We live in a mid terraced house, one side empty, the other side a couple of siblings (early twenties) moved in about 3 months ago. They moved in after doing about 4 months noisy renovation work which we could hear everything of as it was during lockdown so we were wfh! But hey ho not an issue altho it was a little annoying.
Since they've moved in every Saturday they've been having gatherings at theirs until 2/3 in the morning.
Now they haven't been blaring music or anything, but they are loud! Shouting/running up the stairs/singing/etc. After 3 weeks of this we went round and politely asked them to keep the noise down, so the next 2 weeks were bliss! But now it seems to be back to every Saturday again; and the noise keeps us up until at least 2 or 3 every week.
Are we being unreasonable to complain to them again? I mean our houses are connected so of course we can expect to hear noise and wouldn't expect them not to have people round as it's their house, but surely they should be a bit more quiet after like midnight on a Saturday night?