But the eaves height according to "your" development plan does not refer to the ground levels, but to the upper edge of the finished ground floor slab, which is set at a maximum of 107m above NHN for your plot. In this respect, the terrain topography does not matter to you. Only your ground floor height needs to be fine-tuned. Therefore, in my picture, the upper floor must be declared as the ground floor. Whether this will be approved, I do not know, but at the moment I see nothing that should speak against it.