Cal. Civ. Proc. Code § 488.475

(a) The following property may be attached pursuant to this article notwithstanding that the property levied upon is the subject of a pending action or special proceeding:
1. (1) Real property.
2. (2) Growing crops, timber to be cut, or minerals or the like (including oil and gas) to be extracted or accounts receivable resulting from the sale thereof at the wellhead or minehead.
3. (3) Tangible personal property in the possession or under the control of the defendant or in the custody of a levying officer.
4. (4) The interest of a defendant in personal property in the estate of a decedent, whether the interest arises by testate or intestate succession.
(b) Except as provided in subdivision (a), attachment of property that is the subject of an action or special proceeding pending at the time of the attachment is not effective.
(c) If attachment is attempted but is ineffective under subdivision (b) and the levying officer has requested a garnishee’s memorandum under Section 488.610 in connection with the ineffective attachment, the garnishee’s memorandum shall include the following information in addition to that required by Section 488.610:
1. (1) A statement that the attachment of the property is not effective because the property is the subject of a pending action or special proceeding.
2. (2) The title of the court and the cause and number of the pending action or proceeding.
(d) For the purpose of this section, an action or proceeding is pending from the time the action or proceeding is commenced until judgment has been entered and the time for appeal has expired or, if an appeal is filed, until the appeal has been finally determined.
(e) Nothing in this section affects or limits the right of the plaintiff to obtain a lien pursuant to Article 3 (commencing with Section 491.410) of Chapter 11.