Direct answer
Yes — once a 50% line is crossed. When any one person or entity acquires more than half of the LLC, the home is reassessed at that day's market value, and Form BOE-100-B must be filed with the BOE within 90 days.
Applied to your situation, there are really two 50% lines, and which one governs depends on how the house got into the LLC. If the LLC bought the house directly from a seller and you live in it, only the line above applies (R&T §64(c)). Pass shares to your children or a partner later, and as long as no single person ends up with more than 50%, nothing is reassessed. The day someone crosses half, the entire property takes a new tax base at that day's value. If the house sat in your own name first and you moved it into your LLC in the same proportions, a second line applies as well: once the original owners have transferred more than 50% in total, the property is reassessed — even if no one holds a majority (R&T §64(d)). Two other costs were fixed on the day of purchase. An LLC-held home cannot claim the $7,000 homeowners' exemption, and LLC interests passed to children cannot use Prop 19's parent-child exclusion.
A note on scope. How an LLC trades off privacy, liability protection, and probate avoidance is covered in The One Decision Bay Area Buyers Have to Make Before Escrow. The supplemental bill that arrives a few months after closing is covered in Why Does a Second Property-Tax Bill Arrive Months After Closing?. This article covers one thing: the property-tax costs of holding your own home in an entity, which only surface years later. It is written for decision education and is not legal or tax advice; confirm any execution with your attorney and CPA.
Who this article is for
- Families who hold, or plan to hold, an owner-occupied home of $8M or more all-cash through an LLC, a corporation, or a family-office structure. At this level in Atherton, Los Altos Hills, Palo Alto, and Woodside, all-cash is the norm: according to MK Bay Area Pulse Q3 2026 (MLSListings, three-county single-family closings), 69.4% of the 36 sales between $10M and $20M were all-cash.
- Cross-border families with a BVI or other offshore company sitting above the U.S. LLC, who expect to rebalance that upper-tier ownership among family members in the future.
- Owners whose home is currently held in their own name or a revocable trust, and who are weighing a move into an LLC for liability protection or family governance.
- Families planning to divide LLC interests among their children, bring in a co-investing partner, or set out in a will or trust how LLC interests will pass.
- Heirs, trustees, and family-office principals working through the distribution of LLC interests after a family member's death.
Three questions that decide whether the house is reassessed
One: How the house entered the LLC decides which 50% line applies
In the first case, the LLC buys directly from a seller. The purchase itself is a change in ownership; the house takes its tax base at the sale price, exactly as it would for an individual buyer. From then on, changes in the LLC's membership are governed only by the R&T §64(c) control test. BOE's Legal Entity Ownership Program (LEOP) page puts it this way: "A change in control occurs when a person or entity obtains more than 50 percent of the ownership interest in the entity." For an LLC, that interest is measured by capital and profits. Once triggered, every California property the LLC owns is reassessed at market value on the date control changed.
In the second case, the house was in your own name and you moved it into your own LLC in the same proportions. R&T §62(a)(2) excludes this kind of transfer — one that changes only the form of ownership while each person's share stays the same — so nothing is reassessed at the time. The price is a label. BOE explains that the people who hold the LLC interests immediately after the transfer are treated as "original co-owners," and when "cumulatively more than 50 percent of the original co-owners' total ownership interests" are later transferred, the property that escaped reassessment is reassessed under §64(d). Under the same BOE page and Property Tax Rule 462.180(d)(2), that label stays with the property until it is reassessed or leaves the LLC.
On paper, the two LLCs look identical. Under property-tax rules they are entirely different. So the first question to ask of any LLC structuring proposal is not "is an LLC a good idea," but "did this house come into the LLC by purchase, or by transfer?"
Two: The control test asks who receives; the cumulative test asks who gives up
Section 64(c) looks only at the receiving end: whether any one person or entity ends up with more than 50%. BOE's LEOP page gives a family example. Two brothers are partners; B holds 51% and his brother 49%. B dies and his will leaves 2% to his brother and 49% to his own son. BOE's conclusion is that the brother "obtained control of the partnership on the date of B's death." A 2% inheritance turned a 49% partner into the controlling one, and the partnership's real property was reassessed with it. Conversely, if the interests are spread across three children at one-third each, no one crosses 50%, and there is no change in control. Control can also be indirect: acquiring control of an upper-tier company is acquiring control of the LLC beneath it.
Section 64(d) looks only at the giving end: how much the original co-owners have transferred in total. Take the same equal split among three children and place it in an LLC the house was moved into. The original co-owners have now transferred 100%, and the transfer that crossed 50% triggers reassessment — even though no child holds a majority.
