ᐅ 200 m² single-family house for 4-5 people without a basement on a narrow lot

Hello,

I’m looking forward to your opinions on this design.
Thanks in advance for your suggestions!

Development Plan / Restrictions
Plot size 525 m² (5650 sq ft), 17 m (56 ft) narrow along the street at the south end x 31 m (102 ft) long north-south orientation
Land is completely flat
Site coverage ratio 0.4
Floor area ratio 0.8
Building envelope, building line and boundary each 5 m (16 ft) from the street at the south and from the northern border
Edge development
Number of parking spaces 2
Maximum height / limits 8 m (26 ft) total height (attic will be quite low)

Client Requirements
Basement, floors 2 full floors without basement
Number of people, age 2 adults + 2 children (currently small) + possibly a third child
Room requirements on ground and upper floor 2 children’s rooms, 1 office/guest room large enough to be another children’s room, 1 additional small office, guest bathroom with shower, open living-dining area
Office: family use or home office? Only for work after hours and weekends, as well as for taxes etc.
Number of overnight guests per year few
Open or closed architecture
Balcony, roof terrace no
Garage, carport Double garage would be good, but probably won’t fit?
Utility garden, greenhouse no
Other wishes / special features / daily routine, also reasons why some things should or shouldn’t be included
Bedroom facing north for a clear view; no north-facing garden because it would be too dark in autumn/winter due to shading from surrounding houses; overall, lots of natural light in the living areas is very important to us
Enough usable space and storage inside the house (large utility and service room), since we don’t have a basement and there is no room on the plot for large garden sheds

House Design
Who designed it: self-designed based on a template
What do you like most? Why? Layout of the upper floor (nice children’s rooms with south and southwest orientation, bedroom facing north, large utility room), possibility of a second terrace on the north side by the guest room for shade and view north in midsummer
What do you not like? Why? Entrance area on the ground floor is a bit narrow, otherwise we’re quite inexperienced with what might work well or not in everyday life.

If you had to compromise, on which details or expansions
-You could do without: large hallway areas, if necessary a half-landing staircase (instead of more space-consuming stairs), if needed a pantry next to the kitchen (could be replaced by space under the stairs), a structural requirement might mean adding an extra partition wall in the utility room (which could also be used as a room divider for more storage space)
-You cannot do without: south-facing living-dining area, enough space for bicycles etc. on the property (currently a bit tight)

Questions about the floor plan:
- Is the plot well used?
- Is the entrance area too narrow at 175 cm (69 inches)?
- Are the rooms arranged practically for a family of 4 to 5?
- Do we have enough storage given that we lack a basement and the attic is quite low?
- Is it a big disadvantage in terms of sound transmission that the two children’s rooms share a common wall?

Note: The entire plan will be revised by a professional once we are happy with the overall layout. Then dimensions will be more precise, drawings nicer, and structural calculations reliable. I’m just interested in early feedback on potential weak points and good alternatives.