He also informed me today that he knocked out all the chimney breasts when he renovated it. Should he have got a party wall agreement for that?
I agree. Last time I went to the CA regarding a neighbour dispute, the old lady just said smash their back doors in, brick their windows and torch the place.It’s good to know we have a few people that know their stuff on here, really good info, like a Citizens Advice but with more expertise.
Ask him what permission he had to do this, building regs etc.
If he has done it cowboy style then I personally would be seeking legal advice.
Do you get on with your neighbour?