How to Avoid Prop 19 Property Tax Reassessment in California

To avoid Prop 19 property tax reassessment in California, you have to fit one of the law’s narrow exclusions and file every required form on time. For an inherited home, the child or grandchild must move in as their principal residence and file the homeowners’ exemption within one year of the transfer, plus a separate exclusion claim within three years. For homeowners age 55 or older, people with severe disabilities, and victims of a Governor-declared disaster, Prop 19 lets you carry your existing tax base to a replacement home anywhere in the state. Miss a deadline or skip a form and the county assessor reassesses the property at current market value.

The Exclusion for Inherited Family Homes

The only way to keep a parent’s or grandparent’s low tax base on a home inherited after February 16, 2021, is the intergenerational transfer exclusion in Revenue and Taxation Code Section 63.2. Four conditions all have to be met:

The property was the transferor’s principal residence before the transfer.
The child or grandchild makes the property their own principal residence within one year of the transfer date.¹
The transferee files for the homeowners’ exemption or disabled veterans’ exemption within one year of the transfer.²
The transferee files the exclusion claim form within three years of the transfer, or before the property is sold to a third party, whichever comes first.³

For a grandparent-to-grandchild transfer, one more condition applies: the grandchild’s parents who are the children of the grandparents must be deceased at the time of the transfer.² A grandparent cannot skip a living child.

The exclusion is not permanent. If the transferee later stops using the property as a principal residence, the county assessor removes the exclusion and enrolls a new base year value.² You cannot inherit, claim the exclusion, live there briefly, then convert the home to a rental and keep the old tax base.

One boundary worth stating plainly: this exclusion only reaches the family home and family farm. Rental properties, second homes, vacant land, and commercial real estate inherited after February 16, 2021, are reassessed to current market value with no exclusion available.²

The Value Cap and How Partial Reassessment Works

Even a qualifying family home can be partially reassessed if it is valuable enough. The exclusion protects value up to the property’s existing factored base year value plus $1,044,586. That allowance is the current figure, effective for transfers from February 16, 2025, through February 15, 2027, and the Board of Equalization recalculates it every two years using the Federal Housing Finance Agency’s House Price Index for California.⁴

Take a home with a factored base year value of $300,000 and a fair market value of $1,500,000. Add the base year value to the allowance: $300,000 + $1,044,586 = $1,344,586. The market value exceeds that sum by $155,414. Add the excess to the old base: $300,000 + $155,414 = $455,414. That becomes the new taxable value.¹ The child still saves a lot compared to full reassessment at $1,500,000, but the bill goes up. If the market value had come in at $1,344,586 or less, the $300,000 base would have transferred with no adjustment.

The Family Farm Exclusion

A family farm transferred between parents and children, or between grandparents and grandchildren under the same deceased-parent condition, can qualify without the child moving in.¹ The land has to be under cultivation, used for pasture or grazing, or used to produce an agricultural commodity.

The value cap applies here too, but per parcel. Each legal parcel making up the farm is treated as a separate farm, and the $1,044,586 allowance applies independently to each one.² If one parcel holds the family home, that parcel can qualify separately under the primary residence exclusion, so a working farm with a residence can end up with two layers of protection.

Transferring Your Tax Base to a New Home

Prop 19 lets certain homeowners sell their current home and carry the old taxable value forward. You qualify if you are 55 or older, severely and permanently disabled, or a victim of a Governor-declared wildfire or natural disaster.⁵ The replacement can be anywhere in California. Both homes must be eligible for the homeowners’ or disabled veterans’ exemption, and you must buy or build the replacement within two years of selling the original.³

Replacement of Equal or Lesser Value

If the replacement costs the same as or less than the original, the old taxable value transfers straight across. What counts as “equal or lesser” tightens over time:

Bought before you sell the original: the replacement’s full cash value cannot exceed 100% of the original’s.
Bought in the first year after the sale: cannot exceed 105%.
Bought in the second year after the sale: cannot exceed 110%.⁵

Replacement That Costs More

You can buy up. The difference in full cash value between the two homes is added to your transferred taxable value.⁵ Say the original had a taxable value of $200,000 and a market value of $800,000, and you replace it with a $1,000,000 home. Your new taxable value is $200,000 plus the $200,000 difference, or $400,000. Still far below tax on the full $1,000,000.

