Prop 19 and Your Property Taxes When You Buy or Sell

Prop 19 California rules changed two separate things about property taxes: how much of a long-held tax base a homeowner 55 or older can carry into a new home, and how property passed down to children gets reassessed. For a homeowner who has owned a home for decades under Proposition 13’s assessment caps, both pieces matter, sometimes at the same time if a move and an inheritance are both on the table.

Proposition 19 passed in November 2020 and took effect in two stages: base year value transfers became available April 1, 2021, and the new rules for inherited property applied to transfers on or after February 16, 2021. As a proposition 19 property tax measure, it has two main pieces. The first lets eligible homeowners carry their existing property tax base to a replacement home anywhere in California. The second narrows an older exclusion that let parents pass property to children without a full reassessment.

Under Proposition 13, a home’s assessed value is generally set at its purchase price and can only increase by a small amount each year, regardless of how much the market value climbs. Over a long ownership period, that creates a wide gap between what a home is actually worth and what it’s taxed on, which is why moving used to come with a real tax penalty even for a homeowner downsizing into a cheaper property.

Before Prop 19, Propositions 60 and 90 let a homeowner 55 or older transfer their tax base once, and only to a replacement home in the same county or in one of a limited number of counties that opted into the reciprocal program. The replacement home also had to be equal or lesser value than the one sold.

Prop 19 removed those restrictions. A qualifying homeowner can now transfer their base year value to a replacement home anywhere in California, can do it up to three times instead of once, and can buy a more expensive replacement home without losing the benefit entirely.

The transfer is available to homeowners 55 or older, severely disabled homeowners, and victims of a wildfire or other qualifying natural disaster. Both the home being sold and the replacement home need to be the owner’s principal residence and eligible for the homeowners’ exemption. The replacement home has to be purchased or newly constructed within two years of selling the original.

If the replacement home costs the same or less than the home sold, the full original tax base transfers over and the tax bill stays essentially the same. If the replacement home costs more, the difference between the sale price of the old home and the purchase price of the new one gets added on top of the old base year value. The result is a blended taxable value that’s still well below the new home’s full market value, even though it’s higher than what the homeowner was paying before.

The second half of Prop 19 is the one that catches more people off guard. Before the measure passed, a parent could transfer a primary residence, plus up to $1 million of assessed value in other property, to a child without triggering a reassessment, regardless of what the child did with it afterward.

Prop 19 narrowed that significantly. The exclusion now only applies if the child moves into the inherited home as their own primary residence within one year of the transfer, and only up to $1 million over the property’s existing taxable value is excluded even then, with that figure adjusted periodically. If the home’s market value at the time of transfer exceeds the taxable value by more than that amount, the excess triggers a partial reassessment. A vacation home, rental property, or a home the child doesn’t move into loses the exclusion entirely and gets reassessed to full market value at the time of inheritance.

For families who inherited property under the old rules and kept it as a rental or second home without a reassessment, this is a meaningful shift, and it’s worth reviewing with a tax professional or the county assessor’s office before assuming an inherited property will keep its existing tax base.

A base year value transfer claim needs to be filed with the county assessor, and while there isn’t a strict deadline to apply, filing promptly avoids paying more than necessary in the meantime, since refunds are generally limited to a set number of years back. For the parent-child exclusion, a claim filed within three years of the transfer date qualifies for the full benefit retroactive to the transfer. A claim filed after three years only gets relief going forward from the filing date, not backdated, which can mean paying reassessed taxes for years that a timely claim would have avoided.

Does Prop 19 apply to property held in a trust?

Generally yes. Property held in a revocable living trust is treated the same as property held individually for Prop 19 purposes, since the trust is a planning tool rather than a change in the underlying ownership. The same base year value transfer and parent-child rules apply.

Can a homeowner combine a Prop 19 transfer with selling to a family member?

The base year value transfer applies to the homeowner’s own move to a new principal residence, regardless of who buys the old home. Whether a separate transfer to a family member also qualifies for the parent-child exclusion depends on that transfer meeting its own requirements independently.

What happens if a replacement home is purchased before the original home sells?

The two-year window runs in either direction, so a replacement home can be purchased before or after the original sells. The base year value transfer still requires the original home to sell within two years of buying the replacement, and the claim gets filed once both transactions are complete.

Property held as tenants in common raises its own set of questions under Prop 19, particularly around how a base year value transfer or the inherited property rules apply when ownership is split between multiple people rather than held individually. That scenario is covered in full in Prop 19 and Tenants in Common: What California Owners Should Know.

A lower transferred tax base helps with the ongoing cost of owning the replacement home, but it doesn’t change what’s needed to actually buy it. A homeowner moving from a long-held, largely or fully paid-off property into a more expensive replacement home still needs to finance the purchase, and timing matters. Buying the replacement home before the original sells can require bridge financing or a specific loan structure that accounts for equity that hasn’t been converted to cash yet, while selling first can mean a tighter window to find and close on a replacement home within Prop 19’s two-year limit.

We work through the financing side of a Prop 19 move regularly, including bridge scenarios where a homeowner needs to buy before an existing property sells, and coordinate timing against the two-year window the base year value transfer requires.

This overview is for general informational purposes and isn’t legal or tax advice. Base year value transfer and parent-child exclusion rules, dollar caps, and filing procedures can change and vary by county, so verifying current figures and deadlines with the county assessor’s office or a tax professional is recommended before filing a claim.

Mike Trejo is the Broker/Owner of Bridgepoint Funding, a residential mortgage brokerage based in Pleasant Hill, California. With more than 20 years of experience in the mortgage industry, Mike has helped thousands of borrowers navigate the home loan process, including many healthcare professionals and travel nurses with non-traditional income profiles.

Mike founded Bridgepoint Funding in 2006 and is consistently ranked among the Top 1% of Mortgage Loan Originators nationwide. Reach out at (925) 478-8630 or visit bpfund.com.