Our neighbors have demolished our boundary wall in order to lay foundations for their new build (their reason). However their new foundations and new wall have moved into our boundary wall. On the planning permission drawings their building was not to interfere with our boundary wall, but now it is right into it. We've asked for the wall to be put back to its original and they agreed but they are now saying that it's too expensive to do it like that. I've attached a few pictures. On the close up you can see the old boundary wall brickwork behind the new brickwork.
Anyone know what can we do about this?
Thanks for your help