We have a situation where our neighbour wishes to rip down a 50 year old hedge which has been the dividing boundary on the front of our property for all of that time - going through 4 different owners of the property next door. We have just had a surveyor peg out the side boundary and the hedge is in fact on the neighbours land but only a maximum of say 450mm from the boundary line. Our question is, how far is too far away from the boundary line? They want to rip down the hedge and lower their side of the boundary and put up a retaining wall so they can put their bins up the side of the garage and then put up a fence. We would appreciate some feedback on this! Thanks!