How to Avoid Property Tax Reassessment in California

To avoid a property tax reassessment in California, you need to structure the transfer or the construction so it fits one of the exclusions written into Proposition 13 and the statutes built on top of it. The short list: transfers between spouses or registered domestic partners, transfers into a revocable living trust, qualifying parent-child or grandparent-grandchild transfers under Proposition 19, changes to joint tenancy that keep an original co-owner on title, proportional transfers to a legal entity, and certain kinds of new construction such as seismic retrofitting and solar. Each has its own rules, and none of them apply automatically. You have to claim them, on the right form, by the deadline.

What Actually Triggers a Reassessment

Only two things force the county assessor to set a new base year value: a change in ownership, or new construction.¹

A change in ownership is any transfer of a present beneficial interest in the property — sale, gift, inheritance, or a restructuring of how title is held. When it happens, the property is revalued at current market price and your Proposition 13 protection resets.

New construction is any addition, alteration, or improvement that adds value. The assessor doesn’t revalue the whole property; the new value gets added to what you already have. Everything below is about staying out of both categories.

Transfers Between Spouses and Registered Domestic Partners

Any transfer of real property between spouses or registered domestic partners is excluded from reassessment.² Adding a spouse to title, removing one in a divorce, transferring through a settlement agreement, inheriting from a deceased spouse — none of it triggers a new valuation. The vesting doesn’t matter either. Joint tenants, tenants in common, community property, and community property with right of survivorship all qualify.³

One practical point: note the spousal or domestic partner relationship on the change of ownership statement you file with the deed. If the assessor doesn’t see it, the transfer can get flagged and reassessed before anyone catches the mistake.

Parent-Child and Grandparent-Grandchild Transfers

Before Proposition 19 took effect in February 2021, parents could pass almost any property to their children without reassessment. The current rules are much narrower. Under Revenue and Taxation Code section 63.2, a parent-child transfer avoids reassessment only if both of these are true:

The property was the parent’s principal residence at the time of the transfer.
The child makes it their own principal residence within one year.

The same rules apply to family farms, and to grandparent-to-grandchild transfers — but a grandparent transfer works only if the grandchild’s parent (the grandparent’s child) is deceased at the time.⁴⁵

There is also a value cap. Even when a transfer qualifies, the exclusion protects only the property’s factored base year value plus an inflation-adjusted amount. For transfers occurring between February 16, 2025 and February 15, 2027, that adjustment is $1,044,586. If the property’s fair market value exceeds the sum of the factored base year value and that figure, the overage gets added to the new assessed value.⁴

The residence requirement is what trips most families up. The transferee must file for the homeowners’ exemption or the disabled veterans’ exemption within one year of the transfer. If the child plans to rent the house out or use it as a second home, the exclusion doesn’t apply and the property gets reassessed at full market value.

Moving Property Into a Revocable Living Trust

Transferring your property into a revocable living trust is not a change in ownership, so it does not trigger reassessment, provided you (the trustor) remain a beneficiary or the trust stays revocable.² Transferring back out to the original trustor is also excluded. That is why the revocable trust is the standard California estate planning tool — it lets you skip probate without waking up the assessor.

Irrevocable trusts are different. The transfer avoids reassessment only if the trustor stays the present beneficiary and the interests of the other beneficiaries don’t exceed 12 years. Once you give up your beneficial interest, the assessor treats it as a change in ownership.

Adding or Removing a Joint Tenant

Changes to joint tenancy do not trigger reassessment as long as at least one of the original joint tenants stays on title.² The reassessment only comes when the last original co-owner transfers their interest. That makes joint tenancy a way to bring a child, partner, or other person onto title without an immediate tax hit — though the eventual transfer of the original owner’s share will still trigger reassessment unless another exclusion applies at that point.

Transfers Involving an LLC, Partnership, or Corporation

Putting property into a business entity can trigger reassessment, and this is where do-it-yourself planning tends to go wrong. California tracks these through its Legal Entity Ownership Program (LEOP).

The Proportional Interest Rule

A transfer between an individual and a legal entity avoids reassessment only if it results solely in a change in how title is held and every person’s proportional ownership stays identical before and after.⁶ Two owners each holding 50% of a property who transfer it into an LLC where they each hold 50% of the membership interests are fine. If the percentages shift at all during the transfer, the exclusion is lost.

The 50% Change-in-Control Trigger

Even after a clean proportional transfer into the entity, the assessor keeps watching. If the original owners cumulatively transfer more than 50% of the ownership interests in that entity, the property is reassessed as of the date the transfers cross the 50% line.⁷ This can happen in one deal or a series of smaller ones over years.

Affiliated corporate groups connected by 100% voting stock through a common parent have a separate exclusion for reorganizations and inter-member transfers. That one is limited to corporations; it doesn’t cover LLCs or partnerships.

Carrying Your Base Year Value to a New Home

If you’re moving rather than transferring within the family, Proposition 19 lets you take your existing base year value with you — but only if you fit one of three categories: age 55 or older, severely disabled, or the victim of a wildfire or natural disaster. You can use this benefit up to three times over your lifetime, and the replacement home can be anywhere in California.⁴

The timing rule: you have two years from the sale of the original home to buy or complete construction of the replacement.

