As a first preliminary draft, the blue variant is proposed, which is actually analogous to the variant suggested by hanghaus2023, only losing more space towards the south. The reason for this is that the garage is 7m wide and there is a staircase leading to the garden and to the cellar/laundry entrance between the garage and the house.
As already said, cellar ???? Do you have the 100k?
Nobody needs an exit from the cellar. Better rather an exit from the storage room to the garden.
I have this in mind without a cellar and instead 3 * 6 m storage space in the garage.
To get more south garden, I had already shown a draft once, which was then trashed by .
Then it would only be about 7.5m from the south side of the house to the boundary. With a nice large terrace, there is not much left to the boundary and if someday the next place in the south is built on, you will have it right in front of your nose.
Therefore, I would rather place the terrace in the east. There you have the non-buildable side and not so much heat in summer.
And while we are on the subject, since you get along well with the existing neighbors in the north, it is still unclear whether we want to place the garage directly on his boundary, as it potentially shades his terrace.
For these reasons, the green arrangement was proposed as an alternative
That is nonsense. Your house is much higher than the garage. The neighbor will have shade anyway. The 9 m long garage on the boundary is already fine. The neighbor can be glad that you are not building the house 3 m from the boundary.