Two exceptions are worth separating. A transfer of LLC interests between spouses is excluded from reassessment under R&T §63 even if one spouse gains control as a result — but it still has to be reported. The second is the risk of staging. In Question 27 of Letter to Assessors No. 2021/008, BOE notes that Prop 19 did not carry over the old law's treatment of step transactions, and that "the step transaction doctrine may be applied to such transfers." A parent-child transfer deliberately broken into several steps so that none crosses half may be treated as one.
Three: Entity ownership gives up two things on the day of purchase
The first is the homeowners' exemption. BOE describes it as a constitutional $7,000 reduction in taxable value for a "qualifying owner-occupied home," available when the home is the owner's principal residence on January 1. Property Tax Annotation 505.0063 states that an LLC is a separate entity for property-tax purposes and that "a claim for exemption should not be allowed for property owned by a limited liability company." Even a single-member LLC that is disregarded for income tax is not you for property tax. At about 1.2%, the exemption is worth roughly $84 a year — trivial in itself. What matters is that it is a precondition for Prop 19's owner-occupancy exclusion; see My Parents Are Leaving Me Their Palo Alto House and I Won't Live In It — How High Does the Property Tax Go?
The second is the larger one: Prop 19's parent-child exclusion. Question 26 of LTA 2021/008 addresses exactly this case — "My parents own their family home in a limited liability company. Can they transfer their membership shares to me and can I take advantage of the exclusion?" The answer is "No"; the exclusion "does not apply to transfers of ownership interests in legal entities." Definition 5 in the same document says the real property in question "does not include any interest in a legal entity." When a family home is held by individuals or a revocable trust and a child moves in within a year, the child can keep the parents' base plus up to $1,044,586 (the inflation-adjusted cap for transfers from 2025-02-16 through 2027-02-15, BOE Letter to Assessors No. 2025/009). When the same house is held by an LLC, the only remaining question is how the LLC's interest-change rules apply.
Three ways to hold, seven events: the property-tax outcome
The short version: take the same move — giving one-third to each of three children. In an LLC that bought the house directly, nothing is reassessed, because no one crosses half. In a home moved from your own name into your own LLC, the property is reassessed, because the original co-owners have transferred 100% in total. In a home held directly by individuals or a revocable trust, each one-third share is reassessed proportionally, unless it qualifies for Prop 19's owner-occupancy exclusion. Only the individual-or-revocable-trust column keeps both the $7,000 homeowners' exemption and the Prop 19 parent-child exclusion.
| Event | Held by individuals or a revocable trust | Bought directly by the LLC | Moved from your own name into your own LLC |
|---|---|---|---|
| At purchase or transfer | Base set at the sale price | Base set at the sale price (the LLC's acquisition is a change in ownership) | No reassessment for a proportional transfer (§62(a)(2)); members become original co-owners |
| Interests passed to children | Transferred shares reassessed proportionally; only a family home a child moves into can claim the Prop 19 exclusion (capped) | No one acquires more than 50%: no reassessment; one child passes 50%: all LLC property reassessed at that day's value | Reassessed once original co-owners cumulatively transfer more than 50%; three children at one-third each also triggers it |
| Bringing in a partner | Share sold to the partner reassessed proportionally | Partner acquires 50% or less: no reassessment; more than 50%: everything reassessed | Transferred share counts toward the cumulative total, reassessed past 50%; if the partner also passes 50%, all LLC property is reassessed |
| Death in the family | Measured at date of death: to a spouse, no reassessment; a family home to a child who moves in within a year can use Prop 19; otherwise reassessed at date-of-death value | Measured at date of death: to a spouse, no reassessment; if any heir acquires more than 50%, everything reassessed | Measured at date of death: to a spouse, no reassessment; shares to children count toward the cumulative total, reassessed past 50% |
| Who you report to | County assessor (change in ownership statement) | BOE, Form BOE-100-B, within 90 days | BOE, Form BOE-100-B, within 90 days |
| $7,000 homeowners' exemption | Yes, including a revocable trust whose trustor lives in the home | No | No, lost on transfer into the LLC |
| Prop 19 parent-child exclusion | Yes, for a family home a child occupies within a year, capped at $1,044,586 | Not available (LLC interests are not real property) | Not available |
What to remember: the middle column is forgiving of an even split and unforgiving of concentration in one person. The right-hand column is the reverse — it does not care who ends up with how much, only how much the original group has given up. Many families move an existing home into an LLC precisely "to make it easier to divide later," and in doing so place themselves in the column most likely to trigger reassessment, while giving up both owner-occupancy benefits only the left-hand column offers.
