Two "site plans": soil expert, surveying office, interpretation?

I would place the house rather about 30 cm lower, so at 139.90

Then it probably won't work without L stones!

I tend more towards tapering off than steps.

I would see the house perhaps about 30 cm lower, so at 139.90 I tend more towards letting it run out than steps.

Me too, at least 30 cm lower. CP at 139.20 Level a surface around the terrace and adjust with slopes 1 / 2 to the property boundary. A round terrace???

A round terrace???

Half-round. I prefer round shapes to angular ones. :) But the dimensions and the shape of the terrace are not finalized yet ... I hoped to be able to consider everything only once we are living in the house. The paths are also supposed to have a rather curved shape.

Everything that is round, semicircular, or curved costs more to build. It only gets really fun when you later plan a [Überdachung].