What is included in the 2000-2500€ per m2?
Plot of land?
Basement?
Sanitary fixtures?
Heating?
Has no one here built a duplex with a prefabricated house manufacturer?
You have to calculate about 2000 euros per sqm of living space (of course, it can be significantly more expensive depending on the fittings), in turnkey construction. Turnkey normally means that the painting and floor coverings in the living rooms still have to be added. The plot of land, the basement, the outdoor facilities, the kitchen, and additional construction costs come on top of that.
Best regards
Sabine