ᐅ Interpreting the zoning plan / Is it even feasible to implement?

Keep writing anyway.
The surrounding buildings can be seen from the outside: ground floor and attic floor, without knee walls. Whether there are basements is unknown. There is one house with a dormer window. Otherwise, there is a house with a ground floor at basement level and an upper floor, then a roof without knee walls.
The plot is slightly sloped. The gradient is currently unknown. However, in my opinion, it is not steep.

Eden1812 schrieb:

However, in my opinion, it is not steep.

Can you get a plan with an elevation profile? If not, get a water level hose and measure it yourself, or talk to the neighbors to see what they know.
Eyeballing it is just unreliable when it comes to height differences. My plot has a 2-meter (6.6 feet) difference diagonally. When you're standing on it, it doesn't look like that at all, more like 70cm (28 inches).

11ant schrieb:

It should also be clear from where the measurements are taken.

Yes, from the planned terrain. That’s quite reasonable.

Eden1812 schrieb:

Otherwise, a house with a ground floor in the basement level and an upper floor, then a roof without knee walls.
The plot is slightly sloped. Gradient currently unknown. However, in my opinion, it is not steep.

The red and blue don’t quite match. But it is quite common to build like this with two full storeys on a slope (basement + ground floor + roof). It would also comply with the building regulations / planning permission.

At least now you have a usable statement.

That was really a difficult process.

WilderSueden schrieb:

Can you get a plan with an elevation profile? If not, get a water level hose and measure it yourself, or ask the neighbors what they know.
Estimating by eye is just unreliable when it comes to height differences. My plot has a 2 m (6.6 ft) difference diagonally. When you stand on it, it absolutely doesn’t look like that, more like 70 cm (28 inches).

You can easily find that on the BayernAtlas with an accuracy of 0.1 m (4 inches).

@Eden1812 Is there no geoportal available in your area?

If the development plan indicates a U shape and a layperson mentions that there is a slope, but not a steep one, you can assume that there is enough of a slope to make building a simple bungalow on a slab foundation difficult. It is better to plan with a basement in this case.
-> This will not be a cheap build, nor comparable to building on flat land.
I hope this partly answers your question?!