What I did was to write
in purchasing contract that seller agrees to let buyer show the house befor completion. As for now, you only can ask seller to do you a favour. If the house is empty, then I don't think seller will mind.
in purchasing contract that seller agrees to let buyer show the house befor completion. As for now, you only can ask seller to do you a favour. If the house is empty, then I don't think seller will mind.