My new cheapie has no fencing at all. It is bounded on 3 sides by vacant land, and one of those sides is at the peak of a ridge of hill and is ridiculously steep and covered in trees. This is the side I'm talking about here. But I'd still like to know where the edge is, beyond a survey peg in each corner. Can I just put up a star picket and strung wire (its too steep to bother with weld mesh or panels) fence at my own expense without asking the neighbours? Or do I absolutely have to ask for permission from them to put up a fence even if I don't want any contribution from them? 30-40m (its about 30m on the level satellite view, no idea what it is on the steep part, need to use Pythagoras' theorum) of wire and picket fence sure isn't going to break the bank and isn't worth chasing the neighbours for half of material cost. The other side of the block is not anywhere near as steep and the houses on that side have green panel colour bond fences, so that's a whole other level of cost and effort.