When an original Eichler or other mid-century house has belonged to the same owner for decades, its property tax base can be far below its market value. If you are inheriting one, Proposition 19 decides whether you keep your parent's low property tax base or the house is reassessed. For a Prop 19 inherited home, the answer turns on who lives there, how fast you file and how the home's value compares with a cap set by the state.
This guide summarizes the current rules from the California State Board of Equalization, including its August 2026 question-and-answer letter to county assessors, and the situations heirs ask about. It is a starting point for a conversation with your attorney and tax advisor, not a substitute for one.
What changed on February 16, 2021
California voters approved Proposition 19 on November 3, 2020. Starting February 16, 2021, it replaced the older parent-child and grandparent-grandchild exclusions known as Propositions 58 and 193. Those older rules still apply to transfers and deaths on or before February 15, 2021.
The biggest change is scope. Prop 19 keeps an exclusion only for a principal residence (and for qualifying farms, which are outside the scope of this post). It ended the exclusion for other real property, so a rental house or second home passed from a parent to a child does not qualify.
The conditions for keeping your parent's tax base
It was the parent's principal residence. The house must have been eligible for the homeowners' or disabled veterans' exemption because the parent owned and lived in it.
It becomes your principal residence within one year. The Board of Equalization's 2026 guidance says there are no exceptions to this rule.
You file the homeowners' exemption within one year. File form BOE-266 (or the disabled veterans' exemption) with the county assessor within one year of the date of death or transfer.
You file the exclusion claim. For a parent-to-child transfer, that is form BOE-19-P, due within three years of the transfer or before the house is transferred to a third party, whichever comes first. Grandchildren use BOE-19-G, and the exclusion applies only if the grandchild's parents who are children of the grandparent have died.
Someone keeps living there. At least one eligible heir must continue to live in the house as a principal residence to keep the exclusion.
How the $1 million value cap works
Even when every condition is met, Prop 19 protects only part of the value. The excluded amount is the home's factored base year value plus $1 million, an amount the state adjusts every other February 16. For transfers from February 16, 2025 through February 15, 2027, the adjusted amount is $1,044,586. It was $1,000,000 for transfers through February 15, 2023 and $1,022,600 from February 16, 2023 through February 15, 2025. The next adjustment is due February 16, 2027, so check the Board's figure for your transfer date.
If the home's market value on the date of transfer is above that cap, the excess is added to the factored base year value. The Board's own example uses a factored base year value of $300,000 and a market value of $1,500,000. The excluded amount is $1,300,000, the excess is $200,000, and the new taxable value is $500,000.
This is where long-held mid-century houses stand out. A house bought decades ago can have a factored base year value far below its market value. The lower the base, the lower the cap, so more of the market value can spill over into the new taxable value, even when you move in and file on time.
Situations heirs ask about
Several siblings inherit and one moves in
The Board says not every child needs to live in the house. As long as at least one of the children who received it lives there and meets the other requirements, the exclusion should be allowed.
One sibling buys out the others
Timing and paperwork matter here. If a will or trust allows unequal distributions, giving the house to one child may be excluded when its value doesn't exceed that child's share of the whole estate. But if the house is first distributed jointly and one sibling later transfers an interest to another, the Board treats that sibling-to-sibling transfer as a reappraisable event. Talk with the estate's attorney before anyone signs a deed.
The parent lived in a care facility
A parent confined to a hospital or care facility can still be treated as occupying the house if they would live there but for the confinement, intended to return, and the house was not rented to anyone other than an immediate relative.
The heir moves out later
When the house stops being an eligible heir's principal residence, the exclusion is removed. The county then enrolls the market value as of the inheritance date, adjusted for inflation since then. The exclusion can continue only if a different eligible heir moves in within one year.
The house has a Mills Act contract
Some historic houses carry a Mills Act contract that lowers their assessment. For the Prop 19 calculation, the Board says the excluded amount is figured from the adjusted base year value, not the restricted Mills Act value.
If the heirs decide to sell
If no one will live in the house, it will be reassessed, and a sale is often the next step. Two disclosure points are worth knowing. Sales by a fiduciary in the administration of a trust or decedent's estate are exempt from the transfer disclosure statement, except when the trustee is a natural person who is a trustee of a revocable trust and a former owner or occupant of the property within the past year. Transfers by a fiduciary administering an estate or trust are also exempt from the state's pre-1960 earthquake guide requirement. Other disclosure duties can still apply, so plan the sale with the estate's attorney. Our seller resources cover the rest of the process, and the Eichler renovation guide helps if an heir decides to move in and update the house instead.
A filing timeline for heirs
Right away: get several copies of the death certificate and find the deed or trust documents.
Within one year of the transfer or death: make the house the principal residence of at least one eligible heir and file the homeowners' or disabled veterans' exemption.
Within three years, or before a sale to a third party: file BOE-19-P (or BOE-19-G) with the county assessor.
If a supplemental or escape assessment notice arrives: a claim filed no later than six months after that notice was mailed is treated as timely.
If every deadline has passed and you still own the house: you can still file and receive relief going forward from the lien date of the year you file.
If the occupying heir moves out: notify the assessor.
This is general information as of November 2026, not legal or tax advice. Prop 19 cases depend on deeds, trusts and dates, so check with an estate attorney or tax advisor and with your county assessor before you act. The Board of Equalization's Proposition 19 page lists the current forms and guidance.
Frequently asked questions
Can I keep my parent's tax base if I rent out the inherited house?
No. Under Prop 19, the exclusion covers only a house that was the parent's principal residence and becomes the heir's principal residence. A rental does not qualify, and the house is reassessed.
What is the Prop 19 cap right now?
As of November 2026, for transfers from February 16, 2025 through February 15, 2027, the cap is the factored base year value plus $1,044,586. Any market value above that is added to the taxable value. The amount is adjusted again on February 16, 2027.
My parent died before February 16, 2021. Which rules apply?
Transfers and deaths on or before February 15, 2021 fall under the older Propositions 58 and 193, not Prop 19. Ask your county assessor which claim form applies.
Do all the siblings have to live in the house?
No. At least one eligible child must make it a principal residence within one year and keep living there for the exclusion to continue.
Related reading
Supplemental Property Tax in California: What Home Buyers Should Know
Sell a House As Is in California: Original Mid-Century Homes
Selling a Mid-Century Modern Home: What to Fix and What to Leave
Inheriting a mid-century home and deciding whether to keep it or sell? Call or text the Boyenga Team at (408) 373-1660 or (650) 383-8606, or contact the Boyenga Team to talk through your options.
