Cost estimate for building a single-family house in Bavaria BGL

Plan differently! Design.

Where you need them: Laundry, for example, on the upper floor, storage on the ground floor.

Nonsense. A basement is never an obligation. You plan technology and utility rooms on the ground and upper floors – that is called a basement replacement.

I'll take that with us to our architect.

Do you see any other screws we could turn?

For example, my contribution just now?

Would there be another saving if we built a visible roof truss or a high knee wall with visible roof truss instead of the cold roof frame?
Could we simply calculate the following savings comparing 11 to 9 versus 12 to 10?
20 sqm on the ground floor: 20 times €2200
20 sqm on the upper floor: 20 times €2200
20 in the basement: 20 times €1000.
So roughly over €100k?

I'll take this to our architect.

Cool. I guess he knows how to design a house. Ultimately, it is the wishes of the builders that make him design what it becomes.
So if you want to build with a basement, he will design a house with a basement for you. If you tell him: well, preferably without a basement because it's too expensive, then he will design a house without a basement according to your wishes. That's how it should be.
The house design itself, which you posted, is not exactly an art style – this variant exists in abundance, with a utility room and a technical room.

Cool. I think he knows how to design a house. Ultimately, it is the wishes of the builders that make him design what it becomes. So if you want to build with a basement, he will design a house with a basement for you. If you tell him: well, preferably without a basement because it’s too expensive, then he will design a house without a basement according to your wishes. That’s how it should be. The house design itself, which you posted, is certainly not an art style – this variant exists in abundance, with a utility room and a technical room.

Two points were ultimately decisive for us: - is the architect’s estimate too high? (I think that’s settled) - where could one sensibly save in order to get back into the budget? Here I take "without basement" and 11 by 9. Are there still large blocks at this point before the input planning? For example, the part regarding the attic, etc., from my previous post?

Would there be any further savings if we built a visible roof structure or a high kneewall with a visible roof structure instead of the cold roof structure?

That costs more. Quite a bit, because up to the point where the cold roof would be, it then has to be additionally insulated and drywalled. The slopes of the roof have a larger surface area than a ceiling.

That costs more. Quite a bit, since up to where the cold roof would be, it still needs to be additionally insulated and covered with drywall. The slopes of the roof have a larger surface area than a ceiling.

Yes, you are right. I just recalculated. You have to lower the knee wall on the first floor well in order not to increase the enclosed space (compared to the cold attic). However, our architect's estimate would go downwards, as he estimates based on gross volume and does not consider whether the attic is cold or warm...

The estimate of our architect would go down, because he estimates based on GFA

That doesn't matter how much he estimates. What counts is what you ultimately have to pay. Or do you believe that if you artificially make the GFA look better, the house will be cheaper?