire or declared disaster.
Frequently Asked Questions
How much can you save with Proposition 19 in LA County?
Proposition 19 lets a homeowner 55 or older, or someone severely disabled, transfer their existing assessed value to a replacement home anywhere in California, up to three times, instead of being reassessed at full market value. The exact dollar savings depends entirely on the gap between a homeowner's current assessed value and the replacement home's market value (Board of Equalization Publication 801).
How many times can you use the Proposition 19 base year value transfer?
Up to 3 times, a significant expansion from the single transfer allowed before Proposition 19 took effect in 2021 (Board of Equalization Publication 801).
Does the replacement home have to be in the same county under Proposition 19?
No. Proposition 19 made the base year value transfer statewide, so a Los Angeles County homeowner can transfer their assessed value to a replacement home anywhere in California, not only within the same county or a handful of reciprocal counties as the pre-2021 rules required.
What is the 105% rule under Proposition 19?
If a homeowner purchases a replacement home within the first year after selling their original home, up to 105 percent of the original home's market value can transfer with no addition to the assessed value. Any amount above that 105 percent threshold is added to the transferred taxable value (Board of Equalization Publication 801).
How does Proposition 19 affect an inherited home from a parent?
Proposition 19 allows a parent-child transfer exclusion of up to $1,044,586 above the property's factored base year value, current through February 15, 2027, but only if the child moves into the home as a primary residence within one year of the transfer and files the required exemption paperwork within that same year (Board of Equalization Publication 801).
Do you need to file anything to get Proposition 19 savings?
Yes. A base year value transfer requires filing form BOE-19-B (age 55+), BOE-19-D and BOE-19-DC (disability), or BOE-19-V (disaster), and a parent-child transfer requires form BOE-19-P, all filed with the County Assessor where the replacement or inherited property is located.
Downsizing, Relocating, or Handling an Inherited LA County Home?
Get a free valuation before you file for a Prop 19 transfer, or join our free webinar built for heirs, executors, and trustees navigating a California estate.
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