Building ground - alternative to pile foundation?

the neighbors have accordingly founded through the basement under the non-load-bearing layer.

Complete soil replacement would be an alternative. Cheaper? Well.

A house with a basement belongs on this property. If you don't want that, don't buy it.
Disposal of the sludge can, however, mean additional costs. But now at least you know why there was a gap for 50 years.

You will have no choice but to have all variants....pile foundation, well foundation, soil replacement, basement... offered and calculated through.

We founded with 16 shaft rings each 1.00m and a depth of 4.00-4.50m...

...at the neighbor with a basement, we directly carried out a soil replacement underneath... was a bit cheaper... but of course above all faster.

If you want to know anything about it, just get in touch. However, I work in a construction company... thus naturally planned and executed quite differently when it comes to costs.

Good luck!

The only thing I can think of is soil replacement. It is what it is: you cannot ignore the financial expense. Then the warranty of the GU expires. Do you already own the [Grundstück]?

Well, a house just isn't stable on organic waste.
60k for the basement is great, technology down there, laundry room down there, hobby room down there, wine cellar, etc.
In my opinion, well-invested money.