ᐅ Possible bathroom layout – distance between toilet and soil stack

Hello everyone,
we would appreciate an assessment, as despite intensive phone inquiries, we were unable to get an appointment with a plumber before Christmas.
We are currently planning our bathroom for our new build: The question is whether this layout (see attached image) is technically feasible in terms of the distance between the toilet and washbasin to the soil pipe.

It is important to know that below the toilet/washbasin is the open kitchen/dining area, so there is no wall. Therefore, the soil pipe cannot be located directly behind the toilet/washbasin.
The blue lines drawn represent approximately the walls beneath the bathroom. Is it possible to route the toilet waste pipe through the floor (below or within the screed?) to one of the "blue" walls? Or is this not advisable?

Thank you for your assessment! It would greatly help us at this stage.

Kind regards
johannes.spr

What is on the ground floor where the downpipe is marked? Is there no wall there? Is it not meant to be built as shown in the drawing?

ypg schrieb:

What exactly is on the ground floor where the soil pipe is drawn? Is there no wall there? Is it not supposed to be built as shown?

Thank you for the feedback. We received this suggestion from our bathroom planner. However, I had some doubts about the drainage of the toilet (hence my post/question).

There is no wall on the ground floor, but rather even a window :-/. The soil pipe cannot be where it is drawn. That is quite amateurish on the part of the bathroom planner.
However, we actually like this arrangement quite a bit, so the question is whether it would be possible to route the soil pipe through one of the blue walls, or if that would be unrealistic.

It depends on the exact floor structure of the intermediate ceiling. But in principle, it should not be a problem as long as it is high enough.

Tolentino schrieb:

It depends on the exact floor structure of the intermediate ceiling. But as long as it’s high enough, it shouldn’t be a problem.

To my knowledge, a drain pipe isn’t laid crosswise and wouldn’t fit into the screed either. I see the blue intersection point at the window, but the pipe would also need to be vented...

I would wait until the specialists return from their vacation!
Without the ground floor and so on, this is mostly just guessing.

Well, it’s not great, but of course it’s possible. That was done in my case as well.

That’s why I said it depends on the floor construction.
But a DN10 pipe fits perfectly within 10cm (5 inches) of insulation mesh plus screed.
There probably won’t be a window on the ground floor there...