I will take pictures of the property and the adjacent garage in the next few days.
The main problem is that I am getting the property relatively cheaply now from the future neighbor on the left side. His garage is about 0.6 meters above my property. There is a gravel-covered gap to his garage on my property, I think it is a drainage pipe in the ground on my property. I want to get a second property from the new neighbor, so I will not start a legal dispute over the 50 cm now, even though they will unfortunately be missing inside my house.
Würfel’s idea is definitely good. Painting the hallway and combining the storage room with a wardrobe is quite cool. The storage room should only store vacuum cleaner, mop, and crates of water and beer.
I don’t really like the idea of reducing the living room in favor of a bigger kitchen. We are 5 people and I want to have enough space in the living room. Currently, I have a rough construction dimension of the dining/kitchen area of 9.8 m by 3.8 m, which is already quite large. The living room is now 4.4 m by 5 m and I think that is pretty good but not large either.
I will also go to kitchen planners to really get an idea of the 3.8 m kitchen width and the door position.
But this staircase on the side is just not good. Because of it, I have these 2 doors and the entrance right in the middle of the kitchen.
Maybe one should consider whether a window facing the street is absolutely necessary from the kitchen. Otherwise, the guest bathroom could be placed there and then the staircase on the left would make more sense.