Reassessment in dollars: a $10M home in year 10 and year 20
The core numbers first. Assume an LLC buys at $10M, the combined rate is about 1.2%, and the base rises at the 2% Prop 13 cap each year. In year 10 the base is about $12.19M and the annual tax about $146,300. If a change in interests reassesses the whole property that year, and market value has grown 5% a year to about $16.29M, the annual tax is about $195,500 — about $49,200 more every year. At 3% a year, it is about $15,000 more.
| Year reassessment is triggered | Prop 13 base (+2%/yr) | Annual tax, not triggered | Value +3%/yr: tax after reassessment | Extra per year | Value +5%/yr: tax after reassessment | Extra per year |
|---|---|---|---|---|---|---|
| Year 10 | ~$12.19M | ~$146,300 | ~$161,300 | ~$15,000 | ~$195,500 | ~$49,200 |
| Year 20 | ~$14.86M | ~$178,300 | ~$216,700 | ~$38,400 | ~$318,400 | ~$140,100 |
What to remember: the longer you hold, the more a reassessment costs. In year 20, under the 5% assumption, one trigger adds about $140,000 a year, and the gap is permanent. The new base starts from that day's market value and rises at most 2% a year from there; it never returns to the old track. The 2% in the table is a ceiling — the actual annual factor follows California CPI and falls below 2% in some years, which makes the real gap wider than shown. Against that, the $7,000 homeowners' exemption an LLC gives up is worth about $84 a year. The two are not in the same order of magnitude.
BOE-100-B: 90 days, 10%, and no time limit on back taxes
A transfer of LLC interests needs no deed and leaves nothing at the county recorder — which is why BOE runs LEOP at all. In BOE's words, these transfers "do not involve a recorded deed or other notice that would inform county assessors," so the person acquiring control, or the LLC that undergoes the change in ownership, must report it. Five rules apply:
- Deadline: file BOE-100-B with the BOE — not the county assessor — within 90 days of the change in control or ownership. If BOE sends a written request, you must file within 90 days of receiving it, whether or not a change actually occurred. BOE states plainly: "The law does not provide for any extensions."
- Excluded transfers still file: an interspousal transfer or any other excluded event must still be reported within 90 days, or the penalty applies.
- Death of a member: the date of death is generally the change date. If the final distribution is not yet settled, file within 90 days of death on known information with an explanation, then file an amended statement within 90 days of the final distribution.
- Penalty: under §482(b), late filing costs 10% of the annual tax on the new base. Using the year-10, 5%-a-year case above, that is about $19,500. Relief must be requested within 60 days of the assessor's notice, from the county board of supervisors (or the assessment appeals board, in counties that have one).
- Back taxes: under BOE LTA 2002/014's reading of §532(b)(3), where the statements required by §480.1 / §480.2 were not filed, escape assessments can cover every year of under-paid tax, outside the usual four-year limit. BOE's main lead comes from the FTB: Question I on the LLC's California return, Form 568 (per the 2025 form), asks whether anyone acquired more than half of the LLC during the year, and whether property contributed under §62(a)(2) has cumulatively been transferred more than half.
What MK Group sees in practice
In May 2026, MK Group closed an all-cash purchase of about $11M in Los Altos Hills, with a corporate entity as the buyer. Rather than advising the client to write an ultra-short closing for speed, the team settled the title structure, the funding path, and the document coordination first, then moved to close, distilling the core issues into three questions: whose name is this bought in, how does the money move, and how will it be held? This article is about where the third question lands on the property-tax bill. The first two get answered before closing, because the bank, escrow, and title force the answer. The third carries no visible cost on closing day, which is exactly why it gets deferred.
In a second transaction worth setting beside it, Marie Wang (DRE# 02110980) and Kevin Mo (DRE# 02127623) took the position that the holding structure had to be decided before the offer went in. That client formed a new LLC held through a BVI company, with the core goal of keeping their name off the public title record (how that kind of privacy structure is built is covered in Buying an Eight-Figure Silicon Valley Estate: How Do I Keep My Name Off the Public Record?). The home leaned toward asset holding rather than long-term family residence. A home held as an asset could never use the homeowners' exemption or Prop 19's owner-occupancy exclusion, so the trade-off was relatively simple. Put the same LLC structure on a home bought to live in and eventually leave to the children, and those two costs have to be counted. Multi-tier holdings carry one general rule as well: a change in ownership of the offshore company above can amount to an indirect change in control of the LLC below.
Purchases made as a family office run into the same question. In a $12M Saratoga purchase handled by MK Group, the client bought as a family office and never once came to the Bay Area to see a home during the process. In transactions like this, the choice of house is settled at purchase. If a family-office entity holds it, how interests later move among family members is the property-tax variable over the holding period — and the part most worth writing into the governance documents at the time of purchase.
Common mistakes
Mistake one: "LLC interest transfers need no deed, so the county will never know"
The county recorder will not know. The BOE will. LEOP exists because entity transfers leave no deed. BOE's main lead is the FTB: Question I on the Form 568 every LLC files each year asks directly whether a change in control occurred, or whether original co-owners cumulatively transferred more than half during the year; a "yes" means BOE-100-B is due. Referrals from county assessors are another source. Missing a filing does not mean "pay this year's difference." Under BOE LTA 2002/014's reading of §532(b)(3), where BOE-100-B was not filed, escape assessments can cover every year of under-paid tax, plus a penalty of 10% of the annual tax on the new base.
Mistake two: "Once the house is in an LLC I own 100%, I can divide the interests any way I like without reassessment"
No reassessment on the way in is correct. No reassessment however you divide it later is not. A proportional transfer is excluded under §62(a)(2), but you become an original co-owner the moment it happens. From then on, however many people you divide it among and however many steps you take, once the original co-owners' cumulative transfers pass 50%, the property that escaped reassessment is reassessed under §64(d). For a family that intends to divide the house among several children, this is precisely the line most likely to be crossed.
Mistake three: "A single-member LLC is disregarded for tax, so for property tax it's the same as owning it myself"
Income tax and property tax are two separate rule sets. Federal and California income tax can treat a single-member LLC as a disregarded entity, but BOE Property Tax Annotation 505.0063 states that for property tax an LLC, like a corporation, is a separate entity that cannot be disregarded — so an LLC-held home cannot claim the homeowners' exemption. Annotation 505.0017 likewise states that a married couple who transfer their home into a corporation they own lose the exemption, even though the transfer itself is excluded from reassessment under §62(a)(2). By the same logic, LLC interests cannot be treated as real property to claim Prop 19's parent-child exclusion.
Mistake four: "Transfer less than 50% at a time and it will never trigger"
Neither line accepts that. Section 64(d) is cumulative by design: however many steps the original co-owners take, the one that crosses 50% triggers it. Section 64(c) asks whether anyone ends up with a majority; acquire interests in several steps until you pass half, and the step that crosses 50% is the change in control. In Question 27 of LTA 2021/008, BOE also makes clear that the step transaction doctrine may be applied to parent-child transfers routed through legal entities, collapsing them into one.
Mistake five: "Transfers between spouses don't trigger reassessment, so there's nothing to file"
Not being reassessed and not having to file are different things. BOE's LEOP guidance says a transfer of LLC interests between spouses or registered domestic partners is excluded from reassessment under §63 even if one gains control — but "Even if an exclusion from reassessment is applicable to a transfer, a legal entity must file form BOE-100-B." It still has to be filed within 90 days, or the §482(b) penalty applies.
Next steps
- Establish which kind of LLC you have. Pull the operating agreement and the membership ledger, and write down each member's current capital and profits percentage. Then confirm whether the LLC bought the house directly or received it from an individual or trust. If the latter, find the transfer deed and the county assessor filing from that time, and confirm who the original co-owners are and what each held.
- Run two numbers before any change in interests. Before a transfer, a capital call, a new partner, or any change to how a will or trust allocates LLC interests, answer two questions: will anyone hold more than 50% afterward, and how much have the original co-owners already transferred in total? Put both answers in the decision record for that change.
- Write the three 90-day clocks into the family documents. Ninety days from a change in control or ownership; ninety days from a written BOE request; ninety days from a member's death (if the distribution is unsettled, file on known information first and amend within 90 days of the final distribution). None of them can be extended, and no one will remind you.
- Calculate your own reassessment gap. Look up the current assessed value by address on the Santa Clara or San Mateo County Assessor website, subtract it from today's market value, and multiply by your tax rate area's combined rate (roughly 1.1%–1.25%). That is what a trigger would add every year — and it tells you whether the structure is worth adjusting for.
- For a home you live in and intend to leave to your children, take these numbers to an estate attorney and a CPA. Put the LLC's liability protection and privacy on one side, and the Prop 19 parent-child exclusion and $7,000 homeowners' exemption available only to individual or revocable-trust ownership on the other — on the same page — before deciding on the structure.