Running the Business · Part 6

Adding classifications: when to add the B, the C-20, or a second specialty, and how the exam waiver works

A C-36 can do plumbing and the work that is incidental and supplemental to it, and nothing else. The day a customer asks the plumber to replace the furnace with the water heater, or a remodeler asks for the whole bathroom, the answer is a second classification or a subcontract. This lesson is the map: what the C-36 covers and where "incidental" ends, what the C-20 adds and what a B or B-2 adds, the exam that a new classification normally requires, and the section 7065.3 waiver that lets an experienced qualifier add a closely related classification without one. It ends with the business question: which classification the market you are already in is asking for.