California Prop 19 Parent-Child Property Tax Transfer (2026)

Proposition 19 fundamentally rewrote how California families inherit a parent's low Prop 13 assessment. Before February 16, 2021, Prop 58 and Prop 193 let parents pass a primary residence of any value plus up to $1 million of assessed value on other property to children without reassessment. Since February 16, 2021, Prop 19 narrowed the exclusion to a primary residence only, capped at $1 million of difference between factored base year value and fair market value (adjusted for inflation), and requires the child to make the home their own primary residence within one year. I'm Brian Cooper, REALTOR(R) at eXp Realty (DRE# 01434286), and I have walked dozens of Ventura County families through this in the last five years. This is the 2026 playbook.

Quick Answer

California Proposition 19, effective for transfers on or after February 16, 2021, narrowed the parent-child property tax exclusion. Under prior law (Prop 58, Rev & Tax Code 63.1), a parent could pass a primary residence of any value to a child without reassessment, plus up to $1 million of assessed value on other property. Under current law (Prop 19, Rev & Tax Code 63.2), only the primary residence qualifies, the child must make it their own primary residence within one year of transfer, and there is a cap: the new taxable value cannot be more than the parent's factored base year value plus $1 million (adjusted for inflation). The 2026 inflation-adjusted cap is $1,044,586.

Translation for a typical Ventura County family: if your parent's Simi Valley home is assessed at $200,000 but worth $1.2 million on the open market, the $1 million spread is under the cap, so if you move in within a year and file BOE-19-P with the County Assessor, you inherit the $200,000 assessment. If you use the same home as a rental, the entire exclusion is lost and the home is reassessed to $1.2 million, which roughly six-times the property tax bill. The single biggest planning mistake I see is people assuming the old Prop 58 rules still apply.

What changed: Prop 58 / 193 vs Prop 19

Prop 58 was approved by California voters in 1986 and codified at Rev & Tax Code 63.1. It excluded from reassessment any transfer of a principal residence between parents and children (no value cap) plus the first $1 million of full cash value of other property. Prop 193 extended the same exclusion to grandparent-grandchild transfers when both parents of the grandchild were deceased. Together they made it easy for a Ventura County family to hold a parent's home for generations at a 1980s assessment.

Prop 19 was approved in November 2020 and went live for transfers on or after February 16, 2021. It is codified at Rev & Tax Code 63.2. Three changes matter. First, only the parent's primary residence qualifies for exclusion. Rental property, second homes, vacation homes, and commercial property no longer qualify at all. Second, the inheriting child must make the home their own primary residence within one year and file a homeowner's exemption. Third, there is a value cap: if fair market value at transfer exceeds the parent's factored base year value by more than $1 million (adjusted for inflation; $1,044,586 in 2026), the excess is reassessed.

The grandparent-grandchild rule survives in narrower form under Rev & Tax Code 63.2, with the same primary residence and value-cap restrictions and the same deceased-parent requirement carried forward from Prop 193.

Who qualifies: the three Prop 19 tests

Three tests have to be satisfied for a parent-child transfer to qualify for the Prop 19 exclusion. Miss any one and the property is fully reassessed to current market value.

Test one: the property has to be the parent's principal residence at the time of transfer. The parent must have filed (or been eligible to file) the homeowner's exemption or the disabled veterans' exemption. A property the parent owned but rented out, kept as a vacation home, or used as a second home doesn't qualify even if the child plans to move in. Death-date status controls.

Test two: the property must become the child's principal residence within one year of the transfer date. The child must file a homeowner's exemption (form BOE-266) and actually occupy the home. The California Department of Tax and Fee Administration looks at voter registration, driver's license, utility bills, and mail forwarding to verify residency. 'Moving in for a few months to qualify' won't survive an audit if the child later moves out.

Test three: the value cap. If the home's fair market value at transfer exceeds the parent's factored base year value by more than $1,044,586 (2026 figure), the excess is added to the new taxable value. The home is not fully reassessed in that case; instead, the new taxable value becomes (factored base year value) plus (fair market value minus factored base year value minus $1,044,586). The math is unfriendly above the cap.

