Cal. PROB § 13151

(a) If a decedent dies leaving real property that was their primary residence in this state and the gross value of that real property does not exceed seven hundred fifty thousand dollars ($750,000), as adjusted periodically in accordance with Section 890, and 40 days have elapsed since the death of the decedent, the successor of the decedent to an interest in that real property, without procuring letters of administration or awaiting the probate of the will, may file a petition in the superior court of the county in which the estate of the decedent may be administered requesting a court order determining that the petitioner has succeeded to that real property.

(b) A successor who files a petition pursuant to subdivision (a) shall deliver a notice of the petition to each heir and devisee named in the petition pursuant to paragraph (7) of subdivision (a) of Section 13152 within five business days of filing the petition.