Floor plan design single-family house (190 sqm) with garage

Upper floor:
I would try to plan the bedroom with its own door (niche into the bathroom or something) so that a 2m wardrobe can fit there if necessary, allowing the dressing room to be used as a separate room if needed. I would then omit floor-to-ceiling windows in the dressing room.
If the bathroom remains the same or similar, I would provide additional washing machine/dryer connections directly behind the door.
Double casement windows, especially in the bedroom, are not necessary; consider external shading for the south side. We do not have a single double casement window in a similar upper floor.

Ground floor:
I would enlarge the living area at the expense of the hallway and bathroom.
I find the orientation good.

Hello everyone,

I have done a bit of work in the online editor and made the adjustments.

Basically, I like a T-arrangement (WC/shower) in the upstairs bathroom. However, I have not yet found a good solution for laying the wastewater pipes (shower, WC, sink) in the utility room in a reasonable way, without them having to run completely across the room at the ceiling once. To circumvent the problem with the 2 m limit, I have installed a wall about 2 m high. Behind it, a small recess could possibly be realized. The depicted line serves as a marker where the full room height is reached.

Do you have any ideas / suggestions on this?

Would swap kitchen and living area. Sitting in the open corner at the back is uncomfortable anyway. The kitchen fits much better there. In the separated lounge at the back, it’s nice and cozy. While the children do their homework at the dining table and daddy cooks, the stressed mother relaxes on the sofa. ;)

Does anyone of you have any tips & tricks on how to avoid the drain pipes in the middle of the utility room running through the bathroom upstairs?

However, I have not yet come up with a good solution for how the wastewater pipes (shower, toilet, sink) can be properly installed in the utility room without them running completely across the room at the ceiling once.

Does anyone of you have any tips & tricks on how to avoid the drain pipes in the middle of the utility room running through the bathroom above?

How do you come up with that?
The drain pipe is best placed against the exterior wall in the utility room. On, not in.
The supply and drainage lines are laid under the screed.
It doesn't help if you plan the parking space of the electrical cabinet.
Please leave that to the professionals.
Your drawing may gladly serve as a sketch for the architect, who will also do the technical development.

how can the drain pipes in the middle of the utility room be avoided through the bathroom above?

I do not see where the concern would come from that some would have to be in the middle. Apart from that ...

Your drawing may gladly serve as a sketch for the architect, who will then also do the technical elaboration.

... that's how it is: a lot of soapy water still flows through the pipes until the execution plans come into play.