I'd be really interested to see what enyone else would do about this. We bought our first home during the summer. Every garden shares a back fence with the house behind it, in our row. This fence marks the boundary as far as we are aware and is made of the conctrete bases and posts with slotted in panels. They were placed at the time of the houses' construction. Apart from at the end of our garden. The neighbour at the back has claimed verbally to us that the boundary fence (the concrete base) is his and that we have to replace our fence which is strangely inside the boundry one, at present. This means that he doesn't in fact have a fence at the bottom of his garden, just the concrete markers, and we are providing the fence at our expense, on our land, when it should actually be on the concrete markers between our two gardens and paid for equally by both of us. He seems to be a fairly odd man, he dumped several large piles of ivy into our garden during the summer, each of which we had to spend hours cutting down by hand, putting in garden bags and taking to the tip. (But then we caught him at it .) I've glimpsed him several times staring into our house from his upstairs windows which I'm quite uncomfortable with, as DD1's bedroom is at the back of our house. How would you go about dealing with this? As far as I'm aware we have every right to reinstate the fence on the boundary line, but I'm not entirely sure if it's worth the hassle. Though nor am I sure that in effect I want to have to foot the bill, and provide the maintenance for a fence which we should both have responsibility for. Though I'm of course over the moon to have a garden at last, I'm not quite sure how to go about things like this!