Problems with the building authority due to soil slips and retaining walls!

No one will have a piece of straight land !

I hesitate between "oh come on" and "so what?"

I have 2 boys who want to play football. Sledding in winter is fun too, but the other way around is nicer.

why does no one have "a piece" of flat land?

How big is your plot? Our plot also has a slope and we solved it with two levels (about 60cm height difference), so we have "two pieces" of flat land

Right. I forgot to mention that. From the shooting range to the end of the property (22m) we have about a 3m difference. The idea was a terrace with 80cm L stones, 5m straight garden then a slope and 1.55m L stone.

Now it apparently is not possible.

Does anyone have an idea? In case the building authority is being difficult?

Assuming the building authority does nothing outside of the 0.6 meters:

Then I would go up 0.6 meters with L-bricks at the front of the property (at the street) and 0.6 meters high at the back of the property directly at the boundary, so you already have 1.20 meters. If you slope slightly about 20 cm at both L-bricks (you hardly notice that), then you can easily bridge 1.60 meters with that.

The remaining 1.40 meters could be managed over 2 levels with a good garden plan. If you go 0.6 meters lower from the first level to the second level, that would be about a 4% slope over 20 meters length (so 4 cm high per meter), which you do not notice in lawn areas.

Attached is the actual idea. Hope the resolution is okay