The 2026 exclusion math: $1,044,586

The $1 million cap in Rev & Tax Code 63.2 is adjusted for inflation every two years by the Board of Equalization. The 2023-2024 figure was $1,022,600. The 2025-2026 inflation-adjusted figure published by the BOE is $1,044,586. The figure represents the maximum difference between fair market value at transfer and the parent's factored base year value before any portion of the home gets reassessed.

Factored base year value (FBYV) is the parent's original Prop 13 base value, plus 2% per year (or CPI, whichever is lower) compounded. A home a parent bought in 1992 for $180,000, with the standard 2% annual inflation factor, has a 2026 FBYV of roughly $358,000. If fair market value at transfer is $1.4 million, the FBYV-plus-$1M cap is $1,402,586. The home value is $1.4M, which is under the $1,402,586 cap, so the child inherits the $358,000 assessment with no add-on.

If the same home were worth $1.7 million at transfer, the math runs: $1,700,000 minus $358,000 equals $1,342,000 of spread, which is $297,414 over the $1,044,586 cap. The new taxable value would be $358,000 (FBYV) plus $297,414 (the excess over the cap), equals $655,414. The property tax bill roughly doubles, but the home is not fully reassessed to $1.7M.

This partial-reassessment math is one of the few structural benefits of Prop 19 over a full reassessment. It only applies when the child meets the primary-residence requirement. Miss the residence test and the home is fully reassessed to $1.7M with no cap relief.

Worked example: Simi Valley home, child as primary residence

Here is a real-world Simi Valley example I have walked families through. Parent bought a Wood Ranch home in 1998 for $295,000. The 2026 factored base year value, with standard 2% annual inflation since 1998, is approximately $525,000. Parent dies in March 2026. Fair market value at date of death is $1,200,000.

Child decides to sell their existing Northridge condo, move into the Simi Valley home by November 2026 (within the 12-month window), and file a homeowner's exemption (BOE-266) with the Ventura County Assessor establishing residency. Child also files BOE-19-P claiming the parent-child transfer exclusion.

• FBYV at transfer: ~$525,000
• Fair market value: $1,200,000
• Spread (FMV minus FBYV): $675,000
• 2026 cap: $1,044,586 — spread is under cap
• Child's new taxable value: $525,000 (no add-on)
• Approximate annual property tax (1.1%): ~$5,775
• Annual savings vs. full reassessment: roughly $7,400

Over a ten-year hold, this exclusion saves the child approximately $74,000 in property tax. Over 20 years, factoring in continued Prop 13 inflation limits on the assessment, the savings push past $150,000. The exclusion is one of the most valuable real estate tax benefits California still offers families.

Critical: child has to actually live there. Voter registration, utility bills, driver's license at the property, and a filed homeowner's exemption. The Assessor verifies on audit.

Same home, child uses as a rental: full exclusion lost

Same Wood Ranch home, same $525,000 FBYV, same $1,200,000 FMV at transfer. Child does not move in. Instead, child rents the home out (or holds it as a second home, vacation home, or short-term rental). Result: the parent-child exclusion is lost entirely. The home is reassessed to $1,200,000 fair market value as of the transfer date.

New annual property tax bill at 1.1%: approximately $13,200. Compared to the parent's prior bill of about $5,775, the child is paying $7,425 more per year, every year, plus annual inflation adjustments on the higher base. Over 20 years that compounds to well over $200,000 of additional property tax compared to the primary-residence outcome.

I get the call from clients all the time: 'Can we move in for a few months to qualify, then convert it to a rental?' The answer is no, not safely. The Assessor can and does audit residency claims. If the child moves out within a year or two and the home becomes a rental, the original exclusion can be clawed back retroactively. The intent test plus the objective residency factors (utilities, voter registration, driver's license, tax returns) have to line up.

Practical alternative I've seen work: if the family wants the home as a rental investment, sell it on the open market, take the step-up basis under IRC 1014 (no capital gains on appreciation through date of death), and use the cash to acquire a different rental in the child's name. The lost-exclusion math almost always supports a sale over a Prop-19-failed rental hold.

