City villa floor plan 160 sqm - Please provide tips!

You probably haven't read my post very thoroughly.

Could you explain what is meant by that?

I explained that there, didn't I (?)
So far, the floor plans on your part have only been handled with kid gloves. More potential for changes can be expected through the specialist planners than in the entire design phase before.

Why should the structural engineer have to change anything?

He won't have to change anything: if a truss roof—and no concrete ceiling—is put on, the load-bearing walls in the upper floor are not needed as they are; and then it doesn't matter that they are drawn in an unfavorable way (ignoring the course of their colleagues on the ground floor). In drywall construction, the wall layouts can be placed more flexibly.

In the drawing, the walls in the upper floor are also shown as "solid"—their awkward layouts should actually have been noticed during planning—I therefore suspect some drawing program instead of professional structural engineering CAD. But, as I said, the change of materials alone will take care of that.

You probably didn't read my post very thoroughly

Yes, but I didn't understand it.

Binder roof? According to Google, it is made of wood. But we are getting a concrete ceiling on the upper floor. Conversely, we need the load-bearing walls on the upper floor, and accordingly, that doesn't fit with the ground floor, did I understand that correctly?

Rafters or trusses, both are made of wood. The rafter roof is more traditional and more common with a concrete ceiling, the truss roof is the "local champion" in the market segment of general contractor city villas with a hip roof and does not "require" the concrete ceiling. Where do you see their advantage in your case?

By the inverse, we need the load-bearing walls on the upper floor and accordingly that does not fit with the ground floor, did I understand that correctly?

Exactly. The concrete ceiling does not span this length in one go and needs load-bearing walls - which in turn are best positioned above supports below. You can manage the situation where this is not practically possible everywhere. But that then incurs extra effort (beams, increased steel reinforcement), so it should be kept to a minimum.

More cleverly, on the upper floor a load-bearing wall would not stand between the parents and child 2, but between child 1 and the stairs, and on the ground floor I would reinforce the side panel of the cloakroom and the wall section between the front door and the cloakroom window as well as provide a beam where only a symbolic line separates the cloakroom and hallway areas. Then the load-bearing wall between the parents’ bedroom and bathroom is not a "widow" (as the term would be in typesetting). Likewise, the one between the living room and stairs would then not be an orphan.

Where exactly is the chimney supposed to go (in which "corner"), it still stands quite close to the edge on the plan (?)

Rafter or truss, both are made of wood. The rafter roof is more traditional and more common with a concrete ceiling, the truss roof is the "local champion" in the GU city villa market segment with a hip roof and "does not need" the concrete ceiling. Where do you see their advantage in your case?

Exactly. The concrete ceiling does not span this width in one go and needs load-bearing walls - which in turn preferably stand above other colleagues. You can deal with the situation that it’s not practical to place those everywhere. But that then causes additional expenses (beams, increased steel reinforcement needs), so you should be sparing with that.

More skillfully, a load-bearing wall in the upper floor would not stand between parents and child 2, but between child 1 and the stairs, and on the ground floor I would reinforce the side panel of the wardrobe and the wall section between the front door and the wardrobe window as well as, where only a symbolic line separates the areas of the wardrobe and hallway, provide a beam. Then the load-bearing wall between parents and bathroom is not an "orphan" (as typesetters would say). Likewise, the one between living room and stairs would then not be a "widow".

Where exactly should the chimney go (in which "corner"), it’s still pretty tight in the plan (?)

Oh dear, thanks for the hints. We will reconsider that.

The chimney is here:

But we are getting a concrete ceiling on the upper floor.

Are you absolutely sure about that? Why should you get a concrete ceiling on the upper floor? In my opinion, that would be a complete waste if you are not building 3 floors.

Are you completely sure about that? Why should you get a concrete ceiling on the upper floor? In my opinion, that would be a pure waste if you don't build 3 stories.

Yes, because that was one of our special requests.