Floor plan optimization single-family house 190 sqm living space. Self-planning

Development plan/restrictions
Size of the plot: 1006 sqm
Slope: Yes, facing north
Floor area ratio: uncritical, complied with (see site plan)
Floor space index: uncritical, complied with (see site plan)
Building window, building line and boundary: uncritical, complied with (see site plan)
Edge development: min. 4 m distance to the west, min. 3 m distance to the east
Number of parking spaces: 2
Number of storeys: max. 1.5 towards the street (see site plan)
Roof shape: open
Style: -
Orientation: ridge parallel to street
Maximum heights/limits: no prescribed ridge height, only eaves height up to 3.52 m

Requirements of the clients
Style, roof shape, building type: Bauhaus
Basement, storeys: 2 VG (UG living area)
Number of persons, age: 4 persons, ages: 43, 38, 5, 2
Space requirements on ground floor, upper floor
Office: family use or home office? Home office, family after work
Overnight guests per year: approx. 1 weekend every month
Conservative or modern construction: modern
Open kitchen, kitchen island: both
Number of dining seats: 6
Fireplace: yes
Music/stereo wall: YES, IMPORTANT. 5.1 + Atmos in the living room. Screen + projector.
Balcony, roof terrace: balcony ground floor
Garage, carport: double garage
Further wishes/special features/daily routine, also reasons why this or that should or should not be

House design
Who created the plan: architect available, but plan self-created. Architect
What do you like especially? Why? View axis in the vestibule, integrated case for screen, fireplace and kitchen in the living room, all on one level for the elderly on the ground floor (street level).
What do you not like? Why? Cloakroom too small (127 cm), workshop too small, office somewhat too large. Possibly too convoluted.
Price estimate according to architect/planner: €600,000 (architect estimates poorly so far)
Personal price limit for the house, including equipment: €650,000 (reserves available)
Preferred heating technology: brine-water heat pump (with passive cooling) with trench collector, controlled residential ventilation

If you have to do without, which details/extensions
-can you do without: T-solution bathroom.
-can you not do without: hi-fi living room, kitchen island, floor-level showers, double garage

Why did the design turn out as it is now?
I can't do better (layman) :-D. Unfortunately, neither can the architect (objectively viewed).

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Hello everyone,

here again SweetHome files (the professionals will probably be rolling their eyes already) but with the difference that probably more time was invested by me in the planning than usual for a layman’s draft.

The sad story:
I have an architect, but after 4 months of waiting she delivered only disappointing results. Although I asked for a detached design, the external dimensions were adopted and the rest was made worse by “improvements.” Typical example of no time and hastily done combined with little talent.

Then I went to a building consultant. The design proposal there—again a female architect—was once again catastrophic.

Then I lost trust in the profession and took things into my own hands. It seems to me there are many bad apples among architects.
I was somewhat confirmed in this, as almost without exception every architectural plan here in the forum is torn apart (but for me understandable from the explanations, thanks to the great forum participants!).

About the house:
All requirements of the development plan are complied with.
North is really at the top of the plans with only two degrees deviation.
There is a road to the north. Good view to the south. Large distance to neighbors in east and west.

For you, the undimensioned floor plans in the second post are probably least confusing (but are not quite up to date). Double garage is partially missing there.

Best regards and I hope for constructive improvement suggestions!

Here are the undimensioned floor plans (were later slightly modified) and the dimensioned floor plans:

Can you please upload the text version of the development plan here? If applicable, please provide instructions on how to access it online (no linking, please).

I could do it. But there's nothing in it except what is mentioned above. The building area is from the 70s.

4 m distance to the boundary in the west, 3 m distance in the east. 1.5 stories from the street. Eave height max. 3.52 m, no ridge restriction. Gable parallel to the street. Everything else is open. Due to the plot size of over 10 [Ar], everything is no problem.

Here are some pictures of the property and a survey

So first of all, hats off, I don't think it's that bad. A few points to consider:
EG:

[*]Guest WC without a window is always a bit of a pity. Would it be an option to swap the cloakroom and WC and open up the vestibule?
[*]Your bedroom is relatively cramped. I would take a few centimeters from the bathroom and give the bed more space instead.
[*]An open shower opposite the WC is usually a bad idea. I would redesign the bathroom and probably try to make it smaller at the same time.
[*]It feels like the kitchen and chill room should be swapped so you can step directly onto the terrace from the kitchen. It's just a pity because of the pantry. But that way someone is always running in front of the TV. That's really annoying, especially since you value peace so much. I would probably rather access the pantry from the hallway and then bite the bullet by having to walk 3 meters to get there.
[*]I can't make sense of the chimney's location. It's not in the middle of the room, is it?
[*]What do you do with a sink in the garage? Doesn't it freeze in winter?

UG

[*]Better to keep the recessed doors at Guest and Child 2 at the back. Otherwise, the hallway loses a lot of its aesthetics and cozy atmosphere. The other rooms gain nothing from it.
[*]Do you really need all those rooms under the garage? You quickly get the idea of integrating them into the thermal envelope and placing an office and bedroom there. In my opinion, there is still a lot of saving potential here if that becomes an option.

Otherwise, the budget topic is certainly still to be discussed. Less for the house itself, although that will certainly be a major figure. But the terrain modeling will swallow up a nice chunk.