Floor plan revision, tips and experiences for improvement?

In addition, there would even be access to the house.

Thank you very much for your effort. May I ask how it would make sense to create a forecourt so that parking spaces can be reached on ground level? Then the path to the house would be with stairs or is the house located far enough down?

If you leave the driveway where it is in your shown planning stage, then you have a "forecourt until the doctor comes" (and possibly overstrain the basic paved area ratio). I didn’t even want to touch the question "how many cars park in front of the garage door"—but only wanted to show you where the garage could be accessed without overcoming much height difference. I placed the house only for easier comparison on the same "left front" corner as before. In this sense, the front door threshold is also "original unchanged." I would probably shift the driveway about its entire width to the left as per the plan, and pave only up to the garage. I would let the path to the house follow the terrain as a bound gravel surface and sprinkle stepping stones into it. My sketch is only meant to serve your imagination and neither represents my proposal nor is it a "yes, do it this way" stamp at this "starting point" in the form of the mentioned house corner. I used the ground floor plan only as a dummy and scaled it proportionally, as I said one meter wider but with the same area. You could make the house overall approximately three meters wider (or shift it accordingly in the building plot). Concretely, I’m not suggesting any alternative here; that would go honorarily far beyond. As an impulse, you should suffice with: 1a. separate the garage from the house; 1b. beam the garage downhill >> purpose: driveway without steps; 2. adjust the format/proportions of the house aiming for a narrower gable >> purpose: primarily less height difference between front and back of the house; optionally 3. shift the house within the building plot >> that also opens up more "garden next to the house," whether to the west or east, you choose. To my recollection, the house at doesn’t “begin” only “behind” the garage. If you want more planning input from me: new mandates currently being discussed can only be processed in the new year, i.e., in four months. But judging by the standard taken into account by your planner, you don’t badly need my consultation, so this brief nudge here should suffice.

your memory. No, our house is next to the garage. It just turned out that way.

@11ant your memory. No, our house is next to the garage. That’s how it happened.

Exactly, that’s what I said: it doesn’t start only behind it. I remember seeing it from the street to the left of the garage. Whether and how far it is offset in the front alignment, I have forgotten in detail. In any case, the house is not set so far back that its front only followed (in the local OP’s case even with some distance) the end of the garage. In my sketch, the garage is positioned so close to the street that the front edge of the house follows “offside” and thus noticeably higher.

Does one of the pictures correspond to your idea and would it fit better with our project? Would it perhaps be wiser to integrate the garage downstairs a bit, with technology, storage room, utility room, and then add two floors above? It should not exceed 200 sqm. Or leave certain rooms unfinished?

Image 3 can work well. Adjustments to reduce costs are, in my opinion, necessary. I will take a closer look at it.

But then you have 2 floors up to the living area. As already indicated, my suggestion is rather living downstairs.