Almost exactly one month of standstill since the last post. Not much has happened on the construction site. Today and/or tomorrow the four (too shallow) lift-and-slide doors will be removed and on Monday the new ones will be installed. Then finally work on interior and exterior plaster, drywall, and screed can continue.
From good news to bad news: additional costs. I knew we would have additional costs. I thought and planned for a mid-five-figure amount. But now that the subsequent trades have finally been backed by "real" offer prices instead of estimates, the amount was six figures. This was discussed and approved with the financier. Then at the beginning of the week came the SR for the shell construction. It was estimated that it would be about ten thousand EUR above the original offer. This has now become/is now 65. Of course, we also contributed to this (because of surface-mounted instead of flush-mounted fittings, a few more sockets, aluminum-clad windows...), but by no means six-figure additional costs (now starting with the digit two). Something like this really hits you hard.
At this point also as a warning to all future builders!
One mistake on my part was certainly that at the beginning I "controlled" based on the cost breakdown (- determination) according to DIN. Since this is organized by building components, it gradually became difficult to impossible. I then switched to a breakdown by trade. It was very unfortunate in retrospect to use estimated costs (even by an expert [architect]) instead of "real" offer prices here. The "upgrades" occurred because we always obtained alternatives when submitting the offer. For example, with the windows: a) white plastic b) anthracite plastic c) plastic with anthracite aluminum cladding. The price difference between a) and c) was, for example, not that high. However, it was therefore not clear whether offer a) was at the price level that was assumed in the cost determination. I am still amazed and hope that everything will turn out well. Hoping to be able to show pictures of the progress again soon.