Every buyer underwriting a Los Angeles senior living acquisition eventually reaches for the same lever: structure the deal as a purchase of the operating entity rather than the real estate, and the seller's decades-old property tax basis rides along for the buyer's benefit. It is a reasonable instinct, since healthcare real estate deals get structured around entities all the time to keep a license in place, preserve a Medicare or Medicaid provider agreement, or avoid a change-of-ownership survey delay. It is also wrong under California law, and the correction usually shows up as a supplemental tax bill months after closing instead of a line item the buyer priced into the letter of intent.
California does not care what the deal is called. It cares who ends up in control.
Buying the entity does not buy around Prop 13
The general rule sounds like good news. Under Revenue and Taxation Code Section 64(a), the purchase or transfer of ownership interests in a legal entity, whether that is corporate stock, partnership interests, or LLC membership units, does not by itself count as a change in ownership of the real property that entity holds. Buy 20 percent of the company that owns a community and the county assessor leaves the property alone.
The exceptions are where senior living deals live. Section 64(c) treats a change in control as a change in ownership of every parcel the entity owns. Control means acquiring, directly or indirectly, more than 50 percent of the voting stock of a corporation, more than 50 percent of the capital and profits interest in a partnership or LLC, or more than 50 percent of any other entity's total ownership interest. Almost every acquisition of a senior living operating company crosses that line, because almost nobody buys a minority stake in a facility they intend to run. Once control changes hands, every California property the entity and its subsidiaries hold gets reassessed to fair market value as of that date, according to the State Board of Equalization's own guidance on change-in-control transfers.
There is a second, narrower trigger under Section 64(d) for entities with what the BOE calls original co-owners, typically the case when real property moved into an LLC years earlier under the proportional-interest exclusion. If those original owners cumulatively transfer more than 50 percent of their interests over time, only the property that was previously excluded from reassessment comes back into play, unless that same transfer also happens to hand someone control of the entity, in which case the full reassessment applies, not just the previously excluded portion.
For a buyer modeling post-close net operating income on the seller's existing property tax line, the practical result is the same whichever section applies: the number in the seller's most recent tax bill disappears the day control changes, and it gets replaced by a bill calculated on the purchase price.
Deal structure and what it actually buys a California senior living purchaser:
| Structure | What happens to property tax basis |
|---|---|
| Direct real estate purchase | Reassessed to purchase price as of close, per standard change-of-ownership rules |
| Purchase of more than 50% of the operating entity | Reassessed to fair market value as of the date control changes, per Section 64(c) |
| Purchase of 50% or less of the entity, no control acquired | No reassessment triggered by this transfer alone |
| Cumulative transfers by original co-owners exceeding 50% over time | Previously excluded property reassessed, unless the transfer also creates a change in control, in which case all property is reassessed |
The only row that avoids a reset is the one almost no operator-buyer actually wants, since staying under 50 percent means someone else keeps control of the community.
Why this costs more in today's Los Angeles market
This would be a footnote in a slow market. It is not a slow market.
Los Angeles led every metro in the country for active adult occupancy in the first quarter of 2026, hitting 97.2 percent, ahead of Virginia Beach at 96.2 percent and San Diego at 95.1 percent, according to NIC MAP's primary market data. That kind of occupancy tightness is exactly the condition that pulls institutional buyers into a market and pushes them toward paying up for stabilized assets, which is what has been happening across the senior housing sector nationally. Cap rates in NIC MAP's primary markets averaged 6.2 percent through year-end 2025, the tightest spread to the 10-year Treasury in years against a long-term average spread more than twice that size. CBRE's senior housing investor survey conducted in April 2026 found cap rates continuing to compress across every segment of the sector, a signal of rising, not cooling, investor confidence.
Southern California is getting its share of that capital. In April 2026, Investcorp closed a $200 million, three-property portfolio it described as spanning the Los Angeles and New York metro areas, including a 148-unit senior living community in Orange County running at 94 percent occupancy at the end of 2025. In August 2026, American Healthcare REIT disclosed agreements to acquire eight communities from Kensington Senior Living for $873 million, including $56.5 million of Kensington's existing agency debt, two of the eight communities located in the Los Angeles metro area, with the deal expected to close after August 31, 2026. That single portfolio purchase followed $1.4 billion in senior living acquisitions and investments the REIT had already completed earlier in the same year.
When buyers are competing this hard for occupied, cash-flowing communities, the temptation to preserve the seller's low tax basis through entity structuring gets stronger, not weaker, because every basis point of NOI matters more when the going-in cap rate is already tight. That is precisely when the miscalculation is most expensive, since a buyer who underwrote the deal assuming the seller's property tax bill would carry over is modeling a return that the reassessment erases within a year of closing.
The 90-day filing window that catches careful buyers too
The reassessment itself is not the only trap. California requires the entity that underwent a change in control or change in ownership to file Form BOE-100-B with the Board of Equalization within 90 days of the transaction, regardless of whether the transfer ultimately turns out to be excluded from reassessment. Missing that window carries a penalty equal to 10 percent of the tax applicable to the new base year value, a cost that lands on top of whatever the reassessment itself produces.
Buyers who assume an exclusion applies, and skip the filing because they believe no reassessment is coming, still owe the form. The penalty attaches to the failure to file, not to the outcome of the reassessment analysis.
Measure ULA sits on top, not instead
For communities located within the City of Los Angeles specifically, there is a separate cost layer to flag early rather than discover at the closing statement. Measure ULA imposes an added city transfer tax on real property sales above a $5 million threshold, with a second, higher tier once the price crosses $10 million. This is a City of Los Angeles ordinance, not a countywide one, so a community in unincorporated LA County or in a separate incorporated city sits outside it while a comparable asset a few miles away inside city limits does not. Confirming jurisdiction early in diligence beats assuming the county assessor's rules are the only tax question on the table.
What to confirm before you sign anything
- Identify whether the acquisition structure gives the buyer more than 50 percent control of the target entity, since that is the trigger, not the label on the purchase agreement.
- Get a realistic estimate of post-close assessed value based on purchase price, not the seller's trailing tax bill, before finalizing the NOI assumptions in the model.
- Confirm the property's jurisdiction, since a City of Los Angeles address carries Measure ULA exposure above the $5 million and $10 million thresholds that a county or other-city address would not.
- Calendar the 90-day BOE-100-B filing deadline the moment the transaction closes, regardless of which side of the exclusion analysis the deal falls on.
FAQ
Does keeping the purchase under 50 percent of the entity avoid reassessment? Yes, a transfer of 50 percent or less generally does not trigger the change-in-control rule on its own, but that also means the buyer has not acquired control of the community, which defeats the purpose for most operator-buyers.
Does the seller's low property tax basis ever transfer to a new owner in a sale? No. Reassessment happens at the date of change in control or change in ownership, and the new base year value is set to fair market value as of that date, with future increases capped at the standard rate going forward.
If the deal is excluded from reassessment, does the buyer still need to file anything? Yes. The BOE-100-B filing is required within 90 days of the transaction whether or not an exclusion ultimately applies, and the penalty for missing that deadline is separate from any reassessment outcome.
A deal structure that looks clever on paper can still leave a buyer or seller exposed to a tax outcome nobody modeled, and the communities changing hands in Los Angeles right now are trading at prices where that exposure matters. Senior Living Investment Brokerage works confidential sell-side and buy-side processes across the senior care continuum, and the first useful step for anyone weighing a Los Angeles transaction is an honest look at what the asset is actually worth once the tax and structuring realities are on the table. Get a Broker's Opinion of Value before the deal structure gets decided for you.
