In the building located on the property there are apartments, so I assume that this is the case.
From the aerial view, it looks like you have to drive over the Sparkasse parking lot. Therefore, I assume it is a private access road. So, building burdens and easements would still need to be taken into account. Also, the maintenance costs would have to be clarified.
so the standard land value is also to be assumed if the ar
The standard land value is a value you can refer to if you have no idea about the local prices or don’t want to bother analyzing the current market. It reflects the prices that were paid in the past during sales. Ultimately, only supply and demand determine the price.
Would this be only the connections or the "complete" new development?
That was, just like the land price and the surveying costs, only a very rough estimate. The price depends on so many factors, e.g., the current order situation of the companies in question, so more accurate information is impossible. At the end of your construction cost overview, there should be a buffer of at least 10%, so that deviations of up to 50% in individual items can be absorbed.