Single-family house - Design planning - Request for feedback

Hello,
hereby I would like to create a new thread regarding the draft planning.

Previous thread: Single-family house - opinions on our draft
[url

https://www.hausbau-forum.de/threads/Einfamilienhaus-Meinungen-zu-unserem-Entwurf.25622/[/url]

Attached are the main points:

Base slab already existing: 12.49x12.49 m2 and 30 cm thick.
The base slab was checked for quality by an energy consultant and a structural engineer. --> No objections
Positions of the KG pipes are marked in the picture "Base slab-KG pipes".

The house is to be built on the already existing base slab. Demolition is not planned.

The house must be built as a ground floor + 1st floor with a gable roof with a 22° pitch.

Original application plan from the previous owner has been requested but is not yet available.
Own application plan from the architect is available --> but was rated as unsuccessful by most.

Negative points in the application plan:


[*]Ground floor + upper floor
[LIST]
[*]Staircase from ground floor and upper floor is not correctly dimensioned


[*]Ground floor


[*]Staircase unsuitable, requires too much space, entrance to the living area through the kitchen
[*]Passage garage-house does not fit due to the height difference


[*]Upper floor


[*]Staircase unsuitable, room layout and dark hallway + hallway width of 1.10 m
[*]Balcony across the entire house length
[LIST]
[*]See east view under the picture "View all sides"
[LIST]
[*]The balcony was extended because the upper floor protrudes 70 cm beyond the ground floor. Thus, the resulting nose was concealed. In the previous plan, the balcony was only above the bay window.

[/LIST

Own wishes:

The ground floor is pleasing and the room layout quite good. However, the half-landing staircase should be replaced by a variant that requires less space.
The staircase was placed in the center of the house to be able to create the desired rooms.

[*]Keep the technical room in the indicated position due to connections located at the turning bay.
[*]Keep the position of the front door as indicated --> access from the garage + guests parking in front of the garage
[*]Central staircase for short routes
[*]Type of staircase: corner, 1/4 turns, 2x 1/4 turns, straight staircase. A spiral staircase is not desired

[*]Modern house with open kitchen and living area
[*]Study room
[*]Guest WC with shower
[*]Pantry for freezer and food and drinks
[*]Large children's rooms --> preferably south side if possible
[*]Room for walk-in closet
[*]Separate entrance to the parents' bedroom and not through the walk-in closet
[*]1x parents' bathroom + 1x children's bathroom
[*]Small utility room (approx. 6-8 m2) on the upper floor for washing machine and dryer
[*]Tiled stove, whereby the chimney shaft should not go through the children's rooms. Preferably through the bathroom or utility room

------------------------------------------------------------------------

• Development plan/restrictions
Size of plot: Parcel 35, 775 m2
KFW 55
Slope: Yes
Floor area ratio: 0.35
Floor space index: 0.80
Building window, building line and boundary: see site plan
Edge development: No
Number of parking spaces: 2
Number of floors: 2
Roof shape: gable roof 22°
Style/direction: South - Southeast
Maximum heights/limits: Building size max = 14m x 10m + single-story extension length, max 10m depth max 3m

Client requirements
Style, roof shape, building type: gable roof, 22° pitch
Basement, floors: without basement, 2 full floors
Number of persons, age: 4 persons (3x F, 1x M), 40, 38, 12, 9

Space requirements ground floor, upper floor: Since no basement, the space requirement per floor is higher --> 90 m2

Office: family use or home office? Planned for home office, possibly later bedroom / guest sleepers per year: 6

Open or closed architecture: open architecture, at least tried on ground floor

Conservative or modern construction method: modern design

Open kitchen, cooking island: open kitchen with cooking island

Number of dining places: 1
Fireplace: yes, should be placed in the living room because the chimney should not run through the children's rooms.

Music/stereo wall: No

Balcony, roof terrace: Yes, no

Garage, carport: double garage with partition

Other wishes/special features/daily routine, also reasons why this or that should not be: photovoltaic system + possibly battery storage, active ventilation system with heat recovery, air heat exchanger, cistern

House design
Who is the planner: architect
- Planner from a construction company: No
- Architect: Yes
- Do-it-yourself: No
What do you like particularly? Why? Ground floor due to open design with large windows

What do you not like? Why? Upper floor layout

Price estimate according to architect/planner: ?Personal price limit for the house incl. equipment: 400 k€

Preferred heating technology: air heat exchanger with underfloor heating

If you have to do without, which details/expansions
- You can do without: battery

You cannot do without:
Why did the draft become what it is now? For example:
Standard draft from planner? No, ideas based on show houses + floor plans on the internet + architect

What is the most important/fundamental question about the floor plan summarized in 130 characters?

How can the house be better laid out?

Attached are a few experiments from my side, as I could not upload more than 10 files in the first thread.

Attached is an excerpt of the development plan valid for me. That is why the architect shortened the upper floor.

Is the base slab actually notched at one corner already? What are the exact dimensions there?

Hello, no it is not recessed. The base plate is square with the dimensions 12.49x12.49 m2

Can the garage also stand 1m away with a roof / corridor and stairs in between, or does it have to be directly attached to the house? Because of the height difference, I mean?