Construction of a multi-family house or 2 semi-detached houses according to KfW40+

We lack housing for 1-2 people, possibly with a baby, until construction is completed. The small apartments are good for that.

Hello, good idea... but we have considered that too :p. The apartments can be connected by a spiral staircase to be installed afterwards. In appropriate places, for example, the underfloor heating is omitted...