Intercepting higher neighboring plots: L-shaped stones, etc. - Tips

How high is the house now? Finished floor ground floor and terrace?

I can understand that, nobody likes to give away land. But it won’t work completely without it. With little space, I would tend to go towards a heavyweight wall. With L-stones at that height you lose almost a meter because of the footing. Blocks measuring 40x40x80 cm would then be 3 stacked but probably doable with 60 cm space loss. Since the joints are permeable, you can also save some space with the drainage behind. Alternatively, something cast directly on site should work. Where we always go on vacation, the neighbor put one directly on the boundary. But you also lose half a meter there because a drainage strip is needed behind it.

Yes, they have changed, among other things because of my husband, who did not want a steep driveway. The problem is not really the heights, but the fact that I have to/can catch without having to interfere with the neighboring areas.

That is over 60 cm deeper than I had suggested back then.

I would now also implement the proposal with the retaining wall moved 1 m into the property. But with a 1:2 slope cut at the top towards the south and west sides.

Of course, you could also move it to the boundary, but then it gets really expensive.

Can’t you just fill up the plot?

The house is already standing. She wants to go deeper. So why fill up? In my opinion, your suggestion makes no sense.