Saw a turnkey house at a very affordable price

You should always keep in mind with the prices that BaWü is quite "expensive" compared to, for example, more northern federal states.

@Mycraft and Milambar: In which federal states did you build?

At least I also come from BW, if you will, even from the Heilbronn region. € 1500/m² is quite accurate for our turnkey KfW 40 house.

Lower Saxony.. and I know 100% that after Bavaria, for example, apart from a slightly higher transport flat rate (approx. €2000), nothing more would be added if we had built there

correct... soil survey and corresponding additional costs excluded

Berlin...and indeed within the city...but here a house just one street away can cost significantly more...

@Kubus: Which company did you build with? That sounds interesting.

Not to be misunderstood: Fortunately, it is not my house.
It was an open viewing of a construction company that built the house on behalf of a client.

I recently applied for a special permit to possibly build in the second row.
Therefore, I have been looking around a bit lately and came across the company. However, they are already excluded for my possible building project.