Floor plan design, 2 full floors, approximately 130-140 sqm without basement

A lot of drywall still needs to be installed to lay all the water pipes, etc. They alone take up about 20 cm in width. It will be very tight in both bathrooms. I would combine them.

Not necessarily. Pipes and tubing can also be installed inside the wall.

As a layperson, I find the children's bathroom silly. I could still understand an extra toilet on the same floor, but relocating the children to the bathroom on the same floor seems expensive and exaggerated to me.

We are currently discussing whether to remove the children's toilet and rather have 3 children's rooms.

Oh dear, you're right: those are the windows, the doors are planned even narrower. Well then, have fun. The chubby grandpa just can't use the guest toilet. Definitely plan the outdoor toilet in the garden already for some more stout visitors!

Are you serious? As a layman? What can he do there

I meant: I, as a layman, would be ashamed to present something like that – even if you are just a symbol slave, the shame should be even greater. It was not referring to the OP.

As a layman, I find the children's bathroom silly. I could still understand a separate toilet on the same floor, but outsourcing the children to the bathroom on the same floor, I find expensive and exaggerated.

I have a minimalist children's bathroom and parents' bathroom directly accessible from the bedroom. I think it's a great idea. Even after 18 years. Or especially when the kids are older.

I have a minimalist children's bathroom and parents' bathroom directly accessible from the bedroom. I think it's a great idea. Even after 18 years. Or especially when the kids are older.

Thanks, do you perhaps have a sketch?