Gotta take them on a case by case basis and cost or cost percentage should be a consideration. 95% of the time, contractors get the required circuit. But what happens when the panel is full and the bath is on the third or sometimes fourth floor and the house is knob and tube? Do I make them install a new service and tear open two or three floors of walls? I wouldn't make it happen but I would give a quick look to see if something could possibly be fished up and strongly suggest they find a way. I can usually get them to do it when I tell them they can't install the ceiling heat and electric toliet seat. The electric toliet seat is not a joke by the way.
