CA Civ Code Section 8600

(a)

This section applies if, before the commencement of work, the owner in good faith files a direct contract with the county recorder, and records a payment bond of the direct contractor in an amount not less than 50 percent of the price stated in the direct contract.

(b)

If the conditions of subdivision (a) are satisfied, the court shall, where equitable to do so, restrict lien enforcement under this title to the aggregate amount due from the owner to the direct contractor and shall enter judgment against the direct contractor and surety on the bond for any deficiency that remains between the amount due to the direct contractor and the whole amount due to claimants.