Suggestions for improvement to our floor plan

I would also wonder whether I would have to build that large on 441 m², maybe there are nicer solutions.

Beauty is in the eye of the beholder, but differently. I wonder, is there no floor area ratio where you are? Because you would exceed that quite quickly if it is 0.4.

Thank you for the helpful answers!! The plot ratio is 0.4 and the floor space index is 0.8. With a plot ratio of 0.4, the maximum permissible Grundfläche would be 176.4 sqm, or am I mistaken?

Yes, you are mistaken. Make a new plan, you will exceed the floor area ratio. It is about the built-up area, in your case that is already 140 sqm for the house and garage. You are allowed to build up to a maximum of 176.4 sqm. Your house alone has a built-up area of 120 sqm. Our plot is also 440 sqm, also floor area ratio 0.4 and we try not to exceed the 90 sqm built-up area. By the way, if I interpret your plan correctly, the location of the garage is fixed, isn't it?

55sqm of living space for the living room and kitchen is not exactly abundant, so one has to say it can't be done differently. About 24sqm are already wasted here on hallways. The kitchen seems very wide to me at 4 meters: too wide for a two-liner or U-shaped kitchen, too narrow for a counter placed lengthwise. The hobby room is nice-to-have, but somehow it seems to me that the room only resulted for the planner because of too much floor space. Hmm, maybe an existing plan from the general contractor was simply stretched? I also don't like these doors. My parents' house has a lot of these doors too, you can tell there is not enough space for cupboards. It's not that you couldn't slide them, but that should be the planner's responsibility before handing the design over to the client. How do the views look anyway? The windows don't seem coordinated to me. Regards

The thing with doors is also a matter of taste (which you can of course still point out ;) ) I myself never want to have my wardrobe behind a door again if it is at all possible. I have it in my current rental apartment out of necessity and it annoys me. If I have the space, I would plan so that nothing has to stand behind a door, absolutely nothing. As I said, a matter of taste

if I have the space, I would plan it so that nothing has to stand behind a door, absolutely nothing.

I don't understand. You just waste a lot of wall space ("space for placing things," as my wife says) if you do it the way in the design here in the first post (for example, children's room; it would be better to shift the doors by 60 cm each, which of course requires a redesign of the hallway).