In California, anyone bidding on a construction project that is $500.00 or more must have a license. To qualify you must show that you have four years of experience in your trade and take two exams, the Law exam and the Trade exam. The Law exam covers subjects such as contractors license law, worker’s compensation, safety codes, mechanic’s lien laws, etc. The Trade exam covers your particular trade with the exception of the C-61 Limited Specialty classification
, which requires no trade exam.