Construction costs in Berlin per m2 please

Construction costs in Berlin we want to build a house with a basement Basement 8 x 17 m ceiling height 3 meters Ground floor living room height 3.20 1st floor living room height 2.80 Gable roof with 50 cm side walls (knee walls) and glazed clay tiles The house should be built stone by stone or from Poroton What should we roughly calculate per m²

depends heavily on the area... even in Köpenick there are good and bad construction sites...

what does the district have to do with the craftsmen costs? the only difference is the purchase price of the land within a few kilometers.

One might think so... nevertheless, it is the case that in higher-priced areas, higher prices are charged for the same service by the same craftsmen...

Freely following the motto: ...they have the money...

thank you for the answers, but they are of little use to me a summary is preferable for me

The house should be built stone by stone or made of Poroton

Poroton.... sure?
I would rather go for PORenbeTON or PORoTON