Dh worked from the dining room table (in a kitchen diner) until last term.
The one advantage was that he ended up doing all the cooking because he inevitably had an important meeting when I wanted to cook, so it became up to him. He also does most of the washing now as the washing machine plays a lovely tune when it finishes, so he wants it timed right. Apparently his team had started singing along with it 
He's now moved into the study as ds has now got a desk in his room.
This is a definite improvement, but I still hate it.
He doesn't get how intrusive it is. He'll say "oh you just ignore more and get on with what you have to do..." but it's really hard. I have to pass him to go out and will be asked where I'm going, or if I'm doing something that takes time he'll appear in the middle and make comments. He'll complain if I'm doing something loud when he has a meeting, and I can't really have friends over for a quiet coffee-he either joins in or complains about the noise.
Thing was during the first lock down he struggled with everyone (except me) being at home and started going out for some time on his own, so I don't get why he doesn't understand that it's the same for me.
We have managed some compromises: The first time we had someone coming to fix the boiler I told him what time they were coming and he looked blank. "Aren't you coming back to show him?"
I always have been the one to come back because I live nearer, my work is generally more flexible and I take the car, so that makes sense.
However he didn't seem to get that it didn't make sense for me to drive home at the relevant point, meet the gas man, show him the boiler and hang around in case he needed anything else when he was at home. So a good 1-2 hours out of work.
"What if I'm in a meeting?"
I pointed out that none of his meetings were so important he couldn't say "sorry, the gas man's come to fix the boiler, I'll be 2 minutes"
I'm not totally sure he gets it even now but he doesn't complain.
I think the thing that really irritates though is getting up. I get up at 7:30 and take the children to school on the way to work. He drifts up about 9:30.
But when I have a day off and the children are off, his alarm goes off about 9:20. Once he's pressed the snooze button around 4 times he start giving sighs and wants cuddles. I just want peace and quiet and to be able to lie in bed and read on my phone/read a book. I very rarely get a day where I can do that anyway.
Even when he's up he'll keep coming up and asking questions, or he'll start a zoom call at the top of his voice. Why do zoom calls always necessitate talking loud?
So there isn't ever that lovely peaceful time where I can lie in bed and relax in the way I could when he had to be in to work for 9am.
I've offered him three perfectly reasonable alternatives:
The shed-the roof only leaks in one corner so should be perfectly okay if he sits away from that.
The attic-he complains the steps would be awkward getting his computer stuff up and down. I said why would it need to come down?
The garage-just because it's in a block 5 minute walk from the house shouldn't exclude it. in fact I think it's ideal 