modern Bauhaus, lots of glass, 170 sqm ground floor/upper floor, currently in phase 3

What exactly is included in €92,000 for "planning"? That is an exceptionally proud amount for the construction shown.

Here we probably won’t agree. Your statement essentially means that development is not desired and that the corsets of the past must also apply to the future. That simply can’t be right.

Well, what applies to you can be clarified. Or rather, I assume anyway that there has already been a preliminary building inquiry as to whether such a house is permissible in the area.

I like the property, even if it really won’t fit in with the surroundings at all. I find the tiles on the upper floor irritating. Is there a particular reason for that? I never wanted that in the bedrooms and children's rooms. So I'm just asking out of curiosity :-)

Color styles are not yet final.

I think you are more concerned about the exterior appearance than the interior...

As already mentioned here, you should definitely better describe your individual situation so that meaningful comments can be made about a suitable floor plan. Does your wife go to sea and is gone for 6 months, or are your 3 children going to move out within the next 6 months anyway because they are triplets? Is the office rather just for sticking a stamp on a letter, or is office work supposed to happen there???
Your utility room will be a space packed with technology; the two letters "HW" don’t really fit there. If all five of you were to live there longer, the shower situation would be too tight for my taste.
I am not a fan of storage space at all; for a while I had 6 moving boxes stored somewhere and was on the move. But if you live permanently and fixed somewhere, it will be a bit more, even if you are not a collector.
The architectural style promises generosity, but with 170 sqm for five people, it is already a less generous situation. I would have rather envisioned a pitched roof solution with usable space upstairs, be it for storage or a studio, simply a bit more flexibility.
50 sqm for kitchen/dining/living is not really much for five people; of course, it is sufficient, but given the considerable additional costs for the construction method, I would have allowed myself more space there. At the latest when you actually draw in the furniture mass, you will see it that way.
We are now also building a gable roof again because it was required or could be approved without any problems, albeit with some deviations.
Unfortunately, in my opinion, too much value is actually placed on the exterior, sometimes even with architects, whereas the inside is your house, where you live and want to feel comfortable. A fancy exterior can be created a thousand times over, with any roof shape.
I would leave out everything that makes it expensive on the outside and invest it inside: stairs, storage, living space, etc.
By the way, where is the staircase priced in?

I think everyone has their own taste. I can imagine that the house will be nice in the end. I also have a question about the planning costs; 92000 seems incredibly high to me. Let's say it is set at 11 percent of the construction cost for the house, which means in reverse you are calculating over 900000 for the 170 sqm. That also seems very high to me.