I've lived in 2 different shared houses, both with at least 4 other people. The trick is to make sure you have something in common with them; at the time I was really into Hard House clubbing and everyone I shared with was too, so it didn't matter that I had my music playing all the time because they did too.
In both houses I also managed to get at least 1 hour alone a day, partly by luck because my jobs at the time meant I finished work and got home first but also because I liked to tidy up when I got home, so my roommates quickly learned that the later they got home, the cleaner the house would be.
But sometimes though I still would feel a bit overwhelmed, so at times like that I just used to go out for a long walk and maybe get some food shopping for the house while I was out, or I'd just tell everyone that I was tired and would spend the evening/day in my room.
This was before I was diagnosed with AS or even suspected I had it, so obviously I never mentioned it to them and can't give advice as to whether you should or not.