1. On the upper floor you have a relatively large hallway. Are there any reasons (other than the lighting) to leave it as it is?If you don't want to enlarge the children's room and the bedroom, maybe a storage room would still be useful.
The hallway is intentionally designed to be continuous and to have a skylight on both sides, also because of the very beautiful view to the south (entrance side). We don't like these small closed hallways that much and the relatively large width of the house works in our favor here.
2. Would the installation shaft from the bathroom come down into the kitchen??Yes, exactly, it would be conceivable here that the cooker hood vents through the roof or other pipes are routed. This is an additional optional solution; otherwise, all the rooms that require installations are already stacked on top of each other.
3. For further assessment, the furnishing is missing.That's true, I could improve on that.
4. What is the side entrance for?As can be seen in the graphic, this is a pronounced hillside property (south-facing slope). Since we use the entrance in the basement as the main entrance, except for the terrace door, we would have no other way to enter the house. Additionally, this side entrance leads directly to the guest toilet, which can be quite useful in the garden area, without having to walk through the whole house or take the detour via the outdoor stairs.
In general, the design with its relatively narrow and long floor plan takes into account that you don’t have to go so deep into the slope, which would also be problematic in terms of height.