the secretly large closet to your office

I dream of having an apparently small office that everyone else has, but the closet contains an entrance to a very large area.  Perhaps I live in there, sleep, whatever.  Fancy that.

And on cold winter mornings, when the rest of the office is still chilly, you can go into your backroom and sit in your armchair in front of a nice warm fireplace.  Perhaps enjoy a nice steaming cup of tea.