Hi! We live in northern NRW and moved in almost two years ago. At some point, a few months after moving in, a man from the building authority showed up unannounced at the door and asked if he could do the final inspection. However, he only looked at the escape route from the upper floor and criticized that a step in front of the escape window was missing (which we had omitted because it looked so stupid). I then retrofitted the step and emailed a photo to the building authority. Shortly afterwards, a letter with a stamp arrived and that was it… Nothing to worry about. The fact that we had already been living there didn’t interest him at all.