Thank you very much for your numerous replies. That really helps a lot. Below I would like to address a few points.
Remove the dressing room upstairs, instead make the bedroom a bit larger, which is currently cut off by the wall angle. The dressing room becomes a storage room. Without a basement, you definitely need this. Suitcases, vacuum cleaner, winter clothes, laundry, and so on. The small planned storage room can be removed entirely. Instead, a built-in wardrobe in the niche.
I see the following savings potential: Only one washbasin, why two? Why shutters upstairs?
Whether the dressing room is actually necessary, we will definitely discuss again.
We certainly need to rethink the second washbasin as well. (Costs an additional €650) I see the shutters as absolutely necessary in summer, at least from a thermal point of view. Am I wrong?
Hello Markus, why do you want to place your bedroom on the south side, although you will only sleep there? And put the children on the north side, probably also only with north-facing windows? In my opinion, that's not acceptable; the children should be able to spend time in their rooms during the day as well, without sitting in a dark hole.
I find the guest WC on the ground floor very problematic; there is hardly any space to store clothes dry during a shower. The access to the shower is quite narrow past the WC, and an outward opening glass door would probably be blocked by the WC; you probably need a solution opening inward or possibly a sliding door.
Cooking/eating/living I generally don’t find badly laid out, but the distance between sofa and TV at 3.5m might be near the lower limit.
Regarding the kitchen: If you want a proper island and not a peninsula as shown, you should already get a kitchen planned now. The current layout might be a bit too tight for that.
Maybe we are indeed a bit selfish there, but nothing has been finally decided yet.
Your comment on the guest WC will definitely be taken into account. In my opinion, a curtain is absolutely not an option.
I also find 3.5m too narrow, but we have not found a solution for that yet.
We will consult the kitchen planner once we are satisfied with the floor plan and the window configuration is set.
However, I would strongly recommend planning the kitchen concretely, because I find the position of the terrace door impractical and generally think there is too little window area on the south side of this open-plan room.
The dining table will still be rotated 90 degrees and will be 220cm long. The windows will definitely be changed or enlarged. Instead of the door, a 3m sliding element was discussed; I actually find that a good solution!?
And as it is now, all the wet rooms are on the north side. That makes construction cheaper: water, wastewater...
This question also came up for us. According to the developer, however, it does not affect the price if we do not stack the wet rooms. However, pipes would run through the kitchen if the bathroom upstairs is placed on the south side.
Does the material of the interior walls change upstairs, or why is the wall thickness there 12.5?
The design looks overall mature, but the wall structure doesn’t convince me: it looks like 24 cm masonry plus 7.5 cm adhesive insulation is planned. Milchschnitte
On the upper floor a metal stud framework with mineral wool as sound insulation is planned. Not good? We want to discuss this aspect in the next meeting, as we prefer a masonry upper floor.
The exterior walls consist of Poroton bricks + ETICS (polystyrene; I am actually not a fan) + plaster.
I would shift the partition between the utility room and the cloakroom/WC about 20cm to the right as per plan: the utility room does not suffer, the cloakroom gains an adequate wardrobe, and the WC gets a great shelf-washbasin from wall to wall: this can be realized well with a worktop into which a sink is integrated... or a countertop basin.
Very good idea. The access to the utility room would then have to be shifted accordingly, correct?
I think swapping kitchen and living room is even a must, so the living room gets more sun on the south side. But it will remain tight. Markus, is it possible to widen the house by 50cm?
I don’t see the swap between living room and kitchen yet. If the windows are enlarged accordingly, there should be enough light in the living room. Also, wouldn’t the kitchen be rather too dark then?
We have also considered the 50cm idea. We will discuss it; it will certainly be a budget question.