Construction costs rough estimate, realistic or not?

.. pure polemics on your part ..

Hello,

...It is good that you write from your own perspective; anything else can have fatal consequences for naive builders. Building without a soil survey is not only foolish but also expensive when it turns out that there are surprises hidden in the ground. No one then takes responsibility for the inevitable botched work!

Absolutely correct! Those who try to save money in the wrong place, however, do not die out.
A planned car dealership was supposed to be built without a soil survey because everything around it apparently seemed stable.
A nasty surprise during the earthworks, a tuff hole. Now the construction costs marched to unforeseen heights. Meanwhile, the cost of a soil survey is peanuts.

best regards

NB: Advice from anonymous "experts" without guarantee and warranty should rather be understood as an incentive to dig deeper. They are not suitable as a basis for decision-making for a significant investment; that would be very naive!

A planned car dealership should be built without a soil survey!

.. you are also engaging in pure polemics here and comparing apples with oranges ...

I think this was about a cost estimate

… my God, you are all writing nonsense here …. one gets the impression that only desk workers file their contributions here … the soil conditions in Germany from Sylt to the Zugspitze and from east to west are so different that one cannot simply judge in general, > one absolutely must < create a soil report, the respective conditions are always decisive, and irony on: "if the geologist hits an aviation bomb with his drilling device, the soil excavation is also off the table!" … of course it is advantageous to create soil reports beforehand if there are possibly doubts about the foundation, but such a soil report can also be carried out during the earthworks, which in most cases is even advantageous! The experience on site is decisive and not the office desk!

However, a soil survey should be done BEFORE buying a plot of land.... otherwise you buy a pig in a poke. With the earthworks, it's usually too late, you have the financing secured, and if another €20,000 comes up somewhere, it can get tight. That's exactly what happened to us. We had €30,000 withheld as a buffer because we suspected more costs would come. But we bought the land knowing that no matter what, we would take it because it was a bargain. And after a year it was the first time everything fit.

And additional financing unfortunately doesn’t always work out. Even though we earn very well and brought almost 50% equity. The banks do what they want.
And that’s exactly why you should definitely have the soil survey done beforehand. In the worst case, you have wasted €800. In the end, that won't matter anymore. You then negotiate it down later with the craftsmen.