For me (and as I understand for the others) it is primarily not about the size, but about the unit as a whole.
The house looks as if you or a layman pre-planned it for the architect. I can hardly imagine that an architect who plans Bauhaus houses would design such an uncharming box. He would probably also pay more attention to privacy and make the staircase passable (IT IS TOO SMALL!)
Well, as I said, it's a question of cost. We want a lot of space for "little" money. Sure, the angle could have been left out, but then it would get tight with the property boundaries again. The plot is relatively narrow in the building window and gets wider to the back. Since you are only allowed to build with a northwest orientation here, the angle was incorporated.
Why should the staircase be too small? It is exactly the same size as in my parents' house, which has roughly similar conditions. I go up and down the stairs, that is the whole point of a staircase. Why should I make the staircase bigger and waste even more space?
Not to mention a straight staircase, which takes up endless space. Besides, I’m not really into straight staircases. That’s one of those modern fads nobody needs. I hardly know any house in my circle of friends that has a straight staircase.
Having the kitchen by the terrace is quality of living. You run inside every 10 minutes to get something to drink or eat. Or a towel, or the glasses, or the book. The salad bowl in the evening also doesn’t want to make a house tour but be fresh on the terrace table.
If your above argument is serious – I mean, I understand this guest/WC unit – but then something has really been planned wrong here. The guest is not there 24/7 continuously. But you are building a house that is supposed to function – not for the guest, but for yourselves.
That is important to you, you wrote so yourself. So why should it matter to you if a guest camps with you and has to shuffle through the hallway?
How lucky that I have no children. Still, you should pay more attention to the others here who already have families in matters of children’s rooms and realistic proportions.
Funny that everyone here says that, the kitchen-living room-terrace constellation is exactly like in my parents' house, only they also have a terrace door. In fact, everyone goes through the living room to go to the terrace. The side door is almost never used, at most to take out the trash.
A second door to the hallway probably wouldn’t be wrong. Then you don’t always have to trudge through the living room when you want to go upstairs or downstairs.
I once calculated just for fun how big the children’s rooms could be if you made the bedroom 10 sqm smaller and the hallway 5 sqm shorter. Even under these ideal conditions, I come to max. 17 sqm per children’s room. That’s really not a big deal.
The children move out at 20 years old, what do I want with big children’s rooms then. My wife and I will certainly live in there longer.
Maybe it stays with two children, then you still have a playroom for both.
By the way, practically nothing happened in the children’s room during my childhood. It was used for sleeping and studying if at all; mostly it was almost too lonely for me to sit alone in there to study.
My kids are the same, they want to play in the garden. If they stay inside longer, they become unbearable. That’s what a 1100 sqm plot is for.