Hi Tina,
Thank you so much for reaching out and I'm sorry to hear that you've been struggling with this. That must feel very frustrating.
The first thing I'll mention is that it may be important to keep exchanges in writing, for the most part (if possible). If you've got documented evidence that this is an issue (eg: a text to your housemate explaining the problem, how it's affecting you, and suggesting a solution), which you can then take to your landlord if you feel that you're getting nowhere with your housemate - it's difficult to ignore hard evidence. If you keep your texts are as civil and non-inflammatory as possible, then you may also have a better chance at resolving the issue, whilst also not giving your landlord a reason to ignore your claim. Not that they should be ignoring it, but given what you've said, exchanges that aren't friendly could unfortunately give them a reason not to act on it, which would be counterproductive.
If you are planning to go to your landlord, it may be worth mentioning to your housemate that this will be your next action should he refuse to stop making excessive noise at night-time - this could convey the severity of the issue and give him the chance to resolve it discreetly first.
Do you live with any other housemates? If you do, it may be worth having a chat to them about your noise concerns and see if they have noticed or feel the same - the issue may be better resolved if a few people are complaining to your housemate, and your landlord may also be more likely to listen and be responsive to multiple complaints.
The most salient point here is to make sure you've got important exchanges (eg: with your housemate who is causing problems, with your landlord) in writing. If your housemate refuses to do anything and your landlord is ignoring your claim, there are organisations you may be able to contact to ensure that you are being treated fairly by your landlord (and subsequently, your housemate), and having documentation of exchanges and timestamps will help support this.
Otherwise - and this may be a last resort option - it may be worth looking into other rental properties, if this is what it comes down to. Ultimately, it would be up to you to decide whether that would be a feasible option, as that can induce a variety of other inconveniences into your daily life.
In the meantime, there may be small things you can do to improve sleep hygiene despite the noise - noise cancelling headphones, or even running some white noise or calming music without headphones through your device of choice... something to drown out or distract you from the sound that is still conducive to sleep. Even meditating can put you into an optimal state of mind to fall asleep with greater ease.
I hope this helps, please feel free to continue chatting with us if you'd like to, we're here to support you.
All the best, SB
