What's acceptable noise at 5am?

Op sounds like they come on expecting everyone to agree with them, not much consideration from them though, gets tetchy with posters that dissagreed with them and now plans to carry on as they were. Some People in Ireland dont seem to do consideration well, 5am is not a reasonable time just because the Op likes coffee,few suggestions to change their routine which they could make easily and they make excuses to avoid and insult their suffering neighbour.

Start to finish, you sounded reluctant to make any change and faulted your neighbour a number of times, they have come to you and told you its noisy and bothers them,you are more concerned about your coffee,doesnt matter what your housemates say, it is likely they tolerate you and are even less likely to complain, even if it really doesnt bother them, The way you describe them as housemates doesnt make it sound like you own or have a longterm vested interest in maintaining neighbourly relations. If you are an owner, you're causing a problem needlessly, Whatever the situation, regardless of the build quality of the properties, a bit of consideration goes a long way, maybe you didnt grow up in an attached home, or imo people had less reason and means to make noise than in times past, still, does not mean you can be inconsiderate, which you are, screams me me me, you dont know or admit it. Grow up and have some consideration.

I'm with Sono, and everyone else of the same opinion. It's obnoxious. How you can enjoy your coffee knowing it's at the expense of someone else's sleep is beyond me. You will not pass away from drinking pre-ground coffee, your only-in-your-head notions of what makes a good coffee are ridiculous.

If you buy/rent a house and you enjoy grinding coffee in the morning, go for it.

Whatever chance of the neighbour being reasonable went out when they complained about how loudly you close your microwave. The idea that the coffee grinding/soundproofing is your issue, and not your neighbours is funny. Your behaviour doesnt need to change, especially if there are no complaints from inside your own house.

You are entitled to do x or y in your own home.

If the shower was waking the neighbour up, it is acceptable to request your neighbour to change. If you have a coffee grinder that grinds for 12 seconds, its not unreasonable to want to use it for a morning coffee.

If your next door neighbour complains about how loud you are closing the microwave, he/she is being unreasonable.

Let them get ear plugs/soundproofing/etc.

I had some sympathy for the Op until I read his replies. Smart alecky and churlish, sorry Op, and I fully agree with the poster 1874 who was spot on in their criticism. While it's a pain having your freedom curtailed in your own home and no doubt some neighbours can be ott the fact is that constant 5AM noise waking you up would be hard to live with. Some people might be philosophical like the poster that said "there goes coffee neighbour off to work" but unfortunately not everyone is so easy going. The sound proofing sounds utter shite and both have to live with that and next door to each other but this particular 5AM coffee issue could be resolved with a bit of good will from the Op. It really is all about having a bit of consideration, Op, so my advice is be considerate and find a compromise or else go move to a detached house out the country where you can make as much noise as you like.