Excavation for the basement, your opinion on the cubic meters

I really didn’t have the relaxation factor on my radar at all. Thanks for your hints!

That’s really messing up our calculation for posting "civil engineering" right now :(
We had estimated about 20,000 EUR, now 40,000 are set.

And now pay attention: how is the terrain supposed to slope later if the highest point on the property is higher than the house?

If you also have the terrace removed, it will be even more

as can be seen in the picture of the first post: The slope falls away from the building. And as also written in the first post: The basement protrudes 1/3 out of the terrain. So for leveling, nothing needs to be removed, but rather added....as has already correctly recognized. There is even quite a lot that needs to be filled in, which fortunately (and according to the soil report) is not a problem. The soil is largely suitable for this. So we will only have to remove a fraction.

And here the circle closes again. was already very, very accurate with his information. But if I now take the material out and build it up again somewhere else... yes, then we ask ourselves why our disposal costs (including landfill, etc.) are close to 9,000 EUR. Even the working spaces can be refilled with excavated material. There are no special requirements here since there is no drainage and no water-proof basement.

I will continue with the inconsistencies. Maybe you can help me open my eyes a little on this point as well (like with the loosening degree):

[*] Basement dimensions: 8.20 x 10.
[*] Soil report says: The foundation cushion should be overall 25 cm thick (10 cm 0/45 gravel + 15 cm capillary-breaking layer) and overhang about 40 cm.
[*] Makes approx. 9x11x0.25 and with these values one can calculate approximately the gravel demand in tons.
[*] Additionally, a crane area must be set up: 8x12x0.3

Altogether I come to a demand of just under 100 tons. In the bill of quantities, it is almost double (180 tons). I hope the civil engineer has enough time tomorrow, this will be a long phone call :-/

With us, the cbm removal and landfill of excavation costs 20€. 15€ of that is landfill and that is for Z0 soil. What does the cbm cost you?

25.40€ are budgeted, also for Z0. We are building in NRW, more precisely in the Märkischer Kreis. Unfortunately, I do not know which of that are landfill costs.

€25.40 are budgeted, also for Z0. We are building in NRW, more precisely in Märkischer Kreis

Unfortunately, I do not know which part of that are landfill costs.

Ouch. With how many cbm the deep blue one calculates and how he comes to that, you can tell us tomorrow. I'm curious.

I have a similar situation, but I can fill and compact more, because I set 80-100cm L-shaped stones and bushes on the L-shaped stones another 60cm on top. Then on 25m, 1m high L-shaped stones come around the terrace and carport, which are filled and compacted. I estimate there will be 500 cbm of excavation where half will be reused.

So that you have a comparison. Our house is 11m x 8.25m. The structural engineer calculated 395 cubic meters of machine excavation just for the basement.