Cal. Sts. & High. Code § 5414

An action for the recovery of any assessment may be brought in the superior court within whose jurisdiction the city is, in which the work has been done. If any of the assessments are made against lots, portions of lots, or lands, the service of process in the action may be made in the manner prescribed by law. A single action may be brought under any assessment irrespective of the number of lots assessed where the parties defendant are identical. If separate actions are brought, they may be consolidated by order of the court.