We also built in Bavaria (moved in 4 weeks ago). 176m² living space with a basement and two full floors. Solid construction (KS + ETICS). The price at the bottom right is around €340,000 turnkey + expenses for subsequent upgrades (wood stove, better tiles, aluminum roller shutters, etc.). In addition, there are the usual incidental building costs (electricity connection, telephone, sewer, etc.). So you could come out under €400,000 for the house. But prices vary quite a bit regionally. However, you will only know for sure if you get quotes yourself.