Underground Utility License Underground Utility contractor is defined as any entity engaged in the installation, repair, alteration, or replacement of underground utilities, outside of buildings, making connections with public and/or private underground utilities, provided that such work is to be done between the main, laterals, services and/or appurtenances to within five feet (5′) of the outer walls of a building or structure. Exceptions: Any person licensed as a master plumber or a master pipefitter. Any public utility, or agent thereof, regulated by the public utilities commission or the division of public utilities and carriers shall be exempt from the provisions of this chapter.