Now I don’t mean to be a nerd, but I know where Crowley lives. You can see Big Ben and the Houses of Parliament through his window with the Thames (yes, that muddy brown line) visible at the bottom of the frame.

That means he lives in this building:

Or, he would, if it wasn’t part of St. Thomas Hospital, but we’ll say he lives there. Kind of fitting for a demon to be living at the heart of British politics, n’est pas? :)