In Hungary, there are lots of complicated rules for counting how many rooms a house has. There are tax breaks on mortgages etc if you meet various complicated criteria. (They have abolished the concept of half a room, pace Stephen Leacock in 'Boarding House Geometry': All other things being equal, a single room is said to be a double room').
I just wonder how you count yours? I mean does an outside toilet, would you count that as a room? A shed? A garage? The stairwell? The hallway? Is the pantry off of the kitchen a separate room or part of the same room? If your bathroom has a toilet that is kinda in the room but walled off, is that a separate room? Is your attic/loft a room (obviously I mean if just used for storage)? A basement?
I don't want legal definitions, just how you think of it. My concept of what a room is tends to depend on whether I have to clean or decorate it. Then, a hallway is definitely a room.