How Does Proposition 19 Affect Transferring a Parent's Property Tax Base to Their Child?

Updated September 2026

Proposition 19 lets a parent transfer their principal residence to a child without full property tax reassessment, but only if the child also uses the home as their own primary residence within one year, and only up to a set dollar amount above the parent's existing assessed value — currently $1,044,586, adjusted every two years for inflation. This is a major change from the prior rules under Proposition 58, which let parents pass up to $1 million of assessed value in any property, including rental homes and vacation properties, without the new owner ever having to live there. Here's how the current rules actually work, what they mean for a family inheriting a home, and what buyers, sellers, and heirs need to know before a Prop 19 transfer becomes part of a real estate transaction.

What Is Proposition 19's Parent-Child Transfer Exclusion?

Proposition 19, effective for transfers on or after February 16, 2021, allows a parent to transfer their principal residence to a child (or a child to transfer to a parent) without triggering a full property tax reassessment to current market value — but only if the child moves into the home and claims it as their own primary residence within one year of the transfer, and files for the homeowners' exemption within that same window. Eligible recipients include biological children, legally adopted children, stepchildren, and in some cases in-laws and foster children. If the child does not move in and claim the home as their primary residence, the property is reassessed at full market value like any other change of ownership, and the family loses the tax basis their parents built up under Proposition 13.

How Does the $1,044,586 Value Limit Work When Transferring a Family Home?

Proposition 19 does not simply preserve the parent's old assessed value forever — it sets a cap on how much the market value can exceed that base value before the excess gets added back in. The California State Board of Equalization adjusts this cap every two years for inflation; for transfers between February 16, 2025 and February 15, 2027, the amount is $1,044,586. Here's how the math works in practice: if a parent's home has a factored base year value of $200,000 but a current fair market value of $1,500,000, the difference is $1,300,000. Since that exceeds the $1,044,586 cap for this period, the excess amount over the cap gets added to the original base year value, and the child's new assessed value becomes roughly $200,000 plus the amount by which the difference exceeded $1,044,586 — meaning the child still gets a substantial tax break, just not a complete pass on the appreciation. If the difference between market value and the parent's base year value is under the cap, the child inherits the exact same assessed value the parent had, with no increase at all.

What Changed Between Proposition 58 and Proposition 19 for Rental and Investment Properties?

Before February 16, 2021, Proposition 58 allowed parents to transfer up to $1 million of assessed value in any real property to their children without reassessment — this covered rental units, vacation homes, and commercial buildings, not just the family home, and the child never had to live in the property to keep the tax break. Proposition 19 eliminated that broader exclusion entirely. Under current law, investment properties, rental properties, second homes, vacation homes, and commercial real estate are fully excluded from the parent-child exclusion — the tax break under Proposition 19 now applies only to a principal residence that the receiving child actually occupies as their own home. A family that owns a rental property or vacation home in addition to their primary residence can no longer pass that second property to their kids at the old assessed value; it gets reassessed to full market value at the time of transfer like any other sale.

Can Grandparents Transfer Property to Grandchildren Under Proposition 19?

Yes, but only under a narrower set of circumstances than a parent-to-child transfer. The grandparent-to-grandchild exclusion is available only when both of the grandchild's parents are deceased — not disclaimed, not estranged, but legally deceased. If even one parent who is a child of the grandparent transferring the property is still living, the exclusion does not apply and the transfer is reassessed at full market value. Beyond that requirement, the same rules apply as a parent-child transfer: the home must have been the grandparent's principal residence, the grandchild must move in and claim it as their own primary residence within one year, and the same $1,044,586 value cap applies for the current two-year cycle.

What Should Buyers, Sellers, and Heirs Know About Prop 19 in a Real Estate Transaction?

Families handling an inherited home have real decisions to make, and the timeline matters. Heirs must file a claim using form BOE-19-P within three years of the transfer to get relief retroactive to the transfer date, though filing within six months of receiving a supplemental assessment notice from the county assessor also preserves the benefit — filing later than that still helps going forward but not retroactively. When multiple siblings inherit a home together, one sibling can move in and claim the primary residence exclusion even if the others do not live there, as long as that sibling files the required homeowners' exemption claim within the one-year window. For agents and buyers, it matters whether a listing was previously held under a Prop 19 exclusion, since a sale to a non-family buyer triggers a normal reassessment to current market value regardless of what the seller's assessed value was — the low tax basis doesn't transfer to an unrelated buyer. Family farms have their own separate set of rules and can qualify for the exclusion even when actively used for commercial agricultural production, and can transfer repeatedly under the same exclusion across generations.

Frequently Asked Questions About Proposition 19 Parent-Child Transfers

Do I have to move into the inherited home to keep my parents' property tax basis?
Yes. Under Proposition 19, you must occupy the home as your own primary residence within one year of the transfer and file for the homeowners' exemption within that same year, or the property is reassessed at full market value.

What happens if the home's market value is far more than $1,044,586 above my parent's assessed value?
You still get a tax break, just a partial one. The amount by which the difference exceeds the current cap gets added to your parent's original factored base year value, rather than the entire market value being used for reassessment.

Can I transfer a rental property or vacation home to my child without reassessment under Prop 19?
No. Since February 16, 2021, the parent-child exclusion applies only to a principal residence that the child will occupy as their own home — rental properties, vacation homes, and commercial real estate are fully excluded from this benefit and get reassessed to market value at transfer.

What form do I need to file, and what is the deadline?
You file form BOE-19-P with your county assessor. Filing within three years of the transfer gets you relief retroactive to the transfer date; filing within six months of a supplemental assessment notice also preserves the benefit.

Sources: California Proposition 19 (effective February 16, 2021) as summarized by county assessor offices including Los Angeles, San Diego, and Santa Cruz Counties; the California State Board of Equalization's Proposition 19 inflation adjustment notice setting the intergenerational transfer exclusion at $1,044,586 for transfers between February 16, 2025 and February 15, 2027; and BOE Publication 800-1 and form BOE-19-P guidance on intergenerational transfer claims, current as of September 2026. This is general information, not legal or tax advice — consult a licensed real estate attorney, estate planning attorney, or CPA for guidance on your specific situation. Andrea Pazmino-Pace, DRE #02013784.