Foundation for retaining wall 1.5m high made of large ashlar stones.

Congratulations, that seems very affordable to me.

You think so? For it being "only" earthworks, I find it rather in the upper third. In the end, it was just excavating, putting in frost protection gravel and compacting, and later digging and connecting the drainage. Unfortunately, due to the poor soil, it was the only acceptable option. We could have done a strip foundation, but then we would have had to completely replace the soil inside as well. The floor slab came from the [GU].

This is how the whole thing looked without the house.... Amazing, when I think back now, only 1.5 years ago..... everything was so exciting!

You think so? For it being "just" earthworks, I already find it rather in the upper third.

We had more than ten times that with the concrete slab. Even without a basement.

The foundation for the house is exclusively made of frost protection gravel, compacted in layers. The minimum depth above the former terrain is 1 meter, due to the slope we are about 2.40 meters deep at the lowest point. The entire earthworks including drainage and everything related cost us €24,000.

That exactly answers my question. Thank you very much. I am facing the same "problem" and am still unsure whether perhaps an extended strip foundation could compensate for this height more cost-effectively.

We had more than ten times that with the foundation slab. Even without a basement.

You had over 240,000 euros just for earthworks and the foundation slab??? A quarter of a million???