Delete the answer from 11ant.
It is wrong. Forget it!
It is not wrong, these are just two different things:
Living space)
the calculation is uniform nationwide. Under 1m
room height not at all, between 1m and 2m half, only from 2m full.
Full floor definition)
this calculation differs depending on the state building code. Where the states, as far as I know, agree is 2.3 m
floor height regarding which area in the attic counts at all, and 1.4 m average projection from the ground regarding whether a basement counts. Differences exist in the relation of this attic room area in the 2.3 m or higher range to the area of the floor below. One state building code can say two thirds and another three quarters.
And – without having read all sixteen state building codes – I think in some it may also play a role to only partially count the low areas – otherwise, why else have we here already discussed several times how much knee wall and/or dormer opens the full floor trap?
Regarding Schleswig-Holstein, the quote here in post #1 says that the local state building code
does not consider this aspect.
