The property boundary has become distorted on the attachment; therefore, it looks as if the garage is n meters on the neighbor's property. I have inserted a new one.
We want to move the sill-height window towards the kitchen so that a window comes after the carport. (We also want to extend the kitchen along the window in that area.)
Including the space under the stairs in the utility room is also a good idea. However, we want to leave the utility room as it is for now.
The door under the stairs was checked by the architect and it fits.
Initially, there will be a wardrobe under the stairs.
The utility room should also serve as a storage room, which is why it's somewhat larger than required in case space becomes tight.
As mentioned, I have control over drywall work and would then convert the space under the stairs into additional storage if the utility room is not sufficient.
P.S.: We have been living in a 35 sqm attic apartment for 12 years, and for almost a year now, the three of us. With this, I want to indicate that I can distribute things throughout the entire living space—not everything, but a lot. I do not have to store everything in one room.
Best regards