My next door neighbour (who is a little bit bonkers and not very approachable) has gone to another part of the country for a year to study. While she's away she's 'rented' her house out to her 20 year old son and some of his friends. This son has a history of bad behaviour (he used to hold underage drinking parties a few years back and when we complained she got the hump and it made the parties worse).
She's been gone a few weeks and it's been a nightmare. They have mini-parties almost every night with loud music, shouting etc, and massive parties every friday & saturday night which go on into the early hours. They leave rubbish on the street outside and have smashed some glasses on the pavement. I don't think all the lads work as there is almost always someone in playing loud music. As we speak one of them is stood outside on his phone having a loud argument with what sounds like his boss. 
The noise is affecting DC's sleep and puts me on edge making it difficult for me to sleep too. I've been round a couple of times to ask them to keep the noise down, to be fair the lads are polite and turn it down but the next night it's the same story. My DH has stuck his head in the sand and likes to pretend there isn't a problem.
I don't want to cause a fuss with environmental health/police (who on past experience have been rubbish anyway) as we're planning on putting our house on the market in about 18 months and I don't want it to put buyers off, and the neighbour's course is only a year so they won't be here long term. But I'm very very fed up 
. AIBU?