just saw the aerial images from the cadastre,
Not us! …
everything behind it belongs to him too
One is also allowed to own a bigger slice of the pie.
Hammergrundstück does not mean an especially great property ;) It means a rear property
It is not a Hammergrundstück. He is selling the rear property, which is marked in red. To the northeast there is a utility path "to further properties," (it does not matter who owns those for now)
What, the seller owns a very large property
That doesn’t matter at all for now. The owner, who most likely also lives at the front, has a path to the northeast to access his additional hectares of land. Presumably, those aren’t even developable after the 35er, since the red area must be built on first, "quasi after-densified." The buyer is allowed to share the use of the path. You don’t have to like it, then just don’t buy. But it seems to be a purely private path of the owner. But there are simply worse things! For example, if you also had to buy and pay for the magnificent street. However, if someone smells trouble here without argumentation, I cannot understand that.