When I live in it, I have snow-white hair. Why do people do that without asking. And now comes the effort, taking everything out again, cutting, putting it back in. Who pays for that.
For us, that was pure deliberate intention at that point. Therefore, it fits there exactly as it is.
What does the construction specifications say about the windowsills?
Even if you don't like it, this might possibly be a rocky road. Because he did not violate any agreement and the windowsills are apparently undisputed.
Nevertheless, I’m keeping my fingers crossed for you.