A builder brought the house next door to sell on. Hes built an extension. Dad was always under the impression that when you build you keep 6" away from the dividing line. He did phone the council but quite frankly they said building regulations have been relaxed and were ok with this. So its almost built and the builder has chopped off some of dads roughcast, dad got up and measured the gap between the bedroom windows and the builders house is 4" over the central line (he was obviously just going to roughcast over it thinking dad wouldnt notice. Dad questioned it and he went quiet. So the position is mom and dad want to put their home up for sale but are worried a surveyor will pick up on it and there could be problems with it. So what should dad do?