The open staircase must be there, we all like it. Of course, we have thought about it and left the option open to later possibly install a glass door if we come to the conclusion that it is too open and the heat escapes. We don't have a basement. And yes, I am brand new here and simply posted the floor plan spontaneously to hear opinions. I will follow up and post the required remainder later. (Just haven't had the time yet.) The question of why the older child should be in the north is simply answered: since he often has visits from friends and it sometimes gets loud and late, we and he also do not want to be directly adjacent to him. I prefer the younger one, who goes to bed at eight, next door. That is the only reason. Thanks for your tips and questions... I will consult my architect tomorrow and bombard him with questions.