By Corcoran Smith Law Corp. · Published · Updated
Ancillary Probate in California
Ancillary administration is the California proceeding for the estate of someone who died domiciled elsewhere but left property here. Under Probate Code section 12510, any interested person or an out-of-state personal representative may petition to probate the will, appoint a local representative, or both.
Preparing a California matter for local counsel
For an out-of-state lawyer or personal representative, the first task is to confirm whether California court administration is necessary. Prepare the decedent’s domicile, the California county and deed, the will or trust, and the home-state case information. Identify any property sale, notice or hearing with an approaching deadline.
- Appointment: what authority has the home-state court actually granted?
- Property: how is each California asset titled, and are any nonprobate or simplified transfers available?
- Coordination: who will handle California filings, tax questions, creditor issues and communication with the client?
- Scope: which person or entity would California counsel represent, and are there potential conflicts?
See resources for out-of-state counsel for intake and fee-division considerations. If only the executor lives elsewhere, start with out-of-state executor duties; that fact alone does not make the estate ancillary.
What triggers a California proceeding
California draws the line at domicile, not citizenship or property. Probate Code section 12501 defines ancillary administration as proceedings in this state for administration of the estate of a nondomiciliary decedent — someone domiciled elsewhere at death who nonetheless left property here. Section 12510 sets out who may start one: any interested person, or a sister state or foreign nation personal representative, may petition the court for probate of the nondomiciliary decedent’s will, for appointment of a local personal representative, or for both together. Which county hears it is governed by section 7052 rather than the ordinary domicile rule, because there is no California domicile to point to. The test looks first to the county where the decedent died if property is located there, and otherwise to any county where property is located. Where property sits in more than one county, the proper county is the one in which a petition is first filed.
Sources: Probate Code s.12501 - Definition of ancillary administration · Probate Code s.12510 - Commencing an ancillary administration proceeding · Probate Code s.7052 - Venue where the decedent was not domiciled in California · Probate Code s.8400 - No power to administer until letters issue · Verified 2026-08-20.
When the will was already admitted somewhere else
The home-state or home-country court has often admitted the will before anyone turns to the California property. Section 12520 addresses that case. If the will of a person who died domiciled outside California has been admitted to probate in a sister state or a foreign nation and meets the requirements of the article that section begins, its probate in the California ancillary proceeding is governed by that article. A will admitted elsewhere that does not meet those requirements can still be offered in the ancillary proceeding under the ordinary procedure that begins at section 8000.
Sources: Probate Code s.12520 - Will admitted to probate in a sister state or foreign nation · Verified 2026-10-02.
Heirs and named executors who live in another state or abroad should also read inheriting from a California estate when you live elsewhere.
When it is and is not needed
| How the California property is held | Ancillary probate? |
|---|---|
| Sole name of the decedent | Generally yes |
| Titled in a living trust | No — the trustee administers it |
| Joint tenancy with right of survivorship | No — it passes by survivorship |
| Recorded transfer on death deed | No — see TOD deeds |
| Property potentially eligible for a simplified transfer | Check the asset type and statutory requirements. A personal-property affidavit does not transfer real estate; see real-property succession procedures |
Running two estates at once
The practical difficulty is rarely legal. It is that two courts in two states are administering one family’s affairs on different calendars, with different local rules, and often different lawyers who have never spoken. The California proceeding still runs the ordinary machinery — letters before any authority under section 8400, the four-month inventory, the creditor window — and the California statutory fee schedule applies to the property administered here.
Related: the administration process, opening the estate, filing by county, and how a TOD deed avoids all of this.
The Probate Code sections behind this page
Each section links to its official text at the California Legislature’s own site. The full index of sections covers the rest of the Code.
- Probate Code section 12501
- Definition of ancillary administration. Read section 12501
- Probate Code section 12510
- Commencing an ancillary administration proceeding. Read section 12510
- Probate Code section 12520
- Will admitted to probate in a sister state or foreign nation. Read section 12520
Also cited above, explained elsewhere on this site
- Probate Code section 7052
- Venue where the decedent was not domiciled in California. Where section 7052 is explained
- Probate Code section 8000
- Petition commencing administration. Where section 8000 is explained
Before you call: What probate costs · How long it takes · Which court hears it
Attorney, fiduciary or financial advisor with a client matter? How to refer a California probate or trust matter