CA Civ Proc Code Section 1710.20

(a)

An application for entry of a judgment based on a sister state judgment shall be filed in a superior court.

(b)

Subject to the power of the court to transfer proceedings under this chapter pursuant to Title 4 (commencing with Section 392) of Part 2, the proper county for the filing of an application is any of the following:

(1)

The county in which any judgment debtor resides.

(2)

If no judgment debtor is a resident, any county in this state.

(c)

A case in which the sister state judgment amounts to twenty-five thousand dollars ($25,000) or less is a limited civil case.