So we bought a detached house, and it's my own fault for not checking. So the side of my house is on the boundary. There is perhaps a 4 ft gap between our house and their garage. Sometime before we moved in they covered this over with corrugated plastic and put a proper sealed door at the front and extended a wall down the side of the house. They use this area all the time, more often then their actual front door, and I'm constantly hear them banging and crashing down the side of my house. I bought a detached house for a reason, they are noisier than any of my neighbours when I have lived in attached homes. They told me it's not attached, but aside from breaking into their house I have no proof. I can hear them clearly shutting the door as I do when DP shuts (stiff) garage door! Would they need to have planning permission for this, and if they have used my house to support the structure what can I do about it. I just find it so irritating as they are up at the crack of dawn and I wake me up!