I prefer the solid line version, even if only "taste-wise."The dashed lines in the attic floor plan show an alternative wall layout between the children's rooms.
Do you mean if there is another door to the hallway in the basement as a windbreak?
No, when you enter from the main entrance on the ground floor, after about 1.5 meters there is another door that clearly serves as a gateway to your domain. In front of it is the neutral zone, inside is mine. And in the basement corridor after the door: yours.
If applicable, I would also consider installing a separate door from the cellar room to the technical room, because then the corridor in the basement would no longer be needed by you and could possibly be useful to the tenant (as a storage room with built-in cabinets).
Is the entrance meant seriously? I had thought of it more as a patio door, a side entrance, or for smokers.
How is it supposed to work, key in the lock, open the door and then take a step forward and onto the sofa? What about the wet clothes, the dirty shoes - everything drips onto and soils the parquet or carpet flooring? I take off my jacket in the kitchen.
And then: The jacket ends up on the kitchen counter and the shoes stink away in the kitchen?
Admit it, something like that is not practical. Somehow it might work for students and such, but: it could be different! There is already a mini hallway with a wardrobe (the AR), so it should be used as such and then the granny flat should be accessed from there.