Something like that just won’t let me rest.
, are you sure that your floor plan corresponds to the external dimensions 10.30x8.48m? I have now made an attempt. First, the area information from my result:
Where the living area was determined according to the rules for areas under 200 cm height.
What I already pointed out is the problem of windows on the upper floor with a knee wall height of 160 cm. Here is the southeast view with a floor-to-ceiling window in children's room 2 ... I had once specified the window height as 145 cm. You can see, that is already too much, because the roof beams are easily visible there. So, more than 135 cm height will not be visible there. On the other hand, roof windows will only bring light into the rooms from an interior height of at least 160 cm.
On the other side in the imagined stairwell also a window, from the upper floor perspective with 0 cm sill height and 80 cm window height, view then like this:
Then I tried to implement your specifications. However, I enlarged the utility room and also used it as storage space, including washing machine and dryer. Something like a pantry with space for a vacuum cleaner then under the stairs within kitchen access.
Sofa in the middle of the room with space to walk through, space for a kitchen island and sufficient distance to the TV in my opinion does not work with 775 cm room width. Therefore, a somewhat different approach, making the living area a bit more private as a result. The dining table is marked here, for example, as 90x180 cm. The kitchen island is approximately 120x120 cm.
On the upper floor I had the same idea as . Dressing room in the middle, sleeping on the right towards the north, so that the southern sun does not heat up the room so much. Room depth here 305 cm .. bed with frame outer dimension of about 175 cm .. you see, that still won’t be big.
Children’s bathroom now only with a small corner shower.
For child 2 only roof window and this knee wall window come into question. Unfortunately, I don’t like that very much yet. A clever idea is missing here on how to implement this better at the top.
As I said .. I have the impression that something is wrong with your dimensions.