I've given this a once over, and I must say I agree near completely with the critique Ymlong gave, so look there for my opinions.
Only one I object to is the general critique on window sizes, as anything from 1x2 to 3x2 is acceptable from what I know
what matters is that you don't overuse any of them, which is the feeling I'm getting in particular from your top floor.
You don't need a window everywhere
I'd also like to emphasis that the lack of a bedroom and bathroom is something I'd recommend you remedy as soon as possible, since according to the requiremnts I'm familiar with, it's a condition for instant rejection if the house cannot support someone living in it.
Edited by Lazaruz95, 25 March 2013 - 01:44 PM.