Construction of the passenger car parking space

Gap in the building line...

This is probably where the problem lies; with gaps in the building line, the neighbors always seem to feel like they have control over everything, just because they have lived next to the green meadow for 20 years.

What I quickly found: According to the Thuringian Building Code §60 exempt from approval are... 9. Embankments and excavations with a height or depth of up to 2 m and a base area of up to 30 m2, in the outer area up to 300 m2; With that you would fall out at 3-4m x 15m

I have meanwhile also asked Google and found exactly in the paragraph quoted by that walls including retaining walls up to 2m in height are exempt from approval. Presumably a bit of Shakespeare: much ado about nothing...

That sounds to me like a typical case of someone who believes the previous owner once gave them an oral right of first refusal, and who would have preferred that their children had built there so they could have annoyed their in-laws.

He was constantly walking around the construction site, entering the house without ever announcing himself.

On my construction site, any unauthorized intruder would be authorized to be taken down.

: Don't just read what you like! It says

Height or depth up to 2 m and a base area up to 30 m2

Means that you are allowed to pile up to 2m, but not more than 30 sqm base area. With 3-4 width and 15m length, you are comfortably exceeding that.

Uff, so I am allowed to build a wall or retaining wall (up to 2m high - that was the part I found myself), but then not pile up behind it? Or at most on 30m²?

From when does it count as piled up? We start with zero fill (the first 3m is not a retaining wall either) and then the filled height rises over a length of 10m from zero to maybe 50cm. Have I piled up if I add 10cm? Or 20? That’s ridiculous, the excavator passes over there so often, nobody knows anymore what the original level was.

The strip is exactly 13m long, piled up maybe on 10m of it, and the width is 3m at one end and 3.5m at the other. You might have to measure very precisely to stay under 30m²...