Yes, Proposition 13 applies to commercial properties in California, and it applies on the same core terms as residential property: the tax rate is capped at 1% of assessed value, the assessed value can rise no more than 2% per year, and the property is reassessed to current market value only when it changes hands or undergoes new construction.1California State Board of Equalization. Information Sheet: How Property Is Assessed for Property Tax Purposes A commercial building bought in 2010 for $2 million may still be assessed well under $3 million today, even if comparable buildings now sell for $5 million. The equal treatment is real. The catches that trip up commercial owners are specific, though, and most of them don’t exist for homeowners.
How the Base Year Value Works
When you buy a commercial property, the county assessor sets its base year value at the purchase price. For properties that haven’t changed hands since Prop 13 took effect in 1978, the base year traces back to the 1975 lien date assessment. From there the figure can only rise by up to 2% per year, tied to the California Consumer Price Index.1California State Board of Equalization. Information Sheet: How Property Is Assessed for Property Tax Purposes
The 1% rate is a constitutional cap, plus whatever voters in the area have approved for bonded indebtedness such as school construction or infrastructure bonds.2Justia Law. California Constitution Article XIII A Section 1 – Tax Limitation In most counties the combined rate lands between 1.1% and 1.25% once those additions are included.
What Triggers Reassessment on a Commercial Property
The 2% ceiling holds until one of two events: a change in ownership or new construction. When either occurs, the affected property or portion gets reassessed to current fair market value and a fresh base year value is set.3State Board of Equalization. Change in Ownership – Frequently Asked Questions For a property held for decades, that reset can mean a jarring tax increase.
Sales and Entity Transfers
A straightforward sale is the obvious trigger. The less obvious one is where most commercial owners get caught. Under California Revenue and Taxation Code Section 64, reassessment is triggered when someone obtains control of more than 50% of the voting stock of a corporation or a majority interest in a partnership, LLC, or other entity that owns the property.4California Legislative Information. California Revenue and Taxation Code RTC 64 The underlying real property gets reassessed even though the deed never moved. This applies whether the shift happens in one transaction or through a series of smaller transfers that cumulatively cross the 50% line.
A separate rule under the same statute covers property originally contributed to an entity without triggering reassessment: if the original contributors later sell off cumulative interests exceeding 50%, the property gets reassessed.4California Legislative Information. California Revenue and Taxation Code RTC 64 Investors trying to structure around reassessment by keeping each transfer at or below 50% should know the assessor tracks cumulative totals.
One narrow exclusion: transferring property into an LLC or partnership solely to change how title is held, without changing proportional ownership, is not a change in ownership. Every owner must hold exactly the same percentage interest in every transferred property both before and after. Mismatched percentages, even by accident, disqualify the exclusion.
New Construction
Adding a wing, building an additional structure, or doing a major renovation that changes the property’s use triggers reassessment of the new work at fair market value. Only the added value gets a fresh base year value. The existing structure keeps its original base year value and the 2% annual cap.5California Board of Equalization. New Construction
Routine maintenance and cosmetic updates generally don’t count. The triggers are additions to land or improvements, major rehabilitation, or conversion to a different use.5California Board of Equalization. New Construction
The 90-Day Filing and the 10% Penalty
When a legal entity that owns California commercial real property undergoes a change in control or change in ownership, someone has to file a BOE-100-B (Statement of Change in Control and Ownership of Legal Entities) with the California State Board of Equalization within 90 days.6California State Board of Equalization. BOE-100-B, Statement of Change in Control and Ownership of Legal Entities Most commercial owners either don’t know about this filing or assume their attorney handled it.
Miss the deadline and the penalty is 10% of the property taxes attributable to the new base year value. It’s added directly to the assessment roll and collected like delinquent property taxes, with its own additional penalties for nonpayment.6California State Board of Equalization. BOE-100-B, Statement of Change in Control and Ownership of Legal Entities On a high-value property, 10% of the new tax liability is not a rounding error.
Supplemental Tax Bills After a Reassessment
A reassessment event doesn’t only change taxes going forward. California issues supplemental bills to capture the difference between the old and new assessed value for the remainder of the current fiscal year. If the change in ownership or new construction occurs between January 1 and May 31, you get two supplemental bills: one for the rest of that fiscal year and one for the entire following fiscal year.7Orange County Assessor. Supplemental Assessment Notices
These bills arrive separately from the regular annual bills, and they usually aren’t covered by escrow or impound accounts. New owners who budget only for the regular bill often see a large supplemental bill show up weeks after closing.
Prop 19 Ended the Parent-Child Exclusion for Commercial Property
Before February 16, 2021, parents could transfer commercial property to their children (and grandparents to grandchildren) with up to $1 million in factored base year value excluded from reassessment under Propositions 58 and 193. Proposition 19 eliminated that exclusion entirely for any property that isn’t the transferor’s principal residence or a family farm.8California State Board of Equalization. Proposition 19
This is the most consequential change to Prop 13’s commercial rules in decades. A parent who passes a commercial building to a child today triggers a full reassessment to current market value. For properties held 30 or 40 years, the resulting tax jump can be large enough to force a sale. Any succession plan built around the old parent-child exclusion needs a fresh look, because for commercial and investment property the safety net is gone.8California State Board of Equalization. Proposition 19
When the Market Drops: Prop 8 Relief
Prop 13 protections work when the market rises. When it falls, Proposition 8 provides the counterpart. If the current market value of your commercial property falls below its factored base year value as of the January 1 lien date, the assessor must enroll the lower market value instead.9California State Board of Equalization. Decline in Value – Proposition 8
Once a property is in decline-in-value status, the assessor reviews it every year and can increase the assessed value by more than 2% annually as values climb back. The assessed value can never exceed the original factored base year value, though, unless a change in ownership or new construction occurs.9California State Board of Equalization. Decline in Value – Proposition 8 Owners who bought near a market peak should check whether the current assessed value exceeds market value, because the assessor doesn’t always catch every decline automatically.
Appealing a Commercial Property Assessment
If you think the assessed value exceeds fair market value, you can file an application with your county’s Assessment Appeals Board. The regular filing window opens July 2 each year and closes either September 15 or December 1, depending on the county. Most California counties use December 1.10California State Board of Equalization. County Assessment Appeals Filing Period
The strongest commercial appeals rely on one or more of three approaches: comparable sales showing similar properties sold for less than your assessed value, an income analysis showing the property’s rental income doesn’t support the number, or a cost approach showing that replacement cost minus depreciation is lower than what the assessor assigned. Build the evidence before the deadline. The board won’t take your word that the assessment is too high.
Could This Change? The Split-Roll Question
Whether Prop 13 should keep applying equally to commercial property has been politically contested for years. In 2020, Proposition 15 asked voters to require commercial and industrial properties to be reassessed at current market value on a rolling basis, while keeping Prop 13 protections intact for residential and agricultural property. The Legislative Analyst’s Office estimated the measure would have generated $8 billion to $12.5 billion per year in additional property taxes from commercial properties.11Legislative Analyst’s Office. Proposition 15 Ballot Analysis
Voters rejected Proposition 15 by roughly 52% to 48%. The idea hasn’t left California politics. For now, commercial properties keep the same base year value system and the same 2% annual cap that residential properties enjoy, but the equal treatment is a policy choice that has faced serious challenges and could face them again.