Height reference point: top edge of adjacent access road?

Hi everyone!

I am completely new here.
My husband and I are planning to build a house next year. We already applied for a building plot in the next development area at our municipality 2 years ago and this time we actually got one assigned! It's even a real gem... However, together with the offer proposal we also received the detailed information. - This dampens our joy a bit.

Actually, we wanted to build a house in the city villa style, since we are both total opponents of sloping ceilings. But we have no knowledge about building, regulations, etc. At the development plan it is now specified that the maximum number of floors is 1 and the eaves height may be max 4 m and the ridge height max 9 m.
So it is clear that we cannot build a city villa.
Now we have decided on a house in the classic style, with 2 captain's gables that protrude 1 m as bay windows. This way we have at least a few less sloped ceilings on the upper floor.
Now I just read at the height reference point:

"Lower reference point for determining the eaves height, ridge height and base height is the upper edge of the adjacent access road, measured in the middle of the street frontage of the plot."

What exactly does that mean?
What will the knee wall on the upper floor look like then? Can we even make it 1 m high?
I somehow don't understand that...

Anyone here who knows an answer?

Best regards,
Milanni

It's actually quite simple. The heights are not measured relative to your property or house, but relative to the street level.

Example: You raise your property by two meters, then start building. Eaves height calculation based on street level = you lose the first two meters because you have raised the ground (there is not even a habitable ground floor height yet). You bury yourself underground and want to reach your front door with four steps down. Then you might gain one meter, and the stamp can be very high (four meters eaves height from street level + one meter that you go down). These are, of course, completely exaggerated examples...

How high the knee wall can be exactly will be told to you by an architect based on your wishes.

Ah, that actually sounds quite simple and logical! -Thank you!
Tonight we are meeting with a potential developer, let's see what advice he gives us.

Thanks again and best regards!