Cutting out the house roof in the garage area - experiences

So after the appointment the following dissatisfied realization:
The general contractor considers it disproportionate to tear off the roof for 25 cm of knee wall. Offers about 4 as a price reduction. That is ridiculous. According to the lawyer, it is also total nonsense regarding the disproportionality. We have an appointment with an expert next week.
What other disadvantages does the missing knee wall have, besides that I have less space in the attic (which is only supposed to be used as storage) and that the roof starts almost directly (after 2 rows of facing bricks) above the window and thus I have less light in the house and it looks cramped from the outside?

I can't follow him there again.

The explanation was that the program automatically draws the garage 25cm lower than the house. In the plan, however, it is only 10cm.

GU sees it as disproportionate to tear off the roof for 25 cm of knee wall. Offers about 4 as a price reduction. That is just laughable. According to the lawyer, it is also total nonsense to talk about disproportionality.

Brazen nonsense. The mistake and the responsibility for it lie one hundred percent on his side. Rebuilding the garage lower including redesigning the driveway and changing the drainage will cost you far more than this consolation prize. And your argument about light and aesthetics is not wiped away by that. Nevertheless, it is not certain whether you will ultimately win in the first instance, and further construction is stalled. I would consider the additional effort of cutting out the roof at his expense plus 25 thousand for 25 cm forgotten knee wall a good mediation result.

The explanation for that was that the program automatically draws the garage 25 cm lower than the house. But in the plan it is only 10 cm.

The dimensions of his garage avatar/dummy should not be taken at face value in planning; he has to work with the real measurements. They have nothing to do with the type of door construction. Even though the context is preposterous, with

In his opinion, we would have had problems with the height anyway because we are using a pivot door. But that was clear to him from the start.

he clearly admits that he was always aware of the actual height of the garage. Stone, tar, feather, and then do the whole thing again :-)

There is news... according to the general contractor, no knee wall was planned, but the 25cm mark is supposed to represent the bending point. Is that true or is he trying to fool us? In his opinion, the height problem now comes from a larger roof overhang, which he gave us as a gift. According to the plan 50cm, currently it is 75cm. He would have done that on his own because it looks nicer on the bungalow. How is a knee wall represented in a drawing? Is what he tells us true?

Whatever is supposed to bend off from something. In the drawing, a hatch pattern looks like it is meant to represent a row of stones or something similar. But even (just) a foot purlin would be possible there, nothing is really clearly visible.

25 cm more roof overhang at a 25° roof pitch naturally causes the eaves to shift by almost 12 cm.

A knee wall - which, however, is rather uncommon without residential expansion and also not typical at this height - can be recognized as a wall section under the foot purlin (unfortunately not really visible in this drawing). But lying on the floor of the attic, you can see if there is any "masonry" under the roof structure. The knee wall is measured from the top edge of the floor (only inconsistently, whether raw or finished).

Is this the drawing for the building permit or for the execution planning?