The value rule: if the replacement costs the same or less than the original’s market value, your old base year value transfers with no adjustment. The definition of “equal or lesser value” includes a small buffer that depends on when you buy relative to the sale:

Purchase before the sale: up to 100% of the original’s market value.
Purchase in the first year after the sale: up to 105%.
Purchase in the second year after the sale: up to 110%.

If the replacement costs more than those thresholds, you still get the transfer, but the difference between the replacement’s market value and the adjusted original value is added to your transferred base year value. You’ll pay more than at the old house, but far less than a stranger buying the new one.

Use form BOE-19-B for age 55+, BOE-19-D with a BOE-19-DC certificate of disability for the severely disabled, and BOE-19-V for disaster victims. File with the assessor in the county where the replacement home is located, within three years of purchase or completion of construction.⁸

New Construction That Doesn’t Count

A kitchen remodel that adds square footage will be assessed. Several other categories of work will not.

Routine maintenance and repair. Replacing a roof with the same type, repainting, fixing plumbing — upkeep that preserves existing value rather than creating new value isn’t new construction.

Seismic retrofitting. Structural strengthening, bracing parapets, and other work to make a building safer in an earthquake is excluded, whether it’s done to comply with a local ordinance or voluntarily.⁹ Unrelated work bundled into the same project — finish upgrades, extra electrical beyond what the retrofit needs — is not covered.

Disability accessibility modifications. Ramps, widened doorways, grab bars, accessible bathrooms, and similar changes made to accommodate a disabled person are excluded.

Fire safety systems. Sprinklers, smoke detectors, and similar fire protection equipment don’t trigger reassessment.

Active solar energy systems. Rooftop solar and similar systems are excluded. The legislature has extended this exclusion multiple times.

Don’t Accidentally Trigger Your Mortgage

Several of the moves above — transferring into a trust, adding a spouse, inheriting a home — raise a separate problem. Most mortgages contain a due-on-sale clause that lets the lender demand full repayment when the property is transferred. Federal law, the Garn-St. Germain Act, overrides those clauses for several common family and estate planning transfers. Your lender cannot accelerate the loan for:¹⁰

A transfer into a living trust where the borrower stays a beneficiary and occupancy doesn’t change.
A transfer to a spouse or children of the borrower.
A transfer on death by will, intestacy, or operation of law (including a surviving joint tenant taking title).
A transfer to the borrower’s spouse in a divorce or legal separation.

These protections apply to loans secured by residential property with fewer than five units. For larger multifamily or commercial property, the due-on-sale clause may still be enforceable, so review your loan documents before you record anything.

Filing the Paperwork That Secures the Exclusion

None of these exclusions happen on their own. You claim them, and missing the paperwork can cost you the benefit permanently.

The Preliminary Change of Ownership Report

Whenever property changes hands, the new owner files a Preliminary Change of Ownership Report (PCOR), form BOE-502-A, with the county recorder along with the deed.¹¹ The form asks about the nature of the transfer, the relationship between the parties, and whether an exclusion applies. Skipping the PCOR at recording can cost you a $20 fee and force you to file a separate Change in Ownership Statement (BOE-502-AH) later.

Claim Forms for Specific Exclusions

The PCOR alone doesn’t secure a specific exclusion. You also file the matching claim form with the county assessor (not the recorder):

Parent-child transfer: BOE-19-P, within three years of the transfer date or before the property is sold to a third party, whichever comes first.⁴
Base year value transfer, age 55+: BOE-19-B, within three years of purchasing the replacement home.
Base year value transfer, severely disabled: BOE-19-D with BOE-19-DC.
Base year value transfer, disaster victim: BOE-19-V.

For parent-child transfers, there’s a backup deadline: if you miss the three-year window, you can still file within six months of receiving a supplemental or escape assessment notice triggered by the transfer.¹² Late filers may face a processing fee that timely filers avoid.

For a base year value transfer, filing late doesn’t disqualify you, but the benefit only starts from the year you actually file. Any tax you overpaid in the years you missed stays paid.⁸

The forms are available from the California Board of Equalization or your local county assessor. A reassessment on a home with decades of Proposition 13 protection can mean thousands of additional dollars every year for as long as you own it, which makes on-time filing the single most valuable step in the process.

1
California State Board of Equalization. How Property Is Assessed for Property Tax Purposes
2
California Legislative Information. California Revenue and Taxation Code 62
3
SF.gov. Learn About Tax Savings on Interspousal Transfers
4
California State Board of Equalization. Proposition 19 – Board of Equalization
5
California State Board of Equalization. Proposition 19 Fact Sheet
6
California State Board of Equalization. Legal Entity Ownership Program – Exclusions
7
California Legislative Information. California Revenue and Taxation Code 64
8
California State Board of Equalization. Claim for Transfer of Base Year Value to Replacement Primary Residence for Persons at Least Age 55 Years
9
California State Board of Equalization. New Construction Exclusion – Seismic Retrofitting Improvements
10
Office of the Law Revision Counsel. 12 US Code 1701j-3 – Preemption of Due-on-Sale Prohibitions
11
California State Board of Equalization. Change in Ownership – Frequently Asked Questions
12
SF.gov. Claim for Reassessment Exclusion for Transfer Between Parent and Child Occurring on or After February 16, 2021