Demolition of buildings: Impact on new construction?

Our topic is the following: we have purchased a plot of land to build a single-family house. There are old buildings on the property that we want to demolish. There is no development plan for the area. However, a call to the responsible authority revealed that the development should be oriented to the neighborhood. Specifically, this means that the house should be set back 4 m from the street. This is too close for us because we want a nice front garden with a garage in front. The house should also be set back a bit further due to the noise from the street. One building, the largest, is set back 17 m from the street.

Questions:
Can we somehow use the location of the largest building (the one 17 m away) as an argument to build our future house further than 4 m from the street?
If that would be possible, does it make a difference whether we demolish the building now or later? We don’t want it to be said later: if you had left the building standing until such and such date, you could have built your single-family house there too.... or is some kind of documentation required? If yes, how? Are Google Maps images sufficient?

I hope I was able to express myself somewhat clearly. Otherwise, please feel free to ask. Thanks in advance for answers. Best regards

Is the large building the residential house?
What does it look like at the neighbors'?
Possibly house at the back and garage at the front

Here some build on the old cellars so that the houses were allowed to be positioned again like the old ones.

We should also move back to the street again. Really up to the sidewalk. Made an appointment with the business manager and got green light to follow the old building line of the stall on the slope.
- old house too small
- street too busy
- no south orientation possible - after all, we want a passive house
- they would have approved everything anyway, the main thing is that something happens.

We are now the first and only house on the main street that is set back.
The municipality now says, look over there, we support builders instead of vacancy a modern passive house