Floor plan of a single-family house with basement and garage

@ 11ant: I will take another look at the issue of "too large bricks."

Aha, how and where then?

I planned the pantry and the dressing room to be the same size right from the start, partly so that walls would be aligned.

Which would be less of an issue with lightweight construction.

Aha, how and where then?

The most obvious option would be to talk to the planner again about the sense and nonsense of the drawn stone.

I like it, BUT you cannot arrange a kitchen like that if the room is only 3.33m wide.

Plaster off,
Wall row 60cm
Row spacing min 110 (because of the XXL dishwasher door)
Island min 90cm deep

Remaining 70cm on the back side of the island for walking through. In reality, it looks poor, an island that is almost right up against the opposite wall.

A single bar seat at the island end requires a space of 60x60cm

Better than the basement stairs in the living area. I think it's good.

Oh, I completely overlooked the basement stairs. Then my ground floor is also not feasible as it is.

The most obvious option would be to talk to the planner again about the sense and nonsense of the drawn stone.

A draftsman is not a planner, and the general contractor can – the thicker stones only cost him a bit more – show the customer that he is "a generous host who pours well beyond the calibrated mark." That lulls customers into not suspecting any cunning on his part. A cheap marketing trick with double effect, then. For you, the thicker walls on the ground floor simply "make no sense," but they don’t harm either. Upstairs, they turn into nonsense, which is why I also pointed you to two external posts (which are not permitted to be linked here, but as suggested you can easily find them yourself by googling). I would never plan the walls upstairs here so undifferentiated. Unfortunately, I have the impression that you do not recognize the nature of my warnings, and expect a kind of "scientific explanation" for the wall thickness, why the specialist here specifies the large calibers (and stone walls generally everywhere). He can provide you with that, I suspect "because we always offer a little more than we have to, and our competitors unfortunately do not." I have already explained the background to you here.

Oh, I completely overlooked the basement stairs. Then my ground floor is also not realizable as is.

Yes, it is. I assumed you had implemented my suggestion here to do without the unnecessary redundant storage space.

Without knowing how the heating load calculation & TGA concept looks like, I think it would be quite presumptuous to assume that thicker stones (for exterior walls) are specifically pointless here. They do not only have a static function.