Permeable traffic areas in the building application

Can anyone say how it works with the information in the building application if permeable material is specified for the driveway or terrace, or even something concrete like eco-paving, and one wants to use a different material afterwards, i.e. make it sealed? Does one then have to submit some kind of application again? And who later does the calculation for floor area ratio, wastewater fees, etc. – the area is different after half a year than originally planned in the building application, since not everything can be included as it will later be designed, like driveway etc.?

Can anyone say how it works with the information in the building application, if permeable material is specified for the driveway or terrace or even something concrete like eco-paving and you want to seal it later with a different material? Do you then have to submit some kind of application again? And who later does the calculation for floor area ratio, wastewater fees etc. - the area is different after half a year than originally planned in the building application, since not everything can be included as you later design the driveway etc.?

Your building permit is actually binding. In my opinion, you cannot simply change something. For that, you need an addendum to the building application - that's what it's called here and it cost 90€, also takes only half the time.

Best regards in brief

1) Yvonne is right. It is binding. 2) Who controls that? Usually no one. Unless a neighbor complains. Then they have to take action, of course. 3) ----and what would come then? In the worst case, a demand for dismantling. Or a small fine. Or a request for retroactive approval of the facts, if it’s only about peanuts. Example: Mr. S. has the right to build on 150 sqm on a 600 sqm plot with a floor area ratio of 0.25. The house is 10 by 13, which equals 130 sqm. That’s not enough for a terrace and driveway, only 20 sqm remain. He decides to apply for a 20 sqm terrace and depict the rest as a gravel surface bound with water. The path to the front door is blocked due to allowed floor area ratio being exceeded. Mr. S. doesn’t care about this at all, generously asphalts the driveway, makes a huge terrace of concrete pavers in lean concrete. And a wide path to the front door as well. It’s raining cats and dogs. Water runs from Mr. S.’s property by the bucket over to the neighbor. The neighbor’s plants are washed away. Etc. The neighbor talks to S. S. is completely unreasonable, what do your bushes have to do with me? Then the neighbor gets angry – and now there can be trouble with the building authority because the neighbor says, no, I won’t accept this. Specifically, there has already been a case in our area where the building authority stopped excessive paving because a neighbor complained. Karsten

Regarding 3)
That can then get really expensive with a lawyer and everything.

Regards, Yvonne

Whoever submits the building application should be able to read development plans (including textual determinations) and not state more in the application documents than what is regulated. What is stated there is then considered agreed upon, and secret subsequent changes endanger the validity of the approval.

But you can see that in the textual determinations. There is a wide range between municipalities: some make a table indicating which material is credited at what height; others do not distinguish and instead allow a 50% floor area ratio exceedance for the driveway and similar ancillary facilities.

So our house construction company has done the building applications. We were not asked what type of paving or terrace we wanted to have - on the contrary, I even said that the terrace should definitely be sealed and the answer was that they always write permeable in the application - because the building application only concerns buildings like house and garage.

So it's as if you don't have to specify a terrace at all. Somehow this contradicts itself here.

What happens if you don't specify a terrace and build one later? You don't need a new permit or a supplementary application for that, do you? Why should it be critical if something is stated now and then done differently?