Assessment of an offer for earthworks

Hello everyone,

this year we will build a single-family house with a slab foundation in northern Bavaria. For this, we have received an offer for the earthworks, which seems excessively high to us in some positions.
We would greatly appreciate a brief assessment!

The soil class is between 3 and 4.

here are the relevant key data:

- Delivery and compaction of frost protection gravel 0/32 for house subgrade and driveway: 700 tons, 24,500 €
- Excavation, removal and disposal: 405 m3, 7,690 €
- Topsoil removal and lateral storage: 505 m3, 750 €
- Excavation of channel, foundation and pipeline trench: 77 m3, 3,650 €
- Installation of split layer 2/5: 108 m2, 1,320 €
- Installation and bedding of KG pipes DN100, separate system: 82 linear meters, 4,250 €
- KG pipes DN150 for sewer connection up to 3 m depth 11 linear meters, 594 €
- Filter fleece GRK3: 200 m2, 785 €
- Deliver and install monolithic cistern approx. 8 m3 with McClean filter and animal protection: 2,930 €
- Drilling into existing inspection shaft 2x, drilling connection seal, creating slope: 700 €
- String line framework: 760 €
- Surcharge for structural engineer preparation: 445 €
- Lay stainless steel earth conductor in excavation and connect to potential equalization in slab: 55 linear meters, 964 €
- Multi-utility package from Hauff with 4 entrances: 1,255 €
- Cable protection pipe DN 90: 30 linear meters, 520 €
- Cable protection pipe DN 75: 12 linear meters, 180 €
- Connector multi-utility empty conduits to cable protection pipes: 4 pcs, 360 €
- KG connection funnel AT from Hauff as floor penetration: 6 pcs, 410 €

Subtotal: 52,063 € —> with VAT approx. 62 thousand €

Slab foundation (KFW40) with VAT: 24,500 €

Total price approx. 86,500 €

Could be "normal" prices - get a second offer, that will help you more than if everyone here tells you what they paid....

Gd

700 tons of gravel 0/32? 700? But the price is right. We paid just under 500 for 20t of recycled gravel, including installation and compaction. Saxony-Anhalt. Scaled to 700 tons, that's 17,500 EUR. You need fresh gravel, which is more expensive, plus it also depends on the delivery distance, so how long it is. 700 tons, that's 30, 35 trucks. And Bavaria is Bavaria, so more expensive. KG pipe also fits, here it was 45 EUR/m², delivery and installation DN100.

I found the total sum shocking, but calculated per item/unit price it is okay. Roughly like my prices two years ago, so rather even cheap. The 700 tons I also find crazy.

700 tons of gravel fit well with 400 cubic meters of excavation. I think there is a certain slope here that is now being leveled with a large amount of gravel. €35 net per ton of gravel seems like a steep price to me, the gravel plant probably charges only half of that with delivery free to the construction site.

But 500 cubic meters of topsoil seems a bit much to me. We're talking about approximately 1500 sqm of area to be worked on.

I think it's crazy that the amount is half of my house price, the standard earthworks were included.