I'm a fan of JKR since before the gender stuff yet I had no idea where she lives. If somebody had asked me, I'd have said "Scotland I think". I probably could have found out where she lives if I'd wanted to go looking for it, but it never occurred to me.
However, now I know where she lives, as this information was thrust into my Twitter timeline.
Any comparison with the Queen, a ruling monarch with an official residence and a flag on the roof, is completely risible. JKR is a private individual and the two things are not remotely the same.