Opinions on window parapet height sought

Nothing easy!

You submitted the building application including, among other things, a defined facade. This also includes the number of windows as well as their height and width. If afterwards - that is, after the building permit - there is a deviation of more than a few centimeters, a supplement is required.

Rhenish greetings from the road
Construction expert

And now? Apart from the fact that it does not help me further in the questions

It should also be noted that window areas must be 1/3 of the square meters of the room. It must of course be considered whether this is still met due to the reduction.

That is nonsense - sorry...

This is a regulation

Then show me - but it will be difficult