Costs for basement excavation without disposal

So for excavation and loading/storing we pay €3 per m3. Disposal costs extra.

Installing and compacting material is quite expensive; our current offer is about €25 per m3 with existing material. For example, if compaction with gravel is necessary due to water or similar, costs can be significantly higher if material has to be delivered. This is then not decided by the amount of available material but by the soil report.

The figures are up to date.

Did you calculate the 210 m3 yourself or does it come from a reliable source? It seems clearly too little for a hillside. We have about 300 m3 of working space to be backfilled just for compacting a 3-side basement in a hillside. And those are only the "edges" of the excavation pit…

Better double-check volumes before the nasty surprise with the bill comes.

By the way, I have no clue either, but this topic is currently relevant for us.

But we will, since it’s on a slope and there also has to be fill in front of the house.

Are you even allowed to heap up that much? What does the BP say about that?

3€/m3 seems very very low to me... we had a significantly larger volume of excavation and paid significantly more... however, it was also billed by the hour (excavator including driver).

pay driver + machine by the hour, then you are safe.
calculate with 120-140/h net.
Unless you have difficult ground, then I would do a fixed price.