New single-family house 190 sqm (aiming for less sqm!)

In the upper floor there is basically only a labyrinth to be found.

That's exactly what I meant by "we've treated the upper floor stepmotherly." Because we are not convinced at all. The word "labyrinth" hits the mark. Upper floor "downsize" would be my motto, but I don't know the way there yet :)

Sometimes we get to enjoy an evening off, but not every day. Do you really find the open-plan kitchen so small? I was used to about 30 sqm, this one seems huge to me :)

For an open-plan kitchen, it’s not small, but in my opinion it’s not suitable for cuddling, relaxing, and switching off.
Who wants to chill on the sofa and look under the dining table at the same time?
Suggestion: Utility room upstairs, old utility room for the practice, and the smaller practice room as a chill-out area.

For me, the house is more of a practice where an open-plan kitchen was built on the side for private purposes. That’s how the attic floor came about.
Somehow it reminds me of my hairdresser who also has the open-plan kitchen next door. Or a holiday apartment at a practice.

Is your husband also involved in the practice? Who is the decision-maker in your marriage? I don’t see any private life there, even if there is a sauna. Sorry.

Yes, my husband is also a psychologist and will share the practice.

Who wants to chill on the sofa and look under the dining table at the same time?

True, the table is inconveniently placed there :)

Suggestion: utility room upstairs, old utility room for the practice, and the smaller practice room as a chill-out area.

Thanks! I will think about your suggestion!
Hmm... we basically need the utility room/laundry room near the entrance since we often have to wash the dogs/their dirty stuff in autumn/winter.

You can pursue the labyrinth approach more consistently ;-)
Consider leaving out the hallway between the bedroom and the dressing room. Then see how you can arrange the bedroom, dressing room, sauna, and bathroom side by side on the bedroom side and move the guest room to the opposite side. The new labyrinth would arise if access to the private wing led through the dressing room, left into the bedroom, and right into the bathroom, and from there into the sauna. The guest room on the other side would have more light, and the hallway around the upper floor could be reduced by about 50%.

Regarding the office / dog room:
We also have (only one) dog. Is this room intended to accommodate the dogs when work is being done in the practice?

The room can also be a kind of living room in which one can relax. Depending on how much stuff the office has, you could use the guest room for this – despite possible tax disadvantages.

So if a relaxation area is created upstairs, you can focus more consistently on cooking and dining downstairs. This then creates the possibility of saving space.

Utility room upstairs was also my second thought. If that doesn’t work, I would set up a spacious chill living room on the upper floor or maybe move everything upstairs and just make a small secondary kitchen for the terrace on the ground floor. Later on, completely divide into 2 apartments – one upstairs, one downstairs.

I believe you have completely forgotten your own life in the planning. Workspaces there, food there, dog salon there, bed there, dressing room there. Visitors there. Ok, sauna too, that was probably your dream. I miss coziness, retreat, visitors. And honestly: I can’t imagine that 2 patients like to meet in the waiting room. Or is that usual in group practices?