How to file BOE-19-P: deadlines and procedure

The form is BOE-19-P, 'Claim for Reassessment Exclusion for Transfer Between Parent and Child.' It is filed with the County Assessor in the county where the property is located — Ventura County Assessor at 800 South Victoria Avenue in Ventura for properties in Simi Valley, Thousand Oaks, Moorpark, Camarillo, and the rest of Ventura County. Los Angeles County Assessor handles Porter Ranch, Chatsworth, and Woodland Hills. Each county has its own version of the form but the underlying state form (BOE-19-P) is identical.

The full-exclusion filing deadline is the earlier of three years from the date of transfer OR six months from the date of mailing of a notice of supplemental or escape assessment from the Assessor. Beyond that window the exclusion can still be granted on a prospective basis but the back-tax billings from the transfer date forward will not be refunded. File early — I tell clients to file within 60 days of the transfer.

Documents required: certified death certificate (if death-triggered transfer), copy of the recorded deed transferring title (interspousal, trust distribution deed, or quitclaim from estate), copy of the trust if applicable, BOE-19-P signed by the transferee child, and BOE-266 (homeowner's exemption claim). The Assessor will compare the filing against the parent's prior homeowner's exemption record to confirm the primary-residence test.

Common mistakes that void the exclusion

Five recurring mistakes I see in Ventura County Prop 19 filings. Each one can turn a $200K assessment into a $1.2M assessment overnight.

• Delay past the 1-year occupancy window. Child waits 14 months to move in. Exclusion gone.
• Treating the parent's vacation home or rental as eligible. Only the parent's primary residence qualifies. A rental in Camarillo the parent never lived in does not qualify regardless of who inherits.
• Child moves in but never files BOE-266 homeowner's exemption. The Assessor's records still show no homeowner there and the parent-child claim fails the residency test on audit.
• Multiple children inherit, only one moves in. The exclusion applies only to the proportional interest of the occupying child. If three children inherit equally and only one occupies, only one-third of the home gets the exclusion. The other two-thirds is reassessed.
• Trust mechanics not properly aligned. If the home is in a parent's revocable trust, the trust must distribute the home to the child within a reasonable time, and the child must move in within a year of the parent's death (not within a year of the trust's later distribution). The trust language and the transfer timing both matter.

A sixth less-common mistake: re-titling the home into the child's name during the parent's lifetime under the assumption that this 'starts the clock' or secures the exclusion. It does the opposite. A lifetime transfer is a separate change-of-ownership event with its own analysis, and it can trigger a lifetime gift-tax reporting requirement on Form 709 without the step-up basis benefit at death. Talk to an estate-planning attorney before re-titling during life.

Step-up basis (IRC 1014) interacts with Prop 19

Prop 19 governs property tax assessment. IRC 1014 governs federal income tax basis. They are separate regimes and both apply to the same inherited home.

Under IRC 1014, property acquired from a decedent takes a basis equal to fair market value at the date of death. The parent's original cost basis disappears. If parent bought the home for $295,000 in 1998 and it is worth $1.2 million at death, the child's basis becomes $1.2 million. If the child sells the next year for $1.25 million, capital gain for federal income tax purposes is $50,000, not $955,000. California conforms to IRC 1014 for state income tax purposes.

Combining Prop 19 and IRC 1014: if the child moves in, qualifies for the parent-child exclusion, occupies for two years, and then sells, the child gets (a) the parent's low property tax during the two-year hold and (b) a stepped-up basis of $1.2M minimizing capital gain on sale. If the home sells for $1.3M after two years, federal capital gain is $100K, which is wholly inside the $250K single / $500K married-filing-jointly IRC 121 primary residence exclusion. Zero tax. This is the highest-leverage planning move available to most Ventura County families inheriting a parent's home.

Pairing Prop 19 with IRC 121 capital gains exclusion

IRC 121 is the federal $250,000 single / $500,000 married-filing-jointly capital gains exclusion on the sale of a primary residence. The taxpayer must have owned AND used the property as a principal residence for two of the five years preceding sale. The two years do not have to be consecutive.

A child who inherits a Prop 19-qualified home and moves in immediately starts the IRC 121 use clock. Two years of ownership and use later, the child can sell and exclude up to $250K (single) or $500K (MFJ) of gain from federal income tax. Because of the step-up basis at parent's death, the 'gain' is only the appreciation during the child's two-year hold, which is almost always inside the exclusion limit.

