Single-family house of 200m² in 45° angled construction

Neverever - not with the roof and basement. Not even the bare construction without basement and earthworks.

I don't quite understand why several people think the costs can't be right. We have obtained quotes from several construction companies. Price range 525,000 - 565,000

Something is missing

https://www.hausbau-forum.de/threads/liste-der-anfallenden-Baunebenkosten-bauseits-teurer.9737/

https://www.hausbau-forum.de/threads/warum-ein-Hausbau-fast-immer-teurer-kommt-als-kalkuliert.16237/



Think about it carefully. In the end, it is a blower. What the heat recovery does not manage is reheated with electricity. Photovoltaics are only used to a limited extent. The less sun there is, the more you have to heat.
If you don’t want underfloor heating then look for the Tecalor 2.5 or Stiebel LWZ 604 Air. I don’t know if there are others with such a system.

Something is missing

https://www.hausbau-forum.de/threads/liste-der-anfallenden-Baunebenkosten-bauseits-teurer.9737/

https://www.hausbau-forum.de/threads/warum-ein-Hausbau-fast-immer-teurer-kommt-als-kalkuliert.16237/

Think carefully about it. In the end, it’s a blower. What the heat recovery doesn’t achieve is heated additionally with electricity. Photovoltaics are only partially useful. The less sun, the more you have to heat.
If you don’t want underfloor heating, then look for the Tecalor 2.5 or Stiebel LWZ 604 Air. Don’t know if there are others with such a system.