Single-family house - approx. 160 sqm - basement - hillside location

Hello everyone,

I would like to introduce you to our project.

Development Plan/Restrictions
Size of the plot 617 sqm approx. 20 wide x approx. 30 deep
Slope Yes. Rising to the south, about 3.80 m over the entire depth
Floor area ratio 0.4
Plot ratio
Building window, building line and boundary Minimum distance to the street 5 m, otherwise no requirements
Edge development
Number of parking spaces
Number of floors
Roof shape SD, WD, FD, half-hipped roof, PD
Style
Orientation
Maximum heights/limits TH 7.5 m and FH 9 m measured at the natural ground surface on the valley side
Additional requirements Cistern necessary

Client Requirements
Style, roof shape, building type Gently pitched gable roof
Basement, floors Basement and two full floors
Number of persons, age 4 persons (30, 29, 5, 1)
Space requirements on ground floor, upper floor
UG: Entrance/hallway, office, technical room, utility room, storage, garage connected to the house
EG: open living/dining area with kitchen, bathroom with walk-in shower,
OG: bedroom, 2 children's rooms, dressing room, 1 bathroom with shower and tub
Office: Family use or home office? Office with guest bed/guest sofa
Overnight guests per year <5
Open or closed architecture open
Conservative or modern style modern
Open kitchen, kitchen island open kitchen with (freestanding) kitchen island
Number of dining seats 6-8
Fireplace no, possibly provision
Music/stereo wall no
Balcony, rooftop terrace no
Garage, carport double garage in the basement connected to the house
Utility garden, greenhouse no
Additional wishes/special features/daily routine, also reasons why this or that should or should not be

House Design
From whom is the design: Do-it-Yourself, architect (sketches)
Previously a design from an architect, elements were adopted from it
What do you particularly like? Why?
What do you not like? Why?
Price estimate according to architect/planner: 450,000
Personal price limit for the house, including equipment: 500,000
Preferred heating technology: air-to-water heat pump, possibly geothermal

If you have to do without, which details/extensions
-can you do without:
-can you not do without: generous kitchen and dining area

Why is the design the way it is now?
So far it has been quite a long process, as general floor plans found in show homes and on the internet, as well as cubatures and wishes for this plot, were not expedient. Initially, conversations took place with architect friends. They produced the first sketches (see attachment; sketches oriented north) and gave crucial tips on orientation etc.
Due to the slope, a basement is advisable. This "looks" out of the ground on the street side. Neighbors often have the garage in the basement, so these were our first ideas as well, which were discarded again due to the space required for an office. The entrance area is still planned in the basement on the street side.
The photo roughly shows the neighboring buildings; unfortunately, there are no plans that show the development. Since the neighbor to the south is relatively close and tall, our main orientation is planned to the west (also better long-distance view).
The garage should be walkable or serve as a terrace and partially planted (cost factor?).
The ground floor should cantilever somewhat above the basement (cost factor?), to structure the facade (model photo).
My concern mainly relates to the ground floor layout.
What stands out to you or what would be suggestions for alternatives? How do you see the differences between the two designs?
We are quite open about the design of the staircase; the sketch shows a straight staircase, which takes up considerably more space.
The client wishes for a laundry chute; where could this be integrated?
The majority of the windows and the bathroom furnishings are placeholders, so please do not assign too much importance to them.

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

Comments and further suggestions on the floor plan, especially on the ground floor. The basement and upper floor will be adjusted accordingly.

Best regards

The ground floor should cantilever slightly over the basement (cost factor?), so that the facade is articulated (model photo).

Then the house will look like a stack of differently sized shoeboxes just like the current model. Is that what you want?

Maximum heights/limits TH 7.5 m and FH 9 m measured at natural ground level on the valley side

Isn't it higher on the valley side? Isn't the basement counted? ?

Small excerpt from the development plan.

Without having stood in such a room oneself: Is there not the danger that 5*12 m will feel "tube-like"?

Small excerpt from the development plan.

Is the solution there? Where I am, I cannot enlarge attachments.

Without having been in such a room myself: Isn’t there a risk that 5*12 m will feel "tube-like"?

You should zone it well and possibly work with a chimney or built-in cupboard, partition wall, or something like that.