The combined strategy I see work most often in Simi Valley: inherit, move in, file BOE-19-P, file BOE-266, live in the home for 24 months, then sell with zero capital gain tax and the cumulative Prop 19 property tax savings banked. The child uses the proceeds to buy their own primary residence under IRC 121-eligible treatment going forward.

What to do right now if a parent's death is recent

If you are reading this in the first weeks after a parent's death and they owned a California home, here is the order I recommend.

1. Order at least 6 certified death certificates (the County Recorder, Title Company, Assessor, lender, IRS Form 706 if filing, and your estate-planning attorney each need one).
2. Pull the parent's most recent property tax bill and the prior homeowner's exemption filing — confirm the home was the parent's primary residence at death.
3. Have a probate or trust attorney confirm the title-transfer mechanism (revocable trust distribution, probate court order, beneficiary deed, joint tenancy survivorship).
4. Get a date-of-death appraisal from a qualified California appraiser. This locks in (a) the IRC 1014 basis step-up and (b) the FMV for the Prop 19 cap calculation. Cost ~$500-$700 in Ventura County.
5. File BOE-19-P with the County Assessor within 60 days. Attach death certificate, trust pages, and recorded distribution deed.
6. File BOE-266 homeowner's exemption claim when you take occupancy. Move in within 12 months.
7. Update voter registration, driver's license, utility accounts, and tax-return mailing address to the home within 90 days of occupancy.
8. Consult an estate-planning attorney about IRC Form 706 (federal estate tax return) — the 2026 federal estate tax exemption is $13.99M per individual, but a portability election may be valuable even below that.

Frequently Asked Questions

Does Prop 19 apply to property transferred before February 16, 2021?

No. Transfers on or before February 15, 2021, are governed by Prop 58 (or Prop 193 for grandparent-grandchild). Prop 19 applies only to transfers on or after February 16, 2021. The transfer date is the date of change of ownership — typically the parent's date of death for inheritance cases, or the recording date for lifetime gifts.

What's the current Prop 19 exclusion cap for 2026?

The 2025-2026 inflation-adjusted cap published by the California Board of Equalization is $1,044,586. This is the maximum spread between fair market value at transfer and the parent's factored base year value before partial reassessment kicks in. The cap adjusts every two years based on changes in the California House Price Index.

What if my child moves in but then has to move out for a job?

Risk zone. The Assessor can audit residency claims and look at the overall facts: how long the child actually lived there, what address was on driver's license and tax returns, and whether the home was rented out after the move-out. If residency was genuine and the move-out was for a bona fide reason, the exclusion typically survives. If the pattern suggests the move-in was nominal, the exclusion can be revoked retroactively with back-tax billings.

Does Prop 19 cover transfers from a grandparent to a grandchild?

Only when both parents of the grandchild are deceased at the time of transfer, under the same primary-residence and value-cap rules as parent-child transfers. The form is BOE-19-G. Step-grandparents and great-grandparents are not covered.

What if the home is owned by my parent's trust at death?

Trust ownership is fine, but the trust has to distribute the home to the qualifying child within a reasonable time and the child has to occupy within one year. Hold periods inside the trust longer than necessary can complicate the residency window. Coordinate with the trustee and estate attorney.

How does Prop 19 interact with a step-up basis?

Independently. Prop 19 governs California property tax assessment. IRC 1014 governs federal income tax basis. The child gets the step-up basis at parent's date of death regardless of whether they qualify for the Prop 19 exclusion. The two regimes can stack favorably: inherit at stepped-up basis, hold under Prop 19 exclusion, sell two years later inside the IRC 121 capital gains exclusion.

Can I file BOE-19-P late?

Within three years of transfer, the full exclusion is available. After three years, the exclusion is prospective only — past-due supplemental tax bills are not refunded. After receipt of an Assessor's supplemental or escape assessment notice, you have six months to file before the notice becomes final.

Does Prop 19 apply if I'm buying my parent's house from their estate?

Generally no in the way you might hope. A sale at arm's length to a child is a change of ownership and the home gets reassessed to the purchase price. Prop 19 is for inheritance and gift transfers, not for sale transactions where the child pays the estate fair market value.

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• Thousand Oaks Real Estate
• Moorpark Real Estate
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