Property taxes in California do not reset to market value automatically each year. Proposition 13, adopted by California voters in 1978, limits how quickly assessed values rise while a property stays in the same hands. But when ownership changes, that protection generally does not transfer to the new owner. The assessor reassesses the property at its current fair market value, and the tax bill can increase substantially.
Understanding when reassessment is triggered and what exclusions apply are practical concerns for anyone buying, inheriting, or receiving California real property. Knowing how to challenge an incorrect assessment is equally important.
Proposition 13 and the Base Year Value System
Proposition 13, now codified in California Constitution Article XIIIA, limits the property tax rate to 1% of assessed value. It also caps annual increases in assessed value at 2% per year, as long as the property does not change ownership. The assessed value established at the time of purchase or new construction becomes the “base year value.” Over time, a property’s assessed value can fall significantly below its current market value. The California State Board of Equalization publishes guidance on how these rules operate across the state.
When a change in ownership occurs, the assessor establishes a new base year value. That new base year value reflects the property’s fair market value as of the date of the change in ownership. For a property that last sold decades ago, the jump from the old assessed value to the new market-based figure can be significant.
What Triggers a Property Tax Reassessment
Change in Ownership: The General Rule
California Revenue and Taxation Code section 60 defines a change in ownership broadly. It includes most transfers of a present interest in real property, whether by sale, gift, or other conveyance. The assessor generally presides over the change-in-ownership determination for the county. The California Board of Equalization’s Property Taxes Law Guide sets out the statutory framework in detail. When the assessor determines that a change in ownership has occurred, the property is reassessed at current fair market value.
The fair market value used for reassessment is typically the sale price in an arms-length transaction. Where no sale occurred, such as a gift or inheritance, the assessor estimates market value through comparable sales analysis and other appraisal methods.
New Construction
New construction triggers reassessment separately from a change in ownership. When a property owner adds a new structure or substantially renovates an existing one, the new construction component is reassessed at current cost. The existing structure retains its existing base year value. Only the new construction value is added to the assessed roll at current market value.
Transfers Between Legal Entities
Transferring property into or out of a legal entity, such as a corporation, partnership, or LLC, can trigger reassessment. The rules are complex. A transfer to an entity may or may not constitute a change in ownership depending on whether the transferring individuals retain majority ownership interests. Property transfers between entities, or between an entity and its owners, require careful analysis under Revenue and Taxation Code sections 61 through 68.
Key Exclusions from Reassessment
Parent-Child and Grandparent-Grandchild Exclusions (Post-Proposition 19)
Proposition 19, approved by California voters in November 2020 and effective February 16, 2021, significantly narrowed the parent-child and grandparent-grandchild transfer exclusions that previously existed under Proposition 58 and Proposition 193. Under Proposition 19, a transfer of a principal residence between parent and child avoids reassessment only if the child uses the home as their primary residence. Even then, the exclusion applies only to the amount of the assessed value up to the current market value plus $1 million. If the market value exceeds the parent’s assessed value by more than $1 million, the excess is reassessed. The California State Board of Equalization’s Proposition 19 guidance explains the eligibility requirements and deadlines for claiming the exclusion.
Proposition 19 eliminated the prior ability to transfer any property, including rental and investment properties, to children or grandchildren without triggering reassessment. For property other than a primary residence, no parent-child exclusion applies under the post-2021 rules.
Transfers Between Spouses
Revenue and Taxation Code section 63 excludes from reassessment transfers of real property between spouses. This exclusion applies to transfers that occur during marriage or as part of a settlement incident to dissolution of marriage. The California BOE guidance on interspousal transfers addresses common scenarios, including refinancing, adding or removing a spouse from title, and transfers in divorce proceedings.
Transfers to Revocable Trusts
Transferring property to a revocable living trust generally does not trigger reassessment. Revenue and Taxation Code section 62(d) excludes transfers to a revocable trust. The transferor must remain the sole beneficiary during their lifetime for the exclusion to apply. This allows property owners to place real property in a revocable trust for estate planning purposes without resetting the tax base. The exclusion does not extend to transfers that vest irrevocable interests in others.
Registered Domestic Partners
Transfers between registered domestic partners are generally excluded from reassessment under Revenue and Taxation Code section 62(p). The exclusion applies in a manner similar to the interspousal transfer exclusion. California recognizes registered domestic partnerships under Family Code section 297, and the California Secretary of State maintains the registry.
