I will try my hand at a sketch this evening or rather expand the existing sketch from the construction company.
Here are first some photos that might clarify the challenge a bit. I have also inserted a small overview of the viewing angle each time to make it a bit clearer what is being seen. It is around 4:30 PM.
View from the southwestern corner towards the north, here you can see the embankment. The road is supposed to be built on the right, which will initially go steeply upwards.
View on the western side of the property towards the north. If the carport were in the east, it would look like this:
There wouldn’t be much left of the garden then, actually only the northern and eastern sides. The trees on the left are quite tall; probably they would have to be trimmed somehow anyway (they are willows).
For completeness, here is the view towards the south of the old building, in which there are partly apartments and partly still to be built:
If the carport were in the east, the house would end at the dirt mound (cf. previous picture, I am standing on the theoretical terrace).
If the carport were in the west, the house would end at the tree on the left, roughly flush with the projecting edge of the old building.