Soil survey at the very beginning

Talk to a local contracting company.
Z0/Z1 does not have to go to a landfill. The soil can also be recycled in other ways and is accordingly cheaper.

For Z2/>Z2 you should become alert if (environmentally) recyclable soil already costs 48 €!

I am also using this thread to get clarity regarding earth excavation:

We are building a single-family house (approximately 10x10m) with a waterproof basement and want to know how high the costs for excavation are.

I can calculate the costs for the disposal site. For us, it costs €8.80 per 1m³ of earth excavation. At about 400-500m³, that amounts to around €4,000.

A construction company told me yesterday:

- We have included the earth excavation in your offer and set it at €36,000. Anything you have been told that is below this is not correct. You definitely have to reckon with this amount. However, the offer only includes: soil class up to 6 and Z0. So just "simple" soil.

He then said something like: You alone have set aside €16,000 for disposal costs, the rest would then be excavation. How the hell does he come up with 16k???

I am now wondering, how on earth does he come up with €36,000??

We have estimated ancillary costs for earth excavation at €20,000 and have so far been told by other construction companies that this is quite well calculated.

What do you think? Could €36,000 be realistic for this project or is that total nonsense?

I am also using this thread to get clarity regarding excavation:

We are building a single-family house (dimensions approx. 10x10m) with a waterproof basement and want to know how high the costs for the excavation are.

I can have the disposal costs calculated. For us, it costs €8.80 for 1m³ of excavated soil. At about 400-500m³, that comes to around €4,000.

A construction company told me yesterday:

- We have included the excavation in your offer and set it at €36,000. Anything you hear that is below that is not correct. You definitely have to reckon with that amount. However, the offer only includes: soil class up to 6 and Z0. So only "simple" soil.

He then said something like: You alone have set aside €16,000 for disposal costs, the rest would be for the excavation. How the hell does he come up with 16k???

I am now wondering, how on earth does he come up with €36,000??

We have set aside €20k for ancillary excavation costs and have so far been told by other construction companies that this is quite well calculated.

What do you think? Could €36k be realistic for this project or is that total nonsense?

Supply and demand ... one thing is the disposal costs. Who will get the soil out and take it away?? Probably not you with the wheelbarrow.