Bathroom optimization needed

We only have a 1.40m walk-in shower and I don't have wet socks. Isn't your slope incorrect?

Yes. We have about 1.2m with a door and it splashes quite a bit up to 1.5m height (with rain shower). But it’s also about the path out of the shower. Having a towel nearby is important.

And I'll say this: it also very much depends on who showers how :)

PlanRechts is the floor-to-ceiling window...

Is it no longer possible to redesign the windows? What does the view look like? The long wall where something could be placed but is "blocked" with a floor-to-ceiling window is a bit impractical.

Is it no longer possible to change the windows? What does the view look like? The long wall, where you could put something with floor-to-ceiling windows "built in," is a bit impractical.

For towels, we would install a small shelf and store the towels rolled up. The rest will be stored in the cabinet under the washbasin...

I would have to talk to the general contractor to see if windows can still be moved.

I just tried an online bathroom planner. The manufacturer is Vigour. So the fixtures are correctly scaled...

In my amateur opinion, the original plan should be sufficient? Hmm!

We would only want to attach the showerhead to the partition wall (Is there a minimum thickness for how thick the wall must be? Or is 11.5 cm calcium silicate brick enough?)

The bathtub is 1.70 m long and 75 cm wide at the widest side.

The washbasin is 1.20 m wide.

Then we would still have a 90 cm seat for the toilet...

Yes, it's okay as it is. The shower is just pretty tight or cramped, when you look at the measurements from your planner. For the small room, I simply find a solid wall without glass too oppressive. I wouldn't do that.

You should definitely try lying in the bathtub. Before its dimensions and the slope of the backrest don’t suit you and it will never be used, I would save both the money and the space for it.

We would only want to attach the showerhead to the partition wall

Why? Then you have even less space and the water splashes further. If the outer wall does not allow the shower to be mounted, you can still build up a wall there.