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Plumbing License Requirements. Plumbers licensing requirements for a journeyman and master plumbers license are usually determined at the state level and the necessary requirements and exams vary in each State. The enforcing & regulating of the state plumbing licensing requirements often fall under individual municipalities.
All plumbers, electricians, and mechanical contractors are required to obtain a State commercial license with the State Licensing Board for Contractors to bid, contract, perform work, or be issued a permit for these trades if the cost of a project is in the amount of $10,000 or more.