Building class 1 - How high is the total allowed to be? Thank you

Do mobile users perhaps not see this? - the OP wrote in the question box: "Question / Concern: For building class one, how high is the house allowed to be, does it depend on different roofs? Please provide experienced detailed help on how what when where exactly"

Attention: the crucial hint is probably: "Building location: OE" (which probably does not mean Olpe, but Austria).

I understand this (without a manual and even without A-levels, just by simply reading) as that he wants to know,
a) up to which building height a house falls into building class 1 (probably defined differently than building class 1 in Germany); and
b) whether a flat or pitched roof is significant for this. In other words: whether building height / eaves height / ridge height / (average) wall height
(possibly in competition with each other) are relevant dimensions.

Do mobile users possibly not see this? – the OP wrote in the question box: "Question / concern: For building class one, how high is the house allowed to be, does it depend on different roof types? Please provide experienced detailed help on how, what, when, where exactly"

Note: the crucial hint is probably: "Building location: OE" (which probably does not mean Olpe, but Austria).

I understand this (without an instruction manual and even without a high school diploma, just by reading) as him wanting to know,
a) up to what building height a house falls into building class 1 (probably defined differently than building class 1 in Germany); and
b) whether a flat or pitched roof is significantly relevant for this. In other words: whether building height / eaves height / ridge height / (average) wall height
(potentially in competition with each other) are relevant dimensions.