I'd have a question regarding the doors, walls and windows.
As far as as I see it in your examples the walls are 2 tiles high, right?
Regarding the door: the open door area itself is ~16x23px so leaving out 1 wall tile for the door is not enough but leaving out 2 wall tiles leaves a 5px gap on top. How is that intended to work? For your example I've seen that you used the black wallpaper for the door, there it's simple, but for the others it means I have to make tiles with 5/8px height cut off for the door passthrough?
Regarding the windows: how are the small windows with the blinds are intended to be used, currently I have the feeling that I need to offset them by ~8px and position them in the center of the wall to make the blinds work or use rooms with 3 tiles height, what's the intention there?
Cheers!