Land - soil replacement and embankment

Hello everyone,

we have finally found the "right" plot of land in a new development area and purchased it in December.

Our neighbors have already had a soil survey carried out, with the result that 50 cm of soil must be removed and refilled. Well - that is not so unusual.

Now we have received our property plans from the surveyor. It turned out that our plot slopes 70 cm from right to left over about 22 meters. But much worse, the street level at the highest point of the plot is 90 cm above our plot and at the lowest point 150 cm.

We cannot build a basement because there are water problems in the area.

What options do we have? On the one hand, the soil exchange must be carried out, about 100 m3 + 600 m3 of fill to reach street level. What costs can we expect here?

However, the question then arises whether it is possible to build a concrete slab on this soil (50 cm + at least 70 cm)?

We are currently quite at a loss - not only worried about the costs but also concerned whether we can even build a house under these conditions.

Thank you very much in advance.

Kind regards

Addition: Not 600m3 of fill but 360 m3.

Are the 360 m3 calculated only for the slab or for the entire property?

We are also currently building and had to have about 200 m3 of filling sand installed under the slab. It cost us about 3400,- Eur - so still manageable. You can probably get the topsoil to fill your property from neighbors. If not all properties in the construction area are below street level, they will be glad to get rid of the soil.

The 360 m3 are for the base slab, driveway, terrace, and parking space.

I had just often read that you cannot build a base slab on filled soil :-/. How was it for you?

Under the base slab comes (white) filling sand, which is then repeatedly compacted in layers during installation. However, I am not an expert in this. For the terrace and driveway, you certainly don't have to use the expensive filling sand to reach street level. In our case, after the topsoil was partially removed, a layer of crushed stone was placed and then compacted.

Do you already know more about what needs to be done and how much the [Spaß] will cost? We are facing something similar, but we have more slope and, due to lack of load-bearing capacity, will probably have to replace about 1.20m.