ᐅ Additional construction costs for earthworks according to the soil report

Yes, it will go in that direction.
Then you need to compare it with your contract; you only pay separately 0.50 per cubic meter (0.50 per cubic yard) for excavation.

What about the finished floor level? The surveyor has "approved" this. If it fits into the surrounding area, you might be able to plan the slab at a lower level? That would reduce the amount of material delivered... However, this would affect the planning significantly (considering exterior work, etc.), so it might already be too late for that.

Have the general contractor provide you with an offer, referring to approximately 5,000 €... I’m curious whether it will be a 1 or a 2 in front of that number. If in doubt, get your own offers. The general contractor’s service (removal of 30 cm (12 inches) of soil) is minimal; if necessary, contract everything yourself, including most of the disposal.

Good luck!

Osnabruecker schrieb:

Yes, it will likely go in that direction.
You will need to check this against your contract; you only pay separately 0.50 per cubic meter (0.50 per cubic yard) of excavation.

What about the top edge of the finished floor? The inspector has "accepted" this. If it fits within the surrounding area, you might consider planning the foundation slab a bit lower. That would reduce the amount of material needed for delivery... However, this affects the overall planning significantly (including landscaping, etc.), so it might already be too late for such changes.

Have the general contractor provide you with an offer, referring to the approximate 5,000 euros... I’m curious whether it will actually be 10,000 or 20,000. If in doubt, get quotes yourself. The general contractor’s scope (removing 30 cm (12 inches) of soil) is limited; if necessary, subcontract everything yourself, including mostly disposal.

Good luck!

I really hope I won’t need more than the 10,000 euros.

Richooo schrieb:

Well, I hope I won’t need more than €10,000.

That sounds possible.
We had to replace soil over an area of about 10 x 15 m (33 x 49 ft) to a depth of around 80 cm (31 inches). The contract specified 30 cm (12 inches) of stripping, but without removal. There was a small basement, and its demolition and backfilling were separately agreed upon. Otherwise, we had a mix of sand and debris (from a previous house on the site; in the past, soil and waste were often buried rather than removed if they didn’t cause problems). We paid approximately €5,500 for the soil replacement.

motorradsilke schrieb:

That could fit.
We had to replace soil to a depth of about 80cm (31 inches) over an area of roughly 10 x 15 m (33 x 49 ft). According to the building contract description, only 30 cm (12 inches) of topsoil removal was agreed upon, but without disposal. There was a small basement whose demolition and backfilling were agreed upon separately. Otherwise, we also had a mix of sand and rubble (from a house that used to stand there before ours; in the past, soil disposal rules were less strict, and leftover materials were simply buried if they didn’t cause any issues). We paid around €5500 for the soil replacement.

Thanks, that sounds reasonable.
Our construction advisor said that because of the missing height reference, we can’t get a concrete offer yet and only after planning is completed. But my father knows some civil engineering companies and will just request a quote for replacing soil over 10 x 12 m (33 x 39 ft) to a depth of 80 cm (31 inches).

My father once easily obtained a cost estimate for an 80cm (31.5 inches) excavation over 110m² (1,184 ft²), including backfilling and compaction. The price was around €5,300. It should be acceptable.