Variants of basement construction (Pour concrete walls in the middle?)

Nope, no concrete numbers on hand. But it was definitely like that for us. And yes, the other costs are included, which by the way are reasonable in relation to the basement costs. From the approach, it is also understandable that precast elements are generally more expensive. Because of the more complex manufacturing process, transportation costs, and the additional profit margin of the precast plant. The reason why many construction companies prefer this is the time factor. It just goes faster. And time is a huge issue for many construction companies right now. I don’t want to rule out that some might just keep calculating until the cast-in-place basement becomes more expensive. Of course, there are also critics of precast elements for basements, especially e.g. with execution as [weiße Wanne]. But there are just as many who argue that with proper execution that is a nursery tale. But it’s pretty cool. The element walls are just baby soft.

Formwork is cost-effective because the team of craftsmen costs hardly anything and the formwork can be used multiple times.