On the other hand, everywhere it says "Clarification and Adjustment". At first, this seems factual and friendly to me, so that the building authority could actually be satisfied with a proper application and there would be no fundamental problem.
There is undoubtedly a deviation here between the reality observed on site and the file status. The administration initially suspects no one's intention in this and does not make a fuss about the technically speaking forgery of documents in the form of the knowingly factually incorrect application (the owner and his planner were aware that the property still consisted of building remains). "Clarification" therefore means here "reconciliation of the actual situation and file status". Regarding the procedure, the authority does not restrict the affected party – they thus have the choice between three interpretations: "make understandable why, in your opinion, the property is already completely cleared as stated in the application", "remedy the deviation by applying for and approving the demolition of the remnants", or "explain how the remnants are to be integrated into the future building ensemble". "Adjustment" means the supplement (in option II) or the replacement (in option III) of the currently factually incorrect application. The fourth way (= to find and punish the spiteful informer) would not only be illegal, but (because it would not rein in the bureaucratic horse) also pointless. I hope the poetry was understandable even for Frau Zahnärztin.