Hello BeHaElJa,
thank you for your ideas for the hallway and the basement.
Making the storage room bigger at the expense of the shower room is possible. However, we would like to have a changing table and a cabinet for towels, among other things, in the shower room. The changing table does not need to be as wide as drawn, the cabinet should actually be behind the door and the door further to the left. But we will take another look to see if it can be arranged differently. I also like the idea of using the storage room as a wardrobe and removing the wall, but we still need to discuss that internally.
There is supposed to be a room above the garage, so the passage between the house and the garage will presumably be made of concrete, at least not of glass. Then the question is how much a side panel at the front door would help, whether enough light would come in there at all.
Should the window be in the stairwell? There is already one planned there...
The stairwell goes from the basement to the upper floor, so there is no space under the stairs for a storage room.
