New Single-Family House - Cost Calculation

Maybe it will have to be dug deeper after all, due to poor soil investigation reports, etc. That would of course also lead to more backfilling and so on.
But back to the topic of "below street level..."
But your house should be at least at street level, right?
I would strongly recommend that. And I assume a thousand won't be enough for the filling...

Yeah, then it's fine. Add 50 to your calculation and everything is good

Yes, the house is calculated above street level.

Okay, so I'll adjust the value. Thanks for your thoughts!


And where should I allocate the "50 on top"? Is that a pure estimate from you or do you have indications?

It's the missing buffer. None of the trades will cost what you have listed there, and none will be cheaper. With 20 trades, you have on average an extra 2000 each, then you have 40 more. 10 more as a buffer for unforeseen events.

It will happen that way, believe me