Type of surface water infiltration

Yes, that can be required. We had to build a soakaway. As also suggests, we placed a cistern in front of it.

Yes, but then it must be stated in the development plan

Just so there are no misconceptions, a soakaway trench for a single-family house costs a three-digit to low four-digit amount.
So it gets lost in the background noise later on

Correct design and you never waste another thought on it

Just so there are no misconceptions, a soakaway trench for a single-family house can be obtained for a three-digit to low four-digit amount.

If the area to be compensated is small, the soil class is favorable, the terrain is flat, and the positioning is simple, that's true. Better check. For us, it was five digits.

I will rephrase the question:

1) Can the type of infiltration be prescribed

2) If yes, does this have to be done in the development plan?

1.: Yes. 2.: No. In fact, the lower water authority can also impose conditions in order to grant its approval. Therefore, I would contact the lower water authority once to ensure a smooth process.