I find the technical planning (by you?) less good now.
Basically, I find the house design nice and spacious. A nice starter home, where you might later, if the children and parents need more or different things, separate and look for something else.
Houses evolve with time, and nowadays everything is just smart: one kept as minimal as possible, another again spacious and not as fussy as older semi-detached houses. You no longer do hobbies indoors, nothing is stored anymore. Both have their reasons for existing.
The kitchen appears open and bright. There is space for a cloakroom, and a multi-room too. What more do you actually want besides a very spacious living area?
About the neat balcony, I won’t say anything. It won’t be given to you for free. But it does look impressive.
I would definitely not make the hallway bigger and make the room accessible only from the living area.
I would remove these two short walls in the cloakroom and in the kitchen and continue the built-in cupboards in the hallway by 90 degrees until they then run another 90 degrees into the kitchen line.
Regarding the bathroom: I am not a fan of forced T-shaped layouts. Usually, you ruin the room with the extra walls. Maybe generate the shower in an L-shape instead.
11 sqm can be enough for a child's room. However, one must be aware that there simply is no space for placing furniture so easily. The bed is 80? wide.. In comparison, the 22 sqm for the parents, whether with office or dressing room, is quite decadent. At the latest with the second child and a schoolchild, you will be rotating. Then you squeeze yourself and your double bed into one of the children's rooms. At least, I would plan for that. Or else try to move a few walls already now.
By the way, a workspace can also be well accommodated with a laptop in a wall cupboard or on wheels under the stairs.
Thank you very much for your effort.
Sorry. I could have told you that a gable roof with an unheated attic is being built. Only the exact roof pitch etc. are not known to me.
You have understood everything so far correctly. Currently, there are no two children yet. The thought was that we would prepare everything by then and only use the second office as an office when it is really necessary. We had considered using the room as a storage room until then.
The planning with the technical room comes from the architect; we have not taken/had any influence on that (except for relocating the washing machines).
The only storage space for cleaning supplies and bulky goods (beverage crates, etc.) is the crawl storage and under the stairs, since it is a concrete staircase. Therefore, we did not consider this space as a workspace.
To what extent would you make changes to the walls in the upper floor?
In the end, this already helps me. Many of my worries are shared because some “problems,” like the insufficient storage space, were already known to me. So far, we have been able to introduce changes/wishes but are still considering whether this could be a permanently satisfying option or if we should rather look for something else. Only that is not so straightforward here in southern Germany.