Costs for soil replacement, soil survey for construction ground, clayey

And the last question again, so it doesn’t get lost... Where should the drillings be done if the building window is not yet fully determined?

Is it specified by the municipality/city where exactly the house should be located? So, even if the dimensions of your house are not yet finalized, is there a building window from the municipality?

Otherwise, ask the soil expert. They have their experience with that.

Or you have the soil survey done once you know how big the house will be and where it should stand. Unlike plots of land you want to buy, you already have one. And you want to build on it. Therefore, the measurements could also be taken later.

I made a mistake with the building envelope! Of course we have it, it is marked on the development plan. The building plot is at the end of a dead-end street. We just have to stay 5 meters away from the street, the rest of the property can be freely built on, according to the law, of course. I will now look for providers and have one created, thanks to you I now have all the information.

The soil survey should be done at 2-4 key points of your house.
It's less about whether your house will collapse, and more about preventing excessive settlements.
Plan your house, have the soil survey done within the foundation slab, and give the foundation recommendation to the earthworks contractor.
By the way, it's worth comparing here. The construction company's own might be much more expensive than a local one. I wouldn't outsource the foundation slab. If something goes wrong there, you're the one to blame... for example, a few centimeters too far to the left, or the sewer connections not fitting properly.

Well, actually you do a soil survey before you buy a plot of land. That's probably too late, so you can wait a while longer. With us, there were almost 10 months between drawing up plans and starting construction, so plenty of time to order everything.

As mentioned, the building plot was inherited and it is also certain that if we build, we will build there. So the matter with the appraisal was settled beforehand.

Hello,

I asked the company about the foundation slab today; they don’t need the soil report at all.

Then make sure you get this statement in writing!

The following excerpt came:

The creation of a soil report specifically for your building site is recommended, in order to be able to concretely define any necessary measures regarding the foundation.

That means one should have the report made so that one can still be on the safe side and act, right?

That is a clause with which the concrete contractor frees himself from any recourse claims on your part, if the foundation – due to a missing soil report – goes sour, so to speak.

Best regards from the Rhineland