Start building the house in October?

I rather find the opposite... Summer means high humidity and poor screed drying.

I expressed myself incorrectly - by advantageous I meant the move-in. If construction starts in November and the shell is completed by mid-December, I wouldn't expect screed in the summer now, rather March or April, right?

Hm, we started construction in mid-March and had the screed in from mid-July. It could theoretically have gone faster if we had done less ourselves. Because of the personal contributions, we were glad about spring and summer: much longer daylight, no cold drafts while chasing slots for hours, luck with the weather (very dry) and therefore little mud brought into the house, no half-frozen hands when cleaning something at the outdoor construction water tap, exterior plaster no problem (requires 5 degrees), therefore relatively quick dismantling of the scaffolding...

It’s certainly possible with construction start in winter too, and no one can order sunshine or rain, but we are glad about spring. :-)

I wouldn’t worry too much about winter in Aschaffenburg; if it does snow, it usually happens only at the end of January or February. In spring, it normally rains much more than in November or December.

Best regards
Sabine