Cal. Prob. Code § 3074

Notwithstanding any other provision of this article, a transaction that affects real property, entered into by a person acting in good faith and for a valuable consideration, is not affected by the fact that one or both spouses have conservators unless a notice of the establishment of the conservatorship or conservatorships, as the case may be, has been recorded prior to the transaction in the county in which the property is located.