First house design and floor plan - your opinions are requested

I also like it. What might be a bit small is the wardrobe and also the transition from the entrance area to the hallway. For the kitchen planning, I would still go to the corresponding forum, or maybe will still get in touch.

I would definitely add a shower to the ground floor. Maybe there will be more Chihuahuas or other creatures or future situations where having a shower on the ground floor is very convenient. Who knows what life still has in store..... The distance between the counter and the sink in the kitchen seems very spacious to me.

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Due to the planned two children's rooms and your related response to another forum member, in my opinion you might consider whether the guest toilet on the ground floor should still be equipped with a shower bathroom.

The site plan doesn't get me any further...

Otherwise, I also like the floor plan. However, small things bother me that could annoy you in everyday life. The vestibule is too small for a family. Apart from the small corner, there is no wardrobe at all. There is too little storage space. Kitchen planning could become tight: if you give the island enough (at least 90cm) depth and extend it to the work surface at the top of the plan (about 120cm... depends, right now it's too far away), the access will become too narrow. The staircase could use a large window, which would also benefit the hallway upstairs. Swap the toilet and shower: the toilet rather needs natural light, the shower less so because of modesty and the neighbors. I think the dressing room is well done, which is really rare here. The children's rooms are generally good too, but they have too little space. The south windows are almost a bit too generous, letting in quite a lot of heat. They should be somewhat smaller on the south side. With the staircase window spanning two floors, the façade should look better as well. The east side is mega boring; it lacks excitement. I don't like the missing alignment on the right side of the south. Personally, I would skip the T in the bathroom, and in the kitchen, I would remove the wall with the two tall cabinets, arranging the tall cabinets as a row of three next to it. That would look much more open and ease the bottleneck with the right island depth (see above).

3.40 as the chill room width is a challenge... with a new sofa plus footrest, you’re already at 180-200. That leaves a remainder of 140/160... no yoga in there, but that’s not necessary. But as you say: What isn’t maybe still will be ☺

Access to the shower is about 50cm too narrow. For the T, I find the bathroom too narrow.

2m wide utility room is very, very narrow. The entire technology including the installation zones of the various media should be drawn in there. In front of the electrical panel alone, there usually needs to be 1.2m of space. Then there is the washing machine + dryer and also a passage room to the garage.

In general, I would lack storage space.

I also find it quite nicely solved.

Notes though:
Living room width under <3.50m would be too narrow for me.
Hallway actually quite wide - but still too little space for a wardrobe, especially if you think about children. The mini-wardrobe is just enough for the kids' clothes.
The area on the ground floor marked as "Diele" is somehow unnecessary. In my opinion, it would be good if you could allocate the square meters to other rooms.
The dressing room looks really good! When I compare the wall measurements with a standard Pax, the furniture there doesn't seem to be 60cm deep. Pax with sliding doors, I think, is 66cm. Measure the furniture. They all look a bit shrunken, gut feeling.
Bed or space next to the beds for "maneuvering" might be a bit tight. Also sketch in your desired bed there. Basically, though, a nice solution.

I have the feeling that the house could be a bit wider, about half a meter. That then would be added to the living room and children's room or bedroom.