When it comes to the question: I have no idea. I just discovered this number on the drawing. With the D in front of it. Or was it about another question?
So the house further forward? Basement and garage levels even lower? Otherwise it would be even steeper.
Exactly. If the manhole cover is the reference point, what is it supposed to stand for?
The neighbor also has the garage in the basement. Show some pictures of how the property looks.
Name the development plan. With such selective information, you can do little.
Wall heights in the attic are limited. That’s confusing, because with a gable roof you can’t comply with that.