Cal. Civ. Code § 2783
As used in Sections 2782 and 2782.5, "construction contract" is defined as any agreement or understanding, written or oral, respecting the construction, surveying, design, specifications, alteration, repair, improvement, renovation, maintenance, removal of or demolition of any building, highway, road, parking facility, bridge, water line, sewer line, oil line, gas line, electric utility transmission or distribution line, railroad, airport, pier or dock, excavation or other structure, appurtenance, development or other improvement to real or personal property, or an agreement to perform any portion thereof or any act collateral thereto, or to perform any service reasonably related thereto, including, but not limited to, the erection of all structures or performance of work in connection therewith, electrical power line clearing, tree trimming, vegetation maintenance, the rental of all equipment, all incidental transportation, moving, lifting, crane and rigging service and other goods and services furnished in connection therewith.
Ca. Civ. Code § 2783