Floor plan semi-detached house - Planning bathrooms and laundry room

Hello,

we have a plot with a neighboring house, to which we would like to build on as a semi-detached house.
I am currently specifically working on the bathrooms and would appreciate feedback. The exact questions are explained further below. In the attached floor plans, the last change was incorporated as a red drawing, which is why there is a hole in the upper floor at the “old” bathtub location.

Development plan/restrictions
Plot size: approx. 450 sqm
Slope: no
Floor area ratio
Floor space index
Building envelope, building line and boundary
Edge development: carport/garage
Number of parking spaces
Number of floors 2.5
gable roof 45 degrees
Style direction
Orientation
Maximum heights/limits
Further requirements: extension to an existing semi-detached house; total plot width: 11m; therefore maximum house width 8m & house depth 10m

Requirements of the builders
Style, roof shape, building type: roof shape and size oriented to the neighbor
Basement, floors: no basement, 2 full floors, 1 attic floor
Number of persons, age: 4 (37,36,3,0 years)

Space needs on the ground floor: dining/living room/kitchen, utility, guest bathroom, cloakroom
Upper floor: 2x children’s rooms, office 1, bathroom plus laundry room
Attic floor: bedroom, bathroom, office 2/guest/living 2.
Office: family use or home office?: both, 2x home offices necessary

Overnight guests per year: various, 8-10
Open or closed architecture: partly partly
Conservative or modern construction method
Open kitchen, cooking island: preferably a semi-docked island, even if the kitchen is somewhat tight
Number of dining seats: 6-8
Fireplace no
Music/stereo wall
Balcony, roof terrace: terrace
Garage, carport: yes, also as basement replacement
Utility garden, greenhouse: no
Further wishes/special features/daily routine, also reasons why this or that should or should not be

House design
From whom is the plan:
-Planner from a construction company: yes

What do you particularly like? Why?
Implementation of the ground floor, equally sized children’s rooms, the attic is also okay. -> Comments are still welcome.

What do you not like? Why?
The bathrooms on the upper and attic floors are still homework for us.
Laundry is to be done on the upper floor, hence the wish for a sight-protected laundry area connected to the main bathroom. The washing machine/dryer should be elevated, so preferably not placed under the window.
There have already been several drafts with passages at the top/bottom of the plan. The current idea is to move the bathtub to the attic, using the space gain to widen the laundry room to 1.6m to allow for some storage space.
Attached is also a separate DIY sketch from me (without technical elements/piping etc).

In the attic, the bathtub is to be placed under the sloping ceiling. Is it usable in this room concept? Other ideas for the arrangement of the sanitary fixtures? Would you design the shower as drywall with a glass door or completely as a glass cabin (more light, but more cleaning effort)?

Another topic: what do you say about the kitchen and the possible orientation of the furniture/semi-island?

If you had to forgo, which details/extensions
-could you do without:
-could you not do without: bathtub preferably not completely omitted

Why is the design the way it is now?

Our wishes were implemented by the planner in several iterations.

What makes it particularly good or bad in your eyes:
For the relatively narrow plot and semi-detached house format, there are many fixed key points given, so there is little room for maneuver, but I always hope for creative solutions.

we have a plot of land with a neighboring house to which we would attach as a semi-detached house. I am currently working specifically on the bathrooms and would appreciate feedback. I have explained the exact question further down.

That goes too fast for me or seems to have jumped too far conceptually.

further specifications: extension to an existing semi-detached house; total plot width: 11m; therefore maximum house width 8m & house depth 10m [...] style, , building type: roof shape and size are based on the neighbor

I suspect that this is being "refined" on the basis of insufficiently reflected conceptual considerations. Show the neighboring house in profile. And explain the situation regarding foundation / underpinning and the like.

Do you like the draft like this? I mean, it's 8 meters wide. I have the feeling that there is more to get out of it than a floor plan that resembles 6 meters?!

Do you like the draft as it is? I mean, it is 8 meters wide. I have the feeling that there is more to be made out of it than a floor plan that reminds of 6 meters?!

We are open to all suggestions, we haven't built very often (never...) An additional info: We are working with the condition that the house can be used as 2 separate residential units (even if this is not planned currently). From this it follows that the technical room must be accessible separately; the ground floor could be separated into one living unit (- access to the guest WC would be possible through the kitchen and a mini-vestibule; an entrance door can be installed respectively in front of the staircase and living-dining area). These requirements are unquestionable.

Oh. Genuine and full separability changes quite a bit.

haven’t built that often yet (never...)

well, that’s why you look at options to see what could be done on 8x10. Model houses, houses and apartments of friends, virtual tours from house providers … but if needs don’t want to be awakened, that’s fine too.

We are working with the condition that the house can be used as two separate residential units

Who sets that condition?

Ground floor could be separated as one living unit (- access to the guest WC would be possible through the kitchen and a mini-vestibule;

And who gets to enjoy the mini WC then? No, honestly, who is the ground floor supposed to be for? The pictures are fine for a quick look. Dealing with the bathroom and stuff honestly hurts my eyes :(