Positioning of stair shaft in floor plan

Thank you for the comments on the wall design. The architect drew it that way, I think it's good. How would you do it?

Thanks for the comments on the wall design. The architect drew it that way, I think it’s good. How would you do it?

As long as you like it, everything is fine and so on. It stands out because it was used earlier as a design element – nowadays still often in very small houses so that you can enter two rooms from the hallway. But contemporary design is straightforward. The staircase would also be more comfortable with straightforwardness, meaning 90-degree corners, as there would be more area to walk on. Is the architect over 60?

Is the architect over 60?

If eighty is the new sixty, then probably yes ;-)

I have once "tidied up" the ground floor, as I do not see the moral value of the slanted walls and the "light-flooded dirty corner" between guest room and pantry. Bundling the risers for ventilation stuff and automation stuff into one run is, in my opinion, more counterproductive than (for what?) advantageous and would probably mean pulling a box under the ceiling somewhere between points "2" and "3" roughly in a cross-section of 30/20. The best point would probably be near "1", but technically on the room side of the wall to the hallway. Above the ceiling of the ground floor, I then envision the ventilation ducts advancing towards the "room above the WC" and towards the "room above the pantry", while the automation and other electrics each march under the ceilings towards "3".
All this needs to be planned early, see also and as a warning example—not least for the idea of overbundling—in

while sich the automation and further electrics each advance under the ceilings to "3".

Ceterum censeo, the four minutes should finally be raised back to ten minutes!

Thank you very much for the drawing!
Unfortunately, we would lose our small niche where a wardrobe was supposed to be placed.
In my opinion, this can only be reasonably accessed if the adjoining wall to the guest room is slanted.

I find the advantage of the slanted walls is that you don’t lose any room space; honestly, I wouldn't know how to solve it differently in the upper floor than with the slanted walls. But I am open to suggestions. :)

My floor plan-trained eye sees

Unfortunately, we would lose our small niche where a wardrobe was supposed to be placed.

a niche that is good for a plant or decorative stuff, but does not work as a wardrobe for 4 people.

I find the advantage of the sloping walls is that you don’t lose any room in the rooms,

On the contrary, you lose a corner with every slope, since furniture is built at 90 degrees. With every sloping wall, you will have one or two lost corners. Dust-catching corners.

Honestly, I wouldn’t know how else to solve it on the upper floor other than with the sloping walls.

The designer (or architect here) should plan properly with 90-degree corners. Then there are reasonable areas where a good wardrobe fits, the staircase gets enough space, and upstairs works without them. Why do other architects manage it and yours doesn’t? As already said: if necessary, you can take half corners, but don’t make a virtue out of it.