I have a nightmare Mr Nasty builder doing up a small property next door. He is well known to relevant depts of local council and other builders who seem to follow him round putting right what he does wrong ....I'm pretty easy going but he has been at it for two years ! Burning rubbish every day from dawn to dusk, constant wizzing of tiles and bricks and it is starting to look worse than when he started. He does everything himself - badly. He is completely unapproachable and has now fitted pipes and two gas bottles as a permanent feature I think to run a kitchen water heater. He doesn't seem to know what he's doing and there is now a weird noise intermittently and often during the night and right by my bedroom window which wakes me. It is a sort of loud haunting hunting horn one tone long note lasting about 8 seconds. He has put a round vent into a hole in the wall. I thought maybe it was wind blowing into this, but it happens even when there is no wind. Any ideas from my mad description so I can maybe approach his son with a suggestion ? and as I type, there it goes again !
At the risk of sounding nuts .... it is not so much a high pitched trumpet noise more a mid pitched hunting horn sort of foghorn. This guy tinkers with and claims to be a qualified spark, he tinkers with gas, I have heard him say, "cover it up, they'll never know", I have seen him fill a hole with what looked like a disposable nappy and render over it. Building control are a bit of a toothless tiger as they know him well but seem only able to advise rather than enforce standards. 
It's a bad situation as I may have to sell quickly at some point due to failing health and if I have a declarable neighbourly dispute it could cost me a sale in an already dodgy market.
