Floor plan of semi-detached house, 2.5 floors + usable basement

Hello everyone,

we are planning to build a semi-detached house with 2.5 floors + basement. We have received a first draft from the general contractor and would like to discuss it with you.

The floors are divided as follows:
Basement = utility cellar
Ground floor = living/dining + kitchen + WC + GARD
Upper floor = 2 large children's rooms + family bathroom
Attic floor = bedroom + office + WC/bathroom

Development plan/restrictions
Plot size: 420 sqm
Slope: no
Floor area ratio: 0.4
Floor space index: not specified
Number of parking spaces: carport + 1 parking space
Number of storeys: 2.5
Roof shape: gable roof, 35 degrees
Style: semi-detached house
Orientation: SE
Maximum heights/limits: WH = 6.5m GH = 10m, max. width = 9m. Due to the GH restriction and the roof pitch of 35 degrees, the max. depth = 10m.

Client requirements
Style, roof shape, building type
Utility cellar, 2.5 storeys
Number of persons: 2 adults + 2 children (5 and 7 years)
Overnight guests per year: negligible
Large kitchen, open but still closable with sliding doors, cooking island for prep work (cooktop is initially not planned on the island)
Number of dining seats: 6
Fireplace: ethanol fireplace integrated into the living wall
Carport
Separate floor for the children as well as large children's rooms
Sauna in the attic
Dormer on the north side
Ceiling height on ground and upper floor each 2.50m
Office/guest room in the attic

House design
Who designed it: general contractor (traced by me in Sweet Home 3D + added furniture)
What do you particularly like? Why?: large living room with large windows, large kitchen, large children's rooms
Preferred heating technology: air heat pump

What is the most important/basic question about the floor plan summarized in 130 characters?
- Living room: are the windows chosen too large?
- Children's rooms: how do you find the layout, especially of child 2
- Family bathroom: is the passage to the toilet and shower too narrow?
- Office: 2m are reached quite quickly after the entrance, dormer is present but I am not sure how the room will feel. What do you think?

The question of the budget presents itself to me.

The question about the budget arises for me.

The price is within the planned range; this is meant to be only about the floor plan.

Is the other half already in place? If yes, what does it look like?

Is the other half already built? If yes, what does it look like?

No, it is not built yet. The dimensions of the house will be identical, the width may differ. The floor plan is not yet known.

I hope you are building not just half, but the entire duplex with the same general contractor. Sometimes I get the feeling that the Goalkeeper thread should not be pinned here in the forum, but rather pinned on the internet in general (or better yet, written in all schoolbooks)...

this is supposed to be only about the floor plan.

In that case, I would have preferred to see the original professional floor plan shown instead of it being redrawn by an amateur. With such "whisper down the lane" methods, relevant details regularly get lost.