Optimize new single-family house floor plan

Hello everyone,

I would like to get feedback on the following floor plan. I am completely new to the forum but have read feedback on various other designs here.
Before "completely redesign" comes as feedback, I prefer to present a not yet fully finished design for discussion.
Not yet complete are: windows (position, size, ...), furniture arrangement in the living room, separation of the utility room and the adjacent pantry, acoustic optimization of the office.

Development plan/restrictions: driveway on the left, must not be on the same side as the house
Plot size: 650 sqm
Slope: no
Floor area ratio: 0.35
Floor space index: unknown
Building window, building line and limit: 3m
Edge development:
Number of parking spaces: 1
Number of floors: 2-3
Roof type: no hip roof allowed
Style: doesn’t matter
Orientation: predetermined due to the street
Maximum heights/limits: 11m for 3 floors
Further requirements: open construction method

Client requirements
Style, roof type, building type: Bauhaus, flat roof
Basement, floors: no basement, 2 floors
Number of people, age: 5 people, including 3 children aged 2-8
Space requirements on ground floor, upper floor: unknown, will rather be derived from the required rooms
Office: separate room for the office needed
Guests per year: at least 2, several weeks at a time per year
Open or closed architecture: closed due to acoustics
Conservative or modern construction: modern, minimalist, efficient
Open kitchen, cooking island: cooking island desired, open kitchen desired
Number of seats in dining area: normally 5, more when guests come
Fireplace: no
Music/stereo wall: no, but good idea
Balcony, roof terrace: no
Garage, carport: carport directly next to the house
Utility garden, greenhouse: small garden, accessible from the terrace, which should be accessible from the living room
Further wishes/special features/daily routine, also reasons why this or that should or should not be:
- Ground floor as age-appropriate as possible (older guests, therefore guest room and shower on the ground floor)
- In the morning, the sun should shine into the bedroom to wake up naturally.
- Terrace not southwest-facing, as it gets too hot
- The office should be located so that very early rising or night work disturbs as few other people as possible.
- The office should be acoustically well shielded from the rest due to phone calls (children should rather not be heard, the "worker" should rather not be heard outside the room).
- Children's rooms can be relatively small since bunk beds with space underneath are planned.
- In front of a TV in the living room there must be enough space for children to participate (dancing, etc.).
- Value is placed on quietness (low volume) because the current living situation is too loud and stressful (loud street, drafty doors, children making noise everywhere).
- As efficient and functional as possible: short distances, easy to clean, cleaning robot should be able to reach everywhere
- The need for smart home and the space requirement for corresponding devices is still unclear.
- It should be filled with light, but in the evening should also be quickly darkened (blinds down or similar).
- An electric piano must fit somewhere (probably on the upper floor, gallery above the front door).

House design
Who designed it: based on a standard design with many DIY modifications

What is liked particularly: It seems to be already efficient.
What is disliked: Possibly too little storage space (no basement, so a shed will probably have to be somewhere)
Price estimate according to architect/planner: not known yet
Personal price limit for the house, including equipment: approx. 450,000,-
Preferred heating technology: district heating, as it is standard there

If you have to do without, which details/extensions
- can you do without:
- cooking island
- kitchen does not have to be open
- if absolutely necessary, one of the children's rooms, but another would have to be larger
- cannot do without:
- separation of guest and office room, it really must be 2 rooms

Why did the design become what it is now?
We looked at many standard designs and then took one as a basis for various modifications in many iterations.
What makes it particularly good or bad in your opinion? /

What is the most important/basic question about the floor plan summarized in 130 characters?
What can still be designed better and why? Unfiltered feedback is welcome.

Thank you

Hello, What struck me spontaneously: I find the kitchen layout strange. Is it supposed to be two rows and a small cooking island in the middle? With 80cm depth, you’re more likely to splash the floor all around while frying. I would swap the sofa/TV with the furniture on the left side of the plan. That way, there is more distance to the dining table and you avoid that strange empty space by the wall. I think there isn’t enough wardrobe space for 5 people plus guests. Otherwise, it’s hard to assess whether the furniture and staircase are drawn realistically because there are no measurements. Did you include your current furniture?

For a first draft, I find it very successful.

Are there reasons for the significantly larger Kind1?
You apparently transferred the walls from the ground floor to the upper floor. In itself a good idea, but I would gladly pay for the few reinforcement bars if, in exchange, Kind 3 becomes bigger, Kind 2 has one corner less in the room (corners also cost money) and Kind 2 then enlarges at the expense of Kind 1...

I find the kitchen planning strange. Is it supposed to be two rows and a small cooking island in the middle? With 80 cm depth, you’re more likely to splash the floor all around while frying.

Cooking island in the middle, rest around it (not detailed yet).
Do you mean 80 cm is too little for a cooking island?

I would swap the sofa/TV with the furniture on the left side of the plan. That way you have more distance to the dining table and avoid that weird empty space by the wall.

OK, maybe there will be a corner sofa after all.

I think there is not enough wardrobe space for 5 people plus guests.

OK, I have to check.

Otherwise, it’s hard to assess whether the furniture and stairs are realistically drawn in because there are no measurements. Did you draw in your current furniture?

I haven’t detailed the stair measurements yet.
Dining table + chairs (which we would like to keep) + sofa + 2 cabinets (can be replaced) are the current furniture.

For a first draft, I think it's very successful.

Thank you

Are there reasons for the significantly larger Child1?

No, it just happened. Such a "tube entrance" only contributes to a larger room on paper; in practice, you can hardly put anything there. We would have preferred all 3 rooms to be similar.

You apparently transferred the walls from the ground floor to the upper floor.

Exactly.

Basically a good idea, but I would gladly pay for the few reinforcing bars if that makes Child 3 bigger, Child 2 has one corner less in the room (corners also cost money), and then enlarge Child 2 at the expense of Child 1...

You mean pushing the upper walls in the picture at Child 3 and 2 a bit upwards?

Hallway of 11.? sqm with just under 4 meters in width? The room is approximately 4 x 5.5 + 2 meters landing. That makes 24 sqm... maybe a bit too much space, which cannot even be properly furnished due to the central staircase location. The dining area feels somewhat squeezed in. And the children's rooms: not exactly great thanks to the lousy staircase location.