Inheritance and Proposition 19
Under the pre-2021 rules, inherited property could retain the parent’s low assessed value. Proposition 19 changed that significantly. For deaths on or after February 16, 2021, the parent-child exclusion applies only to a primary residence. The $1 million cap described above also applies. Inherited rental properties, vacation homes, and commercial properties are reassessed at current market value upon the parent’s death.
This change has had significant tax consequences for families inheriting income-producing California real estate. The assessed value after inheritance can be substantially higher than what the parent paid in property taxes, affecting the economics of holding the inherited property.
Other Exclusions
Several other exclusions apply in specific circumstances. These include transfers between co-owners that change only the method of holding title without changing the proportional interests (Rev. & Tax. Code § 62(a)(2)), transfers to or from a legal entity where proportional ownership interests are maintained (Rev. & Tax. Code § 62(a)(2)). Exclusions also exist for transfers of base year value when a senior or severely disabled person sells a primary residence and buys a replacement home. Proposition 19 also expanded the portability of base year value for qualifying seniors and disabled persons. The California Board of Equalization publishes a summary of available exclusions with applicable claim forms.
How Reassessment Works in Practice
Notice of Supplemental Assessment
When a change in ownership triggers reassessment, the county assessor issues a Notice of Supplemental Assessment. This notice reflects the difference between the old assessed value and the new market-based assessed value. A supplemental tax bill follows, covering the period from the date of the ownership change to the end of the fiscal year. The California State Board of Equalization’s guide to supplemental assessments explains how supplemental bills are calculated and when they typically arrive.
Supplemental assessments can arrive months after a transaction closes. The amount due depends on the date of the ownership change and the remaining months in the fiscal year. A property purchased in January generates a larger supplemental bill than one purchased in June, since more of the fiscal year remains.
Change in Ownership Statement
Revenue and Taxation Code section 480 requires a buyer or transferee to file a Change in Ownership Statement with the county assessor. The deadline is 45 days after the change in ownership. For transfers of decedents’ property, section 480(b) requires the personal representative or successor to file within 150 days of the date of death. Failure to file timely may result in penalties. The California Board of Equalization provides a standard Change in Ownership Statement (BOE-502-A) and publishes instructions for completing it.
Appealing an Incorrect Reassessment
Filing with the Assessment Appeals Board
A property owner who believes the assessor has incorrectly determined the market value of the property, or has incorrectly determined that a change in ownership occurred, may file an appeal with the county Assessment Appeals Board. The deadline for filing is generally September 15 of the fiscal year in which the assessment was made. Rules vary by county and by the type of assessment. The California State Board of Equalization’s guide to assessment appeals describes the process, filing deadlines, and applicable standards.
The appeals board holds hearings at which the property owner can present evidence of market value. The assessor also presents evidence. The board determines the correct assessed value based on the evidence submitted. If the board reduces the assessed value, the property owner may be entitled to a refund of taxes paid on the excess amount.
Grounds for Appeal
An assessment appeal may challenge the assessor’s valuation of the property, the assessor’s determination that a change in ownership occurred, or the assessor’s application of an exclusion. Each type of challenge involves different evidence and different legal standards.
A challenge to the valuation argues that the market value the assessor used is too high. This typically requires appraisal evidence, comparable sales data, or expert testimony. A challenge to the change-in-ownership determination argues that the transfer does not meet the statutory definition of a change in ownership, or that an exclusion applies. These challenges are more legal in character and may require analysis of the deed, the ownership structure, and the applicable Revenue and Taxation Code provisions.
Refund Claims
If an appeal is not filed timely, a property owner who paid taxes based on an incorrect assessment may still have a refund claim under Revenue and Taxation Code section 5096 et seq. Refund claims have their own deadlines. The California BOE tax refund procedures page describes the process for seeking a refund after paying an incorrectly assessed tax bill.
Property Rights and Reassessment Disputes
Most reassessment disputes involve tax administration issues that property owners address through the appeals board process. However, some disputes raise broader property rights questions.
When an assessor bases a determination on a disputed property interest, the parties may need to resolve the underlying ownership issue first. These disputes can involve easements, contested title transfers, or questions about beneficial ownership. Quiet title actions, easement disputes, and co-ownership disputes can all complicate the reassessment process.