How Many Times

Seniors and severely disabled homeowners can use this transfer up to three times. Victims of wildfire or natural disaster are not subject to the three-transfer cap.³

Transfers That Are Not a Change in Ownership at All

Some transfers do not count as a “change in ownership” under California law and never trigger reassessment, regardless of Prop 19. Knowing which they are helps you avoid creating a tax event by mistake:

Moving property into or out of a revocable living trust where the transferor remains the beneficiary. Standard California estate planning through a revocable trust does not itself trigger reassessment; the Prop 19 question arises only when the trust later distributes the property to a beneficiary after death.⁶
Transfers between spouses or registered domestic partners, including transfers resulting from divorce, under Revenue and Taxation Code Section 63.
Transferring property to an LLC, partnership, or corporation, as long as the original owners keep more than 50% of the ownership interests. Cumulative later transfers that push past 50% reassess all the entity’s real property.⁷

Forms and Deadlines

Every exclusion requires paperwork. The county assessor will not assume you qualify, and doing nothing means reassessment.

Inherited Homes and Farms

For a parent-child transfer, file BOE-19-P (Claim for Reassessment Exclusion for Transfer Between Parent and Child). For a grandparent-grandchild transfer, file BOE-19-G.⁸ Both go to the county assessor where the property sits. The claim itself is due within three years of the transfer or before the property is sold to a third party, whichever happens first.³

Separately, file BOE-266, the Claim for Homeowners’ Property Tax Exemption, within one year of the transfer.⁹ This is the form that proves you actually moved in. The exclusion claim alone is not enough.

Base Year Value Transfers

File one of the following with the assessor in the county where the replacement property is located, within three years of buying or completing construction:⁸

BOE-19-B for homeowners age 55 or older.
BOE-19-D for severely and permanently disabled homeowners, filed with BOE-19-DC, the Certificate of Disability.
BOE-19-V for victims of wildfire or other natural disaster.

What Happens if You Miss a Deadline

The one-year homeowners’ exemption deadline is the one that catches families off guard, especially when a child is dealing with probate and grief at the same time. File the homeowners’ exemption more than a year after the transfer and the exclusion does not apply retroactively. It applies only prospectively from the year you actually file.³ A supplemental tax bill covering the gap period at the reassessed value can follow.

Missing the three-year deadline for the exclusion claim is worse. Fail to file BOE-19-P or BOE-19-G within three years, or transfer the property to a third party before you file, and the exclusion is forfeited entirely.¹ The same three-year window applies to base year value transfer claims.

Challenging a Reassessment After the Fact

If the property has already been reassessed and you think the value is wrong, you can file an Assessment Appeal Application (BOE-305-AH) with the clerk of your county’s Assessment Appeals Board. If you got a supplemental assessment notice because of a change in ownership, you have 60 days from the mailing date on that notice. Without a notice, the 60 days runs from the supplemental tax bill.¹⁰ The board can lower the value, leave it the same, or raise it.

Planning Moves Before the Transfer

The families hit hardest by Prop 19 are the ones who learn the rules after the transfer has already happened. A few decisions made while the parent is still alive shift the outcome:

Sort out which property qualifies. Only the principal residence and any family farm are eligible. If the parent owns multiple properties, the child needs to decide up front whether they are actually prepared to move into the family home. Rental properties, vacation homes, and commercial buildings will be reassessed no matter what.
Use a revocable living trust during the parent’s lifetime. Placing property in the trust is not a change in ownership. The Prop 19 analysis waits until distribution after death.⁶
Start the homeowners’ exemption paperwork the day you take possession. The one-year clock runs from the transfer date, not from when probate closes or title is recorded.
For investment real estate that will be reassessed regardless, some families find it better for the parent to sell during their lifetime, potentially using a 1031 exchange to defer capital gains, rather than passing property to a child who will face both reassessment and the loss of the low tax base.

None of these calls should be made without a tax professional or estate planning attorney who works with California property tax and federal tax together. The right move depends on the family’s specific numbers.

1
California State Board of Equalization. Proposition 19 Fact Sheet
2
California Legislative Information. California Revenue and Taxation Code 63.2
3
California State Board of Equalization. Proposition 19
4
California State Board of Equalization. BOE Adjusts the Proposition 19 Intergenerational Transfer Exclusion Amount
5
California Legislative Information. California Revenue and Taxation Code 69.6
6
California Legislative Information. California Revenue and Taxation Code 62
7
California State Board of Equalization. Rule 462.180 – Change in Ownership – Legal Entities
8
California State Board of Equalization. Property Tax Forms for Use by County Assessors Offices
9
California State Board of Equalization. Homeowners Exemption
10
California State Board of Equalization. Assessment Appeals Frequently Asked Questions