Who can start an ancillary proceeding?

Section 12510 allows any interested person, or a sister state or foreign nation personal representative, to petition for probate of the nondomiciliary decedent's will, appointment of a local personal representative, or both.

Which California county handles ancillary probate?

Section 7052 decides. If property is located in the county where the nondomiciliary decedent died, that county. Otherwise any county where property is located — and where property sits in several counties, the one where a petition is first filed.

Can I avoid ancillary probate on a California vacation home?

Sometimes, if the property is held in a trust, in joint tenancy, or under a recorded transfer on death deed. Those pass outside administration. Property held in the decedent's sole name generally does not.

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.

A folded property parcel survey map spread flat on a wooden table, a single brass house key resting at the centre. — A second home in California can pull an out-of-state estate into a second court.

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 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
Under the small estate threshold	Possibly not — see §13100

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.