For background on how title disputes and ownership questions are handled in California, see Quiet Title vs. Quitclaim Deed in California: What’s the Difference and How to Force the Sale of a Co-Owned Property in California. Where a prior sale may have involved undisclosed defects affecting the property’s value, the seller’s disclosure obligations are addressed at Can You Sue a Seller for Not Disclosing Property Defects in California?.
In some cases, a reassessment dispute may involve Constitutional property rights arguments. Where a government entity’s characterization of a property interest as triggering reassessment conflicts with the actual nature of the ownership, or where a reassessment effectively penalizes a lawful transfer of property rights, questions arise about the limits of the taxing power.
Kassouni Law’s Constitutional property rights practice covers a broad range of disputes between private property owners and government entities. An overview is at Constitutional Property Rights Attorneys, and the firm’s Los Angeles-area property rights practice is at Los Angeles Property Rights Attorneys.
Questions About Property Rights in California
Property tax reassessment disputes are often managed through the county assessor’s appeals process. Where a reassessment dispute involves a broader property rights question, a disputed title, or a Constitutional issue, Kassouni Law may be able to help. Managing attorney Timothy V. Kassouni has over three decades of experience in California property rights law. His profile is at Timothy V. Kassouni. Call 877-770-7379 or visit kassounilaw.com/contact for a consultation.
Frequently Asked Questions
1. Does every sale of California real property trigger a full reassessment?
Generally, yes. An arms-length sale of real property constitutes a change in ownership under Revenue and Taxation Code section 60 et seq. The assessor reassesses the property at its fair market value as of the date of the sale. The sale price in an arms-length transaction typically serves as the best evidence of market value. Some transfers are excluded from this rule. Interspousal transfers, transfers to revocable trusts, and certain transfers between co-owners that do not change proportional interests may not trigger reassessment. The California Board of Equalization publishes a list of exclusions with the applicable claim forms.
2. How did Proposition 19 change the parent-child inheritance exclusion?
Before February 16, 2021, parents could transfer any California real property to their children without triggering reassessment, regardless of how the child used the property and regardless of the difference in value. Proposition 19 narrowed this significantly. For deaths or transfers occurring on or after February 16, 2021, the exclusion applies only to a primary residence, and only if the child uses it as their own primary residence. Even for primary residences, the exclusion is capped: if the market value exceeds the parent’s assessed value by more than $1 million, the excess is reassessed. Inherited rental properties, vacation homes, and investment properties no longer qualify for the exclusion.
3. Can a property owner appeal a reassessment after a change in ownership?
Yes. A property owner can appeal the assessor’s valuation to the county Assessment Appeals Board. The typical deadline is September 15 of the fiscal year in which the assessment was made, though rules vary by county and by type of assessment. The appeal may challenge the market value the assessor used, the assessor’s determination that a change in ownership occurred, or the assessor’s denial of an exclusion. Successful appeals can result in a lower assessed value and a refund of overpaid taxes. The California State Board of Equalization’s assessment appeals guide explains the process in detail.
4. Does transferring property into an LLC trigger reassessment in California?
It depends on the ownership structure. Transferring property to an LLC or other legal entity may or may not constitute a change in ownership under Revenue and Taxation Code section 64. The key question is whether the transfer results in a change in the proportional ownership interests of the original owners. If the same individuals who owned the property before the transfer collectively retain more than 50% of the entity, reassessment may not be triggered. If the transfer results in a new majority ownership interest, reassessment generally follows. The analysis is fact-specific. Property owners considering entity transfers should consult both legal and tax counsel to evaluate the reassessment implications under the applicable Revenue and Taxation Code provisions.
5. What happens to property taxes when someone inherits California property and sells it quickly?
When a property owner dies, the property experiences a change of ownership on the date of death. Under Proposition 19, the assessor generally reassesses the property at its current market value from that date forward, subject to the primary residence exclusion discussed above. If the heir later sells the property in an arms-length transaction, another change of ownership occurs at the time of sale. The sale price typically establishes a new base year value. The heir may also receive a supplemental tax bill covering the period between the date of death and the sale date.
Federal and California income tax laws, not property tax rules, govern any capital gains consequences from the sale. The tax impact of inheritance and sale depends on the specific facts and available elections. A tax professional familiar with California law can evaluate the situation.
