Trust & Estate Litigation

Multiple properties, an LLC, a family business, five siblings, and a trust that says one thing while the deeds say another.

A complex estate case is one where the assets, the entities, or the family make the usual playbook fail: several properties, a business or LLC held in trust, siblings on both sides, and a trust that does not match the deeds. The same Probate Code applies (§§ 850, 17200). The case is won on records, valuation, and control of the assets while it runs.

By Arthur E. Rothrock · Updated September 1, 2026

What makes an estate case complex

The law is the same. What changes is everything the law has to be applied to.

A simple trust contest has one document, one house, and two sides. A complex one has a trust that was amended three times, a family home in Los Altos Hills, two rentals in San Jose, a cabin at Tahoe, an LLC that holds the rentals, the business Dad ran for thirty years, a brokerage account with its own beneficiary designation, and five siblings who have not all been in the same room since the funeral. The deeds do not match the trust schedule. Nobody is sure who manages the LLC now that Dad is gone. Somebody has been collecting the rents.

Five things reliably push a case into this category:

  • Multiple properties, often in more than one county, some titled in the trust and some not.
  • Entities held in trust. An LLC, a corporation, or a partnership interest, where the trustee may also be the manager and nobody has settled who controls the business today.
  • A family business that has to keep operating while the family fights over it, with employees, customers, and a bank that would all prefer not to know.
  • Blended families and several siblings. A second spouse and children from a first marriage, or five siblings with five lawyers, each with a different theory of what the parents intended.
  • Enough money that everyone can afford to fight. At a few hundred thousand dollars, cases settle because litigation costs more than the dispute. At several million, they do not settle until someone has done the work.

Whether the case is in the probate court in San Jose or the San Mateo County Superior Court in Redwood City, the judge applies the same Probate Code. The difference is how much there is to prove and how much can go wrong while you prove it.

How we run a complex case

Records at scale. A complex estate produces tens of thousands of pages: years of bank and brokerage statements, the entity's books, property records, tax returns, and the drafting lawyer's file. Legion, the AI litigation platform our founder co-founded, reads all of it and builds the transaction timeline in days. That used to be six months of associate time, and it used to be where the budget went.

Forensic accounting. When the question is where the money went, we bring in forensic accountants. They trace the transfers, reconstruct the entity's books, and testify. Our platform hands them clean, organized records, which is most of what they would otherwise charge for.

Control of the entities while the case runs. A business held in trust cannot wait for a trial date. Early in the case we ask the court for the orders that settle who signs the checks, who votes the interest, and who cannot sell anything: instructions under Probate Code section 17200, and where a trustee is on both sides of a transaction, suspension of the trustee's powers and appointment of a neutral (section 15642). Whoever controls the entity during the litigation has the upper hand, so we deal with that first.

Section 850 petitions. Property titled in the wrong name, an entity interest that was supposed to be assigned to the trust and never was, a house deeded to one child the year before death: Probate Code section 850 lets the probate court decide who owns it and order it conveyed. Where the transfer was made in bad faith, by undue influence, or through elder abuse, section 859 doubles the recovery and can add fees.

Partition. When co-owned real estate comes out of the trust and the siblings cannot agree on what to do with it, a partition action forces a sale or a division. Sometimes the prospect of one is enough to produce a buyout.

Valuation. Every complex case has a valuation fight: the business, the real estate, the discount for a minority interest in an LLC. We retain appraisers and business valuation experts early, because the number drives every settlement conversation and the other side will have its own.

Mediation, then trial. Most complex estate cases settle, usually at a mediation with a retired probate judge, and usually only after the records have been read and the valuations exchanged. We prepare every one as if it will be tried, because that is what produces a settlement worth signing. When it does not settle, we try it.

Who we work with

  • Trustees of large or entity-holding trusts, whether they are defending a petition or trying to administer a difficult trust without one. Our trustee page explains how that engagement works and who pays for it.
  • Beneficiaries who have been cut out, shorted, or kept in the dark about an estate with real money in it.
  • Family business owners and their successors when the founder's death or incapacity puts the company in the middle of a trust dispute.
  • Professional fiduciaries who have taken over a troubled trust and need litigation counsel for the surcharge claims, the section 850 petitions, and the accounting objections that came with it.
  • Estate planners and CPAs whose clients' plans have landed in litigation. We are litigation counsel. We do not redo the plan; we build the case on it, and we send the client back when the fight is over.

Where these cases come from

Complex estate cases tend to come from the communities where estates are large and the family home has been appreciating since the 1970s: Palo Alto, Los Altos, Los Altos Hills, Saratoga, and Los Gatos in Santa Clara County, and Atherton, Menlo Park, Woodside, Portola Valley, Hillsborough, and Burlingame on the Peninsula. A Los Altos Hills house held in trust since 1985, a Woodside property with an LLC around it, an Atherton estate with a second spouse and three adult children: those are the fact patterns.

Santa Clara County cases are heard in the probate court in San Jose. San Mateo County cases go to the Superior Court in Redwood City. We handle both, and we meet by video, so the family members who moved to Seattle or Austin are as much a part of the case as the ones who stayed.

Am I too late?

How long do I have?

A trust contest still has to be filed within 120 days of the trustee’s notice (Probate Code §§ 16061.7, 16061.8), no matter how many properties are in the trust. The practical clock is faster: a rental portfolio can be refinanced and an LLC interest sold while everyone argues about who is in charge.

General information, not legal advice. Confirm your dates with a lawyer.

Questions people ask about complex and high-value estates

What makes a trust or estate case complex?

Usually the assets, not the law. Several properties in more than one county, a business or LLC held in trust, retirement and brokerage accounts with their own beneficiary designations, a blended family, and an estate large enough that every side can afford to fight. Add a trust that was amended more than once and you have a complex case.

How do you handle a family business held in trust?

First, who controls it today: who is the manager or officer, who holds the voting interest, and whether the trustee is on both sides of any transaction. Then we ask the court for the orders that keep the business running while the dispute is resolved, up to suspending the trustee’s powers and appointing a neutral (Probate Code section 15642). Valuation comes after control.

Can the court split up real estate the family cannot agree on?

Yes. Once property has been distributed to co-owners who cannot agree, a partition action forces a sale or a physical division. Before distribution, the probate court can instruct the trustee on whether to sell, hold, or distribute in kind (Probate Code section 17200). Which path is better depends on the tax basis, the tenants, and who wants to keep what.

What does a case like this cost?

The cost tracks the number of assets and experts, not the size of the estate. Forensic accounting, appraisals, and business valuation are the big line items. The records review, which used to be the biggest, is where the AI platform we run on saves the most. We give you a budget after the first look at the documents and update it when the facts change.

Do you work with our estate planner or CPA?

Yes, and we would rather. The planner knows why the trust was written the way it was, and the CPA knows where the money went. We are litigation counsel: we do not redo their work, we build the case on it, and we send the client back to them when the fight is over.

This page is general information, not legal advice, and reading it does not make you a client of Rothrock Legal. No attorney-client relationship exists until an engagement letter is signed. Deadlines depend on your facts and change; confirm yours with a lawyer.

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