Bathroom planning 7.12 m² guest WC / 5.02 m² black and white bathroom / 7.19 m² bathroom with shower

Hello everyone,
our construction project is becoming more concrete, we are now moving on to bathroom planning.
The forum has often given me inspiration, maybe you have some good suggestions for our bathrooms?
Attached you will find the floor plans from our architect’s approval planning.

Here are a few comments, the dimensions, and my questions to you:
Bathroom ground floor:

[*]For customers and as a guest WC
[*]If possible with a shower
[*]Long side: 3.80 m
[*]Short side: 1.875 m
[*]Doors can be repositioned
[*]Door from office to WC is a "nice to have," not a requirement
[*]Window cannot be repositioned

How can we fit a shower in the room?
Does anyone have experience with bathrooms with 2 doors? That is rather unusual and we have not yet come up with a good idea regarding the unfamiliar locking/unlocking of two doors.

1. Bathroom upper floor:

[*]"Children’s bathroom," therefore with a bathtub
[*]Long side: 2.79 m
[*]Short side: 1.85 m
[*]Door can only be repositioned to a limited extent, window cannot

The wall on the left can still be moved about 5 cm so that the bathtub and window align flush.
Do you have any ideas where storage space could be created?
We would also like to install a shower partition on the bathtub so it can be used as a shower.

2. Bathroom upper floor

[*]"Parents’ bathroom" next to the bedroom. Preferably a walk-in shower
[*]Long side: 3.78 m
[*]Short side: 1.90 m
[*]Door can be repositioned, window cannot

We are still completely undecided about the layout - do you have any suggestions?

Thank you very much for your thoughts and your feedback.
Best regards

Just a dumb question: Why does a customer restroom need a shower? If you have overnight guests, they can also use the children's bathroom. I would save the space and money, just like the door from the office to the restroom.

I always find a bathtub with an integrated shower lame. I had one for years and hated it. But unfortunately, your space doesn't allow for more. Does the bathroom have to be that cramped?
Personally, I would let the bathtub be a bathtub and then just send the kids downstairs to shower if a shower absolutely has to be there.

Upstairs, I would put the sink directly to the left of the door. But that's a matter of taste.

Thank you very much for your quick response. The idea was that my husband (craftsman) doesn't have to go through the whole house to take a shower, but rather has a short way after work. If we want to install a shower on the ground floor, where could it go? At the moment, only the space in front of the window is free. I imagine that to be rather impractical, or is it more common? The bathroom upstairs unfortunately already has the maximum size, anything more would be at the expense of the children's room. But the hint is good – if we install a shower downstairs, we probably won’t need a shower-bathtub combination upstairs.

For the others:

I now see a shower with a glass partition directly in front of the window as unproblematic. The door from the office is nonsense.

The door from the office is nonsense.

I agree. And while you’re at it, paint over the direct external access to the office as well. Both doors save exactly no distance but destroy even more wall space. And they cause problems (locking and unlocking two doors) or paranoia (an office room with THREE doors, really?).

I agree. And while you’re at it, when removing those, go ahead and remove the direct access to the office from the outside as well. Both doors don’t save any distance at all, but they do ruin usable wall space. And they cause problems (having to lock and unlock two doors) or paranoia (an office with THREE doors, seriously?)

I feel the same. 11 sqm is really unsuitable for 3 doors. You can’t work peacefully at all with so much flow in the room.

I always find a tub with an integrated shower unpleasant. I had one for years and hated it. But unfortunately, that’s all the space you have.

It’s not that bad. We have it too because I never found it bad.
And you can expect the kids won’t complain about it either.

Parents’ bathroom: move the door to the right side of the plan, then it fits.

Thanks for your attention