i could be wrong but i have been lead to believe that boundary fences are to be settled by the original owners of the houses involved. If there is an existing fence there that they want to replace i dont know what happens there. The last house i owned my neighbour flattened the shitty picket dividing fence when cutting down a tree. I just said to him that he broke it he fixes it. He replaced it with colorbond fence and cost me $0...