Main bathroom (10 sqm) with open shower, any ideas?

Sorry, I don't quite understand what you mean.
"next to the shower on the bottom wall of the plan"?

Or do you mean if the toilet would then be to the left of the bathtub? It could then also get a bit tight between the toilet and the bathtub...?

Have you now clarified whether relocating the toilet is acceptable? And then, if I were you, I would have it calculated once more how it would be with a classic tub of 180cm if it is placed diagonally or a corner tub in acrylic. These also have their reasons for existing, even if the installer talks you out of them.

Have you now clarified whether relocating the toilet is acceptable?

Yes, we were able to clarify that -> it would be possible.

And then, if I were you, I would have someone recalculate how it would be with a classic 180cm tub if it is set at an angle or a corner acrylic tub. These also have their reasons for existence, even if the installer talks you out of them.

180cm width would then be quite large (does it fit like that...?), I don't have the configurator at hand right now to try it out quickly. A corner bathtub would be very expensive (huge surcharges via the developer & general contractor).

Best regards & thanks!
Gatho

Or do you mean if the toilet were then to the left of the bathtub?

Yes, sorry, that's what I meant. Whether to the left or right of the tub is then a matter of taste.

Could it then also get a bit tight between the toilet and the bathtub...?

With the variant with a 170cm tub, that should work. 285cm (room width) - 170cm (tub) - 15cm (pre-wall) = 100cm for the toilet. That fits. With a tub of 180cm, it gets tighter.

Yes, that would be one option, but is 50cm of space in front of the toilet better than 50-55cm at the entrance to the shower? Unfortunately, neither is optimal.

Jochen's preferred option is unfortunately too expensive through our developer due to the corner bathtub.

More than € 1,600.00 ? Building expert on the go