ᐅ Converting a children's room into a bathroom

Hello, we want to convert the current children's room in our house into a bathroom, if possible. Right next to the children's room, there is already a guest toilet, so theoretically, plumbing lines are nearby. It might be possible to create an opening in wall (1) of the guest toilet to combine the spaces into one room. Alternatively, we could keep the guest toilet as is and install an additional toilet in the new bathroom (if feasible).

In the resulting bathroom, we plan to have a shower at D, a washbasin at W, and a corner bathtub at E. Additionally, a washing machine connection should be installed in the bathroom. Our question is: is this even possible? What exactly would need to be done (cutting into walls, laying supply and drainage pipes, etc.), and what would be the approximate costs? Our main concern is the installation of the necessary plumbing for supply and drainage.

Can the connections only be installed on the wall where we have currently marked the fixtures, or could the washbasin, for example, be installed on the opposite wall? Please see the plan...

Best regards,
Michael

Hello Michael,

Is the wall where the shower, washbasin, and corner bathtub are to be installed an interior or exterior wall?

What is the wall thickness?

Best regards,

Dirk