This is so pretty. I feel like that window could be moved though, as well as the chandelier as iddalai pointed out. One thing you could try is make it 50% opacity. It's a neat little trick to add some depth.

One issue is the form of the room. Houses exist in squares and rectangles, very rarely in rooms that basically zig-zag down.
_
...|_
......|
......|___

Never like that, though. It would be more likely to look like so:
___
......|
......|___

Or... silly mapping.

It looks nice but could be improved!