Do I need to Serve Notice : Loft Conversion

Do I Need to Serve Notice: Loft Conversion We were recently asked the question ” My builder said that because¬†I am carrying out a loft conversion under “permitted development” rights rather than having applied for Planning conversion I do not need to do anything regarding the party wall and my neighbour is that correct?” In short – If you are Cutting into the party wall between you and your neighbour¬†to…