Single-family house with approximately 160m2, basement + ground floor + upper floor with knee wall

Yes, according to the development plan you can build 100% over. However, the terrace would then be included in the floor area ratio. But garage and driveway not?

See below.

Regarding the kitchen, we actually wanted a closed one to contain the smells and noises

Smells and aromas go through doors. Do you cook so badly that it stinks?

It became a slightly higher garage so that the VW bus fits in, which we don’t have yet

But that is not allowed.

Sorry, I checked again. You are allowed to build 50% over, which results in a factor of 0.45, corresponding to 164m2.

Yes, I also reconsidered the 100% I mentioned... 50% is of course more plausible.
Nevertheless, the terrace is in the border area...

Who is your consultant? Where is the architect?
I grant you your playfulness, but with this tight situation you can’t avoid a professional!

The building window specification seems to me to go too far. On what grounds are you treated differently than the northern neighbor, i.e. why do you have to build further away from the street / accept a longer driveway / have a larger front garden but a smaller west garden?

The masonry empty conduit with the maintenance flap would be expected more in an architect-designed house, if at all. The attic has no access.

Give an insight into the genesis of the design from V1 to V7.

I think that the original development plan might be interesting here

We don't even know whether the garage window is a suggestion or a premise!

For the kitchen, we actually wanted a closed one to keep the smells and noises out of the living room. Dan

Controlled residential ventilation and a range hood are enough to deal with odors. Dishwashers and refrigerators nowadays are "whisper quiet." My husband constantly opens the running dishwasher because he doesn't realize it's on. Otherwise, I don't know what you mean by noises.

Even at the risk of being wrong again:

Partly, partly. The floor area ratio will definitely be exceeded, even if the terrace is incorrectly counted as an ancillary facility. However, the stated plot size is also not correct, as there are no decimal places in the cadastral record (area according to the cadastre or land register).
Floor plan I = 10m * 11m + 7m * 3.5m = 134.50m²
Floor plan II = Floor area ratio I + garage + driveway = 134.50m² + 22.44m² + 37.70m² = 194.64m²
Floor area ratio I = 134.50 / 365 = 0.37 allowed 0.3
Floor area ratio II = 194.64 / 365 = 0.53 allowed 0.45

An uncovered terrace does not trigger any setback areas.

The T6 is just under 2m high unless you build something on top.

Kitchen
Mini pantry out. That also fits in a cabinet. I am a fan of open kitchens. For me, it only has advantages.
Controlled residential ventilation and a modern extractor hood help against odors.
You no longer hear noises from refrigerators and dishwashers.

Take a look here

The kitchen can be open or closed