Interpretation of soil investigation for construction

So, base slab... let's make it simple. The fillings up to 1 m should be removed. Insert geogrid and fill with frost protection 00/32 or 00/45. MIN. 50 cm overlap and then chamfer at 45 degrees. At the NHN level, that should be sufficient for frost safety. But that should also be stated in the expert report.

Seal base slab according to DIN 18533 W1.1-E (ground moisture).

Drain the roof surfaces into the sewer, you won't get around that.

You can then assume bedding modulus at about 15 MN/m³.

So, have to put kids to bed now, consider what else is important. But that would be my recommendation.

Hello WilderSueden, The soil survey was done by an engineering office for geotechnics. But maybe I also misunderstand your question? Are you interested in which office actually did it?

I had the same question. It was apparent that it is not about a specific plot of land. Therefore, it was assumed that it is a basic soil report of a new development area, where usually quite a few houses are to be built. Then the report would not be worth much, because it is too general. One is advised to commission their own report. However, this report has the quality of an individual one.

The plot itself is being sold by a developer who wanted to build 2 single-family houses on the land.

Then he would be your contact person. Is the house offered by the developer at a fixed price including earthworks?

the soil survey was done by an engineering office for geotechnics. But maybe I am misunderstanding your question? Are you interested in which office actually did it?

It is more about the fact that one (if one knows ;) ) can usually also obtain a soil survey from the municipality that they did for the development. You don’t build a street just on a whim. Of course, the samples are somewhere in the area and quite certainly not where your house is. Or you got the survey from some neighbor. Here we are talking about a developer; you don’t build but buy a house. Accordingly, extra costs due to the ground conditions are not your problem. The developer has to calculate that into his offer. By the way, you also have no influence on the type of foundation here; the developer decides that. You only have to check, or have an expert check, that no shoddy work is done.

As the OP writes, it is most likely not a genuine developer within the meaning of the Building Code, but a disguised developer, i.e. a general contractor who somehow acquired a plot of land that he is selling with developer obligation. But there will be a separate contract for the construction of a house. So worst of two worlds, paying real estate transfer tax on the house, but still being the builder with all obligations already during the construction phase (on the construction side). Unfortunately, this model is very common and said general contractors still falsely call themselves developers. No idea how this behavior has not yet been identified as a circumvention of applicable law. If I run a red light through a parking lot, I can get a point too.

Here we are talking about a property developer; you do not build, but buy a house. Accordingly, additional expenses due to the building plot are not your problem. The property developer has to factor that into his offer. By the way, you also have no influence on the type of foundation here; that is decided by the property developer. You just have to make sure, or have an expert check, that no botching is done.

As the OP writes, it is most likely not a genuine property developer in the sense of the Building Code, but a disguised property developer, i.e., a general contractor who somehow got hold of a plot of land that he sells with developer obligation. But there will be a separate contract for the construction of a house.

I do not share your interpretation, but read

The plot itself is being sold by a property developer who wanted to build 2 single-family houses on the plot.

as a plot that is up for free development by the OP on his own initiative; only the seller / previous owner acted as a property developer (here, however, not part of the transaction with the OP). The current owner has given up the plan to sell it developed and is now instead marketing it through resale as an undeveloped plot. Currently, many plots are coming back on the market because a commercial buyer has abandoned his development project. With such small units as here, it does not then go to a depreciation machine holding company, but to a private “end user.”

Ah, keyword wanted, ok. Yes, that is very possible.