Usually, unless you move in. Under Proposition 19, an inherited home keeps your parent’s Prop 13 tax base only if it becomes your principal residence and you file the homeowners’ exemption within one year. Even then, market value above the parent’s factored base plus $1,044,586 is added to the base. A home you rent out or leave vacant is reassessed to market value as of the date of inheritance.
This is the part that blindsides heirs. Proposition 19 (Cal. Rev. & Tax. Code §63.2, effective Feb 16, 2021) replaced the old unlimited parent-child exclusion. To keep your parents’ low Prop 13 base-year value, the home has to become your primary residence, and you file two forms with the county assessor. The homeowners’ exemption (Form BOE-266) is due within one year of the date of death or transfer. If you file it later, the exclusion is applied only going forward, not back to the date of death. The exclusion claim itself (Form BOE-19-P) is due within three years of the transfer, or before the home is transferred to a third party, whichever comes first. For a home held in a living trust, the transfer date is usually the date of death, when the trust becomes irrevocable, so a long probate or trust administration can use up the first year before you realize it. See the Board of Equalization’s Prop 19 filing checklist.
You also have to keep living there. At least one eligible child must continue to live in the home as a principal residence. If several children inherit it together, only one of them has to move in and claim the exemption. If the last one moves out, the home gets a new taxable value as of the next lien date: its market value on the date you inherited it, adjusted each year for inflation. (Source: BOE Prop 19 FAQs, parent-child questions 2 and 3.)
If you don’t move in, the county reassesses the home to today’s market value, and the low base year is erased entirely. In the Bay Area that’s brutal: a home a parent bought in the 1980s for ~$150,000 (property tax ~$1,800/yr) reassessed at a $1.5M market value jumps to roughly $18,000/yr, and on higher-value homes, $30,000+/yr. The new value is set as of the date of death, which is the date of the change in ownership.
Even if you do move in, the protection is capped. The limit is the parent’s factored base year value plus $1,044,586, the figure for transfers from February 16, 2025 through February 15, 2027. The Board of Equalization adjusts that amount every two years, so a new figure applies to transfers on or after February 16, 2027. Any market value above the limit is added to the base. BOE’s own example, scaled to today’s figure: a home with a $300,000 factored base and a $1,500,000 market value has a limit of $1,344,586, so $155,414 is added and the new taxable base is $455,414. (Source: BOE Proposition 19.) Your county assessor sets the exact number; find yours in the BOE county assessor directory, or go straight to Contra Costa, Alameda or Santa Clara. *Illustrative figures; your county assessor and a tax advisor have the exact numbers.