Bungalow or single-family house with approximately 110 m²

A site plan with elevation points would still be useful. It is actually conceivable to have two stories, with a garage, utility room, possibly sleeping/bathroom downstairs, and the public rooms upstairs.

I don't think the slope is too steep for that. I can't find a site plan with elevation points right now. :-( With the geoatlas, I was only able to measure the slope.

If the property doesn’t belong to you yet, of course there is no site and elevation plan; to my knowledge, the data from the geoportals is too inaccurate for elevation information.

If you have a reasonably modern smartphone with a barometric sensor, then download an app: I use "Höhenmesser Plus," this app uses the smartphone’s barometric sensor for elevation measurement. Calibration is done using a known reference point or based on geodata that the app retrieves from the internet. An approximation is sufficient, since what matters is the relative difference between the highest and lowest points, not the absolute height above sea level.

With the app, go to the property and place the phone successively on various points, e.g. the boundary points, and enter the measured elevations into a plan. With my Galaxy S8, I was able to verify the surveyor’s site plan within a 10cm elevation deviation, so for starters this works accurately enough.

A site plan with elevation points would still be useful. It is actually conceivable to have two stories, with the garage, utility room, possibly bedroom/bathroom downstairs, and the public rooms upstairs.

Not really.
The slope runs from north to south. It is high in the south. Planning a two-story building there so that two levels appear in the north is not something I find desirable or even necessary. Especially because single-level living is desired and the garage can actually reduce the level by half or a quarter quite well. With 110 sqm, you don’t really have to use the available space on the property sparingly. With 160 sqm for 4 people, it would be different.
For the effort of the earthworks, it probably makes no difference.

Yes, the windows then faced north, which probably doesn't make sense. An alternative would be a regular single-family house instead of the bungalows.

Yes, the windows then faced north, which probably doesn't make sense.
An alternative would be a normal single-family house instead of the bungalows.

I’ve already mentioned two alternatives/solutions...
However, I don’t understand the alternative Town & Country nor the normal single-family house compared to a bungalow...

The floor plan alternatives differ quite significantly from each other.

The garage would be set somewhat deeper due to the lowering.

With the mentioned slope, I do not see this "somewhat" as large enough to get reasonably nice windows there – at best only ones that provide light but no view, if not even ones whose window sills are barely above heavy rain well above the garage roof.