Base plate incorrectly positioned

Really? I hadn't even noticed that the building authority was there. Only the surveying office was there more often. The general contractor had commissioned them before construction started, after demolition to check if the old walls fit. The plan and reality didn't match, then it was checked if the house fit as planned, the boundary distance was tight. Maybe that was enough. Then shortly after moving in, everything was finally surveyed.

So there are already two aspects, location and quality, that rather speak in favor of "doing it new".

Wrong service in the wrong location – the entrepreneur seems to have the attitude "minus times minus gives plus" :-(

I would choose option 1.

So the decision has been made: demolition and reconstruction. Thank you all for your opinions!

and he does that with ??

and he does that with ??

He has to. He received plans beforehand but did not work according to them.