Relocate the bathroom to another floor or make the best of it?

Hi,
I am interested in a house. However, the bathroom is too small and downright ugly. I would like to move the bathroom to the upper floor. However, there are no water pipes on the upper floor, as there are only 2 bedrooms there. The room is also not above the bathroom, but on the other side of the house.

What additional costs would I have to expect for the bathroom if I have all the necessary pipes and connections moved upstairs?
Also, it is a semi-detached house. Because of the sloping roof, at least the shower would have to be on the wall next to the neighbor. Is that somehow a problem?

Or does anyone have an alternative idea how I can fit a bathtub and shower into the existing bathroom of 3.5m x 1.4m? The only thing I can think of is a corner bathtub with an integrated shower, but the bathroom is laid out in such a way that there is a door and a window on the short sides. In other words, the window would then be in the shower.

Best regards

You mean: The window would then be in the shower.

Best regards

Is that so? Everything is possible! When buying a house, other things should be more important, e.g. the condition, which an expert can examine and evaluate.

For such minor things as bathroom renovation or relocation, a specialist can then have fun. Prerequisites always: a house and sewage plan! Without this, it won’t work even in a forum :)