Area doors and stairs within a room.
I unfortunately have to ask again individually because the previous answer apparently arose due to a misinterpretation of the question. I am asking clearly and please read the questions EXACTLY:
1) Is the floor area within a DOOR FRAME counted as living space or are these so-called "door niches" not included? As far as known, according to current case law, these areas are NOT counted as living space.
2) What about open passageways within the apartment? For example, a wall opening or a passage where a door used to be but has been removed along with the frame: Is the floor area between the side walls considered living space or is this area to be deducted as with a door niche?
3) Endless point of contention: When does a staircase within the apartment count as a staircase? It is stated on the internet that anything from 3 steps (e.g. to go from the lower to the higher level of a room) is NOT counted as living space. This is NOT about stairs and the area BELOW it but only about a height adjustment within a room. When are 3 steps 3 steps? In our case: Floor, Step 1, Step 2, and Step 3 - where Step 3 is clearly recognizable as a step, but then transitions directly back into the floor of the higher level with a small ledge (end cap). Are these now 3 steps by legal definition or only 3 steps by purely "visual" standards?
I would like to ask you to ask for clarification if there are any uncertainties, as these points are extremely important.
Thank you in advance...