So we want to build the same size with a concrete basement in BW. The offers range between 400 without BN and 500 with BN. But then completely tiled and painted. However, without gimmicks like controlled residential ventilation or KNX. But electric shutters everywhere. Without outdoor facilities and garage. But then one should probably manage with 80k for both??? Prefabricated garage costs around 20k, the rest for outdoors.