Neighbour building on land.

ProDave

If you take down your own low fence, and accept the boundary now as the neighbours new, higher fence, then in doing so you will have "got back" probably half of the land you lost.  Is that not the simplest sollution?

rik111

You have to question to as why your neighbour went to vast expense to erect a 24 long 6ft high fence, when there was already one in situ..... And I would love to hear your definition of a party, a full on rave in the back garden or another couple having a cup of tea with them. I very much doubt it was a full on party and even if it was, how exactly is this in any way dangerous to yourselves? Do your neighbours often come into close contact with you as you appear to be hardly on speaking terms....
There is a lot more to this tale than you are letting on, would love to hear what neighbour has to say about you.
Oh and next time a rave is going on next door, just ring the Police, they will come and shut it down and fine everyone.

EB75

Thank you for the great advice. we really do appreciate people taking the time to give it, plus we take the constructive feedback on the chin.
I agree maybe we were trying too hard to get on with our neighbour, rather than addressing the issues and believing his account . Maybe we didn't expect others to do something we wouldn't think of doing ourselves. We did have a brilliant relationship with the last neighbours and perhaps we were expecting the same given how we actually have gone out of our way to help the man. Life lesson learned, don't be too trusting, and sometime people tell you all the checks are done when they are not. Maybe we assumed a policeman living next door to you in what has been a brilliant environment to see our kid grow up in, with all the other neighbours getting along, would want the same. We have lived here for 15yrs now and all our other neighbours on our close have lived here longer, apart from the ones attached. I can honestly say what lovely people to live close by to, we couldn't have got better.  The challenges of Covid have also just backed up these thoughts. 
I have now contacted a surveyor who is coming next week to do a survey, we have the boundary survey but as the extension is in place and attached to our glass roof of the back of our house, for piece of mind I need to be sure of what damage, if any, has been done to our home/land. It costs a fortune, but for piece of mind, if not anything else, I need to be sure. Now we know that the correct procedures have not been followed, how do we actually know the building work has been done correctly and won't effect our home in the future or indeed isn't affecting it now.