A license is required prior to securing a permit and performing work in the following trades:

A homeowner may take out a permit to do electrical work in her or his own home. The electrical work must be associated with a repair or remodel (i.e., not construction of a new home). A homeowner's electrical permit is only issued to a person who passes the Home Owner's Electrical Exam.

A homeowner may take out a permit to do plumbing in her or his own home. The plumbing must be associated with a repair or remodel (i.e., not construction of a new home). A plumbing permit may be issued to a homeowner who demonstrates her or his competency to the building official.
Sewer and Water

Only Master electricians, Master plumbers and Master HVAC contractors may pull permits.

There is no license required to work as a General Contractor.