Land modeling and slope stabilization

Hey,

we will soon have our plot excavated. We would like to remove about 20cm below street level (=10cm above finished floor level) and fill it with sand/topsoil. In areas where the driveway/parking spaces/terrace will be, rather 80cm.

At the southern property boundary, we need to construct a 60cm slope retaining wall. (We are going 60cm deeper, the neighbor probably 40-60cm higher.)
My first thought was actually L-shaped stones, but you would basically have to "bury" them towards the neighbor. We thought that gabions might also work. When I google gabions and slope retaining walls, it seems quite elaborate (2 elements, angled on top of each other, frost protection on the earth side).
Can’t you just set the gabions straight on a foundation? It’s only 60cm, or does that not make a difference?

Thanks in advance for your tips

Why not a pretty natural stone wall? With some space on top for [Blaukissen], [Schleifenblume] & co...

It must be very nice! But probably not cheap?

I think it won't cost you more than with L-stones or gabions (to my knowledge, both are not cheap...) We paid about €3500 for 7 meters, 60 cm high in total.

Price-wise from inexpensive to expensive => natural stones (split/rough) => L-stones (reinforced) => gabions.

But if you go deeper and your neighbor raises, gabions and natural stones become irrelevant anyway => So you should talk to each other and plan this 120cm height difference together.

I would also first talk to the neighbor and look for a joint solution. It should be in the mutual interest to find a reasonable solution.