Proposition 19 Inheritance Rules: What a Child Must Do to Keep a Parent's Low Tax Base

Under Proposition 19, a child keeps a parent's low property tax base on only one kind of property: the family home, and only if the child moves in and makes it their own principal residence within one year. Everything else the child inherits gets reassessed to current market value. Rentals, vacation homes, second homes, and commercial buildings no longer qualify for any exclusion. These rules govern every parent-to-child and grandparent-to-grandchild transfer completed on or after February 16, 2021.

Key Facts

• A child keeps the parent's low tax base only on a family home the child actually moves into. All other inherited property is reassessed to market value.

• Two conditions must both be met. The property must have been the parent's principal residence, and the child must make it their own principal residence.

• The child has one year from the date of transfer to occupy the home and claim the homeowners' exemption. Miss the year, and the low base is gone for good.

• Rentals, vacation homes, second homes, and commercial property receive no exclusion at all. They are reassessed in full.

• Even a qualifying family home is only partly protected. A value cap triggers a partial reassessment on higher-value homes.

• Grandparent-to-grandchild transfers carry the same move-in conditions, plus the older requirement that the grandchild's parents be deceased.

What Does Proposition 19 Change About Inherited Property?

Proposition 19 narrowed the inheritance benefit from a broad one to a single, specific case.

Under the old rules, covered in Chapter 7, a child could inherit the family home at any value plus $1 million of assessed value in other property per parent, and never live in any of it. A rental stayed a rental with the parent's frozen tax base intact.

Proposition 19 closed that door. Now the low tax base survives only on the family home, and only when the child treats that home as their own. The benefit no longer follows investment property of any kind.

This is the change that catches families off guard most often. They plan around the old rules, assume the low tax bill passes down with the deed, and learn too late that the benefit disappeared because nobody moved in.

What Two Conditions Must an Inherited Family Home Meet?

Both conditions must be satisfied. Missing either one triggers a full reassessment.

The first condition concerns the parent. The property must have been the parent's principal residence, meaning the home the parent actually lived in. A house the parent owned but rented out does not qualify as a family home, no matter who inherits it or how long the family held it.

The second condition concerns the child. The child must make the inherited home their own principal residence. Inheriting it is not enough. Holding it is not enough. Renting it out disqualifies it. The child has to move in, live there, and claim the homeowners' exemption that comes with occupying your own home.

Both conditions point at the same idea. The new benefit protects a real family home passing from one generation living in it to the next generation living in it. It does not protect property held as an investment.

How Long Does a Child Have to Move In?

The child has one year from the date of transfer to occupy the home as a principal residence and claim the homeowners' exemption.

That deadline is strict, and it is easy to miss. The year after a parent dies is usually full of probate, paperwork, and family decisions. An heir who lives in another city, or who has not yet decided what to do with the house, can watch a year slip by without realizing the benefit is draining away.

Once the year passes without the move-in and the filing, the assessor reassesses the home to market value. The low base is lost permanently. There is no extension and no way to reclaim it later.

Treat the one-year mark as a hard deadline running from the date of transfer, which for an inheritance is generally the date of death. If a child intends to keep the family home and its low tax bill, the move and the paperwork should happen early, not eventually. Chapter 13 covers the forms and county filing details.

Which Inherited Properties No Longer Qualify?

The property types that lose the benefit are precisely the ones the old rules covered most generously.

Rentals lose the exclusion entirely. A child who inherits a rental property pays tax on its current market value from the date of transfer. Vacation homes and second homes are treated the same way, with no exclusion and a full reassessment. Commercial buildings, raw land, and other non-residence property fall outside the benefit completely.

Even the family home is not fully protected when it is valuable. A cap limits how much of a high-value home can keep the low base, so a qualifying home above that threshold still faces a partial reassessment. Chapter 9 works through the cap and the arithmetic behind it. Chapter 10 collects the special cases, including family farms and the grandparent rules, in one place.

How Do the Rules Work for Grandchildren?

Grandparent-to-grandchild transfers still exist under Proposition 19, but they now carry every condition that applies to parents and children, plus one more.

The property must have been the grandparent's principal residence. The grandchild must move in and make it their own principal residence within one year, and claim the homeowners' exemption. Those are the same two conditions and the same clock that apply to a parent-to-child transfer.

On top of that, the older requirement survives. The grandchild's parents, the middle generation, must be deceased at the time of the transfer. If the grandchild's parents are living, the exclusion does not apply at all.

A grandchild therefore has to clear both tests: the family condition from the old law and the move-in condition from the new one.

A Worked Example: Two Children, Two Outcomes

Here is how the rules play out with real numbers. A Sacramento parent dies in 2024, leaving two properties to two adult children. The family home has a Proposition 13 assessed value of $120,000 and a market value of $850,000. A rental house across town has an assessed value of $200,000 and a market value of $650,000. Assume a property tax rate of roughly 1.1 percent.

The first child inherits the family home and moves in eight months later, claiming the homeowners' exemption. Both conditions are met inside the one-year window, and the market value sits below the cap. The assessed value stays at $120,000, so the annual tax bill stays near $1,320. Had that child kept their own house across town and rented the inherited home instead, the assessed value would have jumped to $850,000 and the bill to roughly $9,350 a year.

The second child inherits the rental house. There is no move-in option that helps, because a rental was never the parent's principal residence. The property is reassessed to $650,000 on the date of transfer, and the annual tax bill rises from about $2,200 to about $7,150.

Same estate, same parent, two very different tax outcomes. One turned on a decision to move in. The other was fixed by the type of property.

Summary

• Proposition 19 narrowed the inheritance benefit to one case: a family home the child moves into. All other inherited property is reassessed to market value.

• The property must have been the parent's principal residence, and the child must make it their own principal residence.

• The child must occupy the home and claim the homeowners' exemption within one year of the transfer, or the low base is lost permanently.

• Rentals, vacation homes, second homes, and commercial property receive no exclusion and are reassessed in full.

• Even a qualifying family home faces a partial reassessment when its value exceeds the cap covered in Chapter 9.

• Grandparent-to-grandchild transfers carry the same move-in conditions, plus the requirement that the grandchild's parents be deceased.

Get the Full Picture

Read the book. Prop 19 Hero walks through the inheritance rules step by step, including the value cap, the filing deadlines, and the planning moves families can still make before a transfer happens. Find it on Amazon.

Talk to Bart. If you are in the Sacramento area and want to know how these rules affect a home your family expects to inherit, Bart Hubbard can walk you through the situation. Reach out at Prop19Hero.com.

About the Author

Bart Hubbard is a California real estate associate at HomeSmart ICARE Realty (DRE #01815497) and a C.A.R. Certified Probate & Trust Specialist. He wrote Prop 19 Hero to give California homeowners 55 and older a clear, practical guide to the property tax rules that affect every move they make. He works with buyers and sellers throughout the Sacramento area. Reach him at [email protected] or www.prop19hero.com.