Low ridge height results in a low knee wall

Now I have a plot offer that would fit quite well. But the development plan states that the ridge height may