Planning of multi-family house 1200 €/m²

Why not?

The lower SP a bit steeper, then you can get one more SP.

DG ceiling height 2.30 does not work. Minimum living space height is, in my opinion, 2.40, of course better higher.

House number 67a, is that a flat roof?

I thought you also wanted a flat roof. I would have set the 3rd floor back a bit, like the mansard roof in the picture. About 1-2 m. That’s how it is solved here in the community with the newly permitted flat roofs. The additional effect is that you have fewer problems with setback areas / wall heights.

The thing with the parking spaces is a good idea.

The 2.3m ceiling height is the maximum possible if it is not supposed to be a full storey.

Do you mean the 60A? That is a very flat shed roof. But the municipality definitely does not want a flat roof.

But the community definitely does not want a flat roof.

Did she exclude that in the development plan? - Building law is not a wish concert even for the building authority. Often it is only a few degrees that "distinguish" a shed roof from a flat roof.

Do what I already suggested, a pseudo-mansard roof. If the recessed floor would then be a full floor, accumulate storage rooms there with a maximum room height of 230 cm.

For the storage rooms, I would make a partial basement.