Before Vectren connects natural gas to a building, the Building Inspection Division must issue a permit and conduct an inspection. A licensed plumber registered with the City of Dayton must apply for the permit. The homeowner can apply for the permit, but only if the owner lives in the house, the structure is a single-family residence, and the owner does the work and has the knowledge and ability to conduct a gas pressure test. Permit applications are available at the Building Inspection Division Office or online at Building Inspection Forms (see following link). To contact Vectren, call Customer Service at (800) 227-1376. A listing of plumbers registered with the City of Dayton is found atRegistered Contractors Lists.