Thank you for your opinions.
The plan is to push the house almost all the way to the back, leaving about 5-6m at the back (north side). In summer, it might also be useful to have a small shady and visually protected garden. Additionally, the distance results from the 3m minimum distance and 2-3m the garage protrudes beyond the house at the back. This way, we would still have 16m of south garden in the front. We only want to pave the driveway about 3.5m wide and only go to full width next to the house or in front of the garage.
The house including the garage as a boundary building is pushed as far as possible to the "back right". Because of the garage and the entrance area, nothing more is possible. I would have wished for a bit more distance on the "left", i.e. on the west side, because of possible shading, since you don’t know how the neighbor will build. But with 21.5m plot width and east entrance with double garage, it’s tight. But I do not want to give up the double garage.
By the way, the garage would already be quite large, even 9x6m contrary to the plan, which should accommodate about 20sqm of cellar replacement room in addition to 2 parking spaces. Then a bit of attic as well. The rooms for technology and laundry room would then be in the building. I think that should be enough for us. We don’t fundamentally dislike having a cellar, also because we have a slight slope. But we wouldn’t need a full cellar, a partial cellar would have been sufficient. Everyone advises against that though, because it’s not much cheaper and possibly problematic due to settling etc. With the currently offered cellar price, it’s off the table for us.
Our idea is to have as few stairs as possible and to have everything comfortably accessible. Therefore, the laundry room is planned on the upper floor (that still has to be added to the plan), where the laundry is generated, and possibly even a roof terrace above the prefabricated garage, also to be able to hang out the laundry there if needed. We would probably forgo the large balcony marked on the south side, also for cost reasons, and only do a canopy, pergola, or similar.
The floor plan proposal is based on an initial smaller solution and therefore still has flaws here and there. We generally already like the ground floor. The garage access there is also because due to the slope the garage would be somewhat higher and steps are necessary. Hopefully, that will be resolved because only about 50cm need to be compensated and the garage will be recessed accordingly. That should also better fit our “single-level thinking”.
On the upper floor, I still see potential for optimization. Not only does Children’s Room 1 have many windows, the children’s rooms at 20sqm are also somewhat large, while the bedroom is rather small. The goal would be to have children’s rooms of about 15sqm each and the bedroom with 20sqm including dressing room. That would leave a few square meters for the laundry room etc.