Floor plan of a single-family house approx. 160m², hipped roof, with basement, hillside location

Development plan/restrictions
Size of the plot: 505m²
Slope: approx. 10% (3m decline over 30m length)
Floor area ratio: 0.3
Floor space index
Building window, building line and boundary: See excerpt from development plan
Edge development
Number of parking spaces: Double garage
Number of floors: 2 full floors
Roof shape: Hipped roof
Style: Townhouse
Orientation: Terrace / garden faces southeast
Maximum heights/limits: TH 6m FH 8.6m
Further requirements:

Builders’ requirements
Style, roof shape, building type: Full ceiling height in the upper floor, therefore flat or hipped roof, shed roof would also be conceivable. Lots of light in the house as there is an unobstructed view toward the garden.
Basement, floors: Basement, 2 full floors
Number of people, age: 2 persons m/f, 28/29 years old
Room requirements on ground floor, upper floor: Work/guest room, open living, dining, kitchen area, toilet with shower on the ground floor, 2 children’s rooms, bedroom with dressing room, large bathroom in the basement, hobby/fitness room and a study for home office, if 2 children are present, technical/utility room, storage room
Office: Family use or home office? My fiancée is a teacher, I work from home 2 days a week.
Number of guests per year: maybe 5 times
Open or closed architecture: Tendentially rather open, so that the existing space appears as large as possible.
Conservative or modern construction: modern
Open kitchen, cooking island: Yes to both
Number of dining seats: 6 permanently, 8 only situationally
Fireplace: Planned, but still uncertain due to position, therefore not in the design
Music/stereo wall: Not planned
Balcony, roof terrace: It is planned to provide the basement with a ground-level exit and have a small terrace there. A balcony will then be built in front of the living room on the ground floor by own efforts, as the main outdoor living place.
Garage, carport: Double garage
Utility garden, greenhouse: Nothing planned yet.
Further wishes/special features/daily routine, also reasons why this or that should or should not be:
We have a beautiful, unobstructed view to the southeast which will most likely remain unobstructed (there is a stream). Therefore, we want to see as much of it as possible => window area, terrace/balcony etc. We are grateful for suggestions also regarding heat protection, whether this could cause problems?

House design
By whom is the planning made:
- Architect who works with our construction company
What do you particularly like? Why?
The ground floor suits us quite well already. Kitchen with pantry hidden behind wall.
What do you not like? Why?
Bedroom upstairs feels too large, dressing room too small, possible children’s bathroom upstairs? Unsure whether the layout upstairs bathroom is good. TV corner a bit small? Strange unused space behind the couch in the corner. Too little storage space due to many windows? Does a fireplace make sense here? Would a kitchen with island also be possible here in U-shape or would that be too narrow? U-shape would have more storage.
Cost estimate according to architect/planner: 440k€
Personal price limit for the house, incl. equipment: 500k€
Preferred heating technology: Ground-source heat pump

If you have to do without, which details/extensions
- you can do without: Fireplace, space in the bedroom
- you cannot do without: lots of storage space in the kitchen, lots of light in the living room and windows facing the garden, work/guest room with min. 14m²

Why did the design turn out the way it is now? e.g.
Standard design from planner: Modified standard design. External dimensions were enlarged, floor plan almost completely changed.
Corresponding/which wishes were implemented by the architect: Pantry solution hidden behind kitchen unit, passage from bedroom to bathroom. South-facing corner living area, garden-facing bedroom
What makes it particularly good or bad in your opinion: The conditions of the plot are used quite well. What spoils it somewhat are the still open questions.

We are actually quite satisfied with the design but have no experience with building issues and so it is quite possible that we do not consider many things. Often a floor plan does not immediately reveal the spatial feeling that will result later, for example. Furthermore, it is of course possible that we overlook many things that more experienced people would notice immediately.

That is what I hope. Thank you very much in advance for all critiques and suggestions!

I can't believe the budget or the price estimate, for three floors?!

I am reminded of my thread. Here, 9.35m exterior dimension seems to be easily enough for the open space, while for me 9.90 interior dimension appears too tight ;-)

I have a few ideas for the upper floor. How flexible are you? Would you also be able/willing to adjust the windows on the upper floor?

Standard design from the planner: modified standard design.

Which (Bien-Zenker ?) model is behind it?

I can't believe the budget or the price estimate, for three floors?!

It reminds me of my thread. Here, 9.35m external dimension seems to be easily enough for the open living area, while 9.90 internal dimension seems too tight for me ;-)

I have a few ideas for the upper floor. How flexible are you? Would you also be able/willing to adjust the windows on the upper floor?

Budget: There are limitations. The template only asks very openly for "house". The plot is not included and the basement is not fully finished as living space. We actually only use the planned hobby room downstairs + later the office, and the home construction company wanted absurd money for fully finishing the basement (50k). Is that normal, actually? The screed will be done in the basement and a proper floor should go into the two non-usable rooms.

Well, so far no one except me has said that this is enough :) Ideas for the upper floor: bring them on. We haven't really thought too much about the windows there yet. Only the corner windows in the bedroom we would like to have and the one in the dressing room can go.

Which (Bien-Zenker ?) model is behind this?

It's Schwabenhaus and originally was once a Solitaire 145.

Be sure to draw in furniture to scale. The open-plan room promises spaciousness that will not exist with real furniture.

Roughly sketched. Don’t stick slavishly to the idea that both children's rooms have to be exactly the same size. For me, that protrusion in the hallway towards the bedroom isn’t worth it. Place the doors to the children's rooms in the middle of the hallway and, if necessary, use a wall offset to achieve equal size; for example, a cabinet could stand there.
Bedroom still large enough.
The dressing room would really deserve the name dressing room here.
Parents’ bathroom and children’s bathroom separated. Yes, you now enter the parents’ private rooms through the bedroom, but bathroom and dressing room are next to each other and separated from the bedroom. That way, you’d have to quietly pass by the still sleeping person once in the morning when getting ready. The children’s bathroom only works with a bathtub or shower in my sketch. Crazy idea: possibly use a corner bathtub if the little ones are still small. Replace it with a large shower after a few years.
Think about it and play around with the floor plan yourself a bit!