[villagetinker]

While I have not done this personally, 2 neighbors have had propane installed. I believe the tanks are 250 gallon, and are buried, typically in the front yard near the driveway, and the gas line is buried back to the house. In both of these cases, the gas was to an outside kitchen, if you are going to the normal kitchen stove and it is not on an outside wall you will need to have the gas piping routed through the attic. I do not know if ARC approval is required, but I would call to be sure. All of the permits need to be pulled by the licensed contractor doing the work. IMHO I would leave the wiring and receptacle in place for future conversion back to electric (check if this is legal).