realistic construction costs for a semi-detached house (different construction start)

You haven’t taken into account the real estate transfer tax on the property, have you? + Notary etc.

Fortunately, in Bavaria it is only about 5% in total (notary, property tax, land register) and applies here to the pure land price if it is not yet developed. So not 4000 euros.

are fortunately only about 5% in total in Bavaria (notary, property tax, land register) and applies here to the pure land price if it is not yet developed. So not 4000 euros.

You have cheap prices in Bavaria

I would talk to the neighbor again and see if you can find a mutual compromise regarding the start of construction. Since you both want basements, it would be enormously cost-saving for the other builder if you both at least have the basements built simultaneously (ideally by the same shell builder).

You have cheap prices in Bavaria

well, the conservatives still know how to handle money and don't throw it around as badly as the socialist robber barons!

*hust hust* Mr. Scheuer does not exactly cover himself in glory when it comes to taxpayers' money either

That's why we sent him to his own kind in Berlin, so to speak, into exile.