Planning the dream house after shocking calculation

Hello everyone,
after several attempts we have finally planned our house (1.5 stories plus basement) with the dimensions 9.5m x 12m. The floor plan fully meets our expectations. Now the architect has done a calculation and brought us back down to earth ;).

We have discussed the calculation, but I still don't quite understand it. Especially the items roofing work 15TEUR, drywall construction on the upper floor 9TEUR, and then the heating (gas heating including chimney + radiators in the basement and underfloor heating on the ground floor and upper floor) 45TEUR. Oh, and the shell construction was calculated at 95TEUR (all net).

The house should be built near Darmstadt. What do you think of the plan and the calculation for the trades?

Explain a bit about your situation? Why 2 large bedrooms (ground floor and upper floor), why 2 walk-in closets? How many children and how old? What is the total area, do you have exterior views? What is planned for the basement, besides the technical room.

The first thing that strikes me spontaneously is that the hallway on the upper floor is very dark and narrow and that on the ground floor there is no storage space for brooms, vacuum cleaners, and other small items. The hallway on the ground floor also seems quite small to me. The guest bathroom seems too small in relation to the bedroom on the ground floor, if you were thinking about age-appropriate living.

That’s what immediately catches my eye.

On the upper floor, I notice that all doors open directly against the wall. This causes you to lose space for wardrobes, which surely doesn’t matter in the master bedroom since there is enough space, but it does in the children's rooms. The two niches (for the wardrobe) also limit you a lot. What if the 1m wardrobe is not enough and the children would prefer a bigger one? You don’t have other placement options for the wardrobe due to the sloping roof and doors/windows. For child 2, you also immediately run into a wall when you open the door. The window in the basement under the kitchen, how is that supposed to work if there is the wall projection above it? That doesn't make any sense. Why do you still need a third bathroom in the basement?

On the upper floor: I find 2 doors directly in the stairwell unfortunate, it poses dangers. Cloakroom on the ground floor too small. Hallway too narrow. I also ask myself the questions from (toilet in the basement, sleeping on the ground floor, 2 dressing rooms). That just costs. In comparison: others skip the basement, have no separate room on the ground floor, instead have a utility room and are content with 14 sqm bedroom + 6 sqm dressing room. As I see it, sanitary objects are also included in the heating calculation... so apparently it becomes quite a sizeable number. Sorry if I don’t take the time now to add up the sqm to get an average price ;)

Good evening

... and the calculation for the trades.

Quite "haphazard"

Rhenish greetings

What is actually your question?