B - General Building Contractor

A general contractor is responsible for providing all of the material, labor, equipment (such as engineering vehicles and tools) and services necessary for the construction of the project. A general contractor often hires specialized subcontractors to perform all or portions of the construction work. When using subcontractors, the general contractor is responsible for the quality of all work performed by any and all of the hires.

A - General Engineering Contractor

A general engineering contractor in California is principally involved with projects that require specialized engineering knowledge and skill. Some examples of these projects include, but are not limited to, bridges, water power, flood control, harbors, airports, highways, parks, power plants, and refineries.

C-21 - Building Moving/Demolition Contractor

A building moving/demolition contractor raises, lowers, cribs, underpins, demolishes and moves or removes structures, including their foundations. This classification does not include the alterations, additions, repairs or rehabilitation of the permanently retained portions of such structures.

C-36 - Plumbing Contractor

A plumbing contractor provides a means for a supply of safe water, ample in volume and of suitable temperature for the purpose intended and the proper disposal of fluid waste from the premises in all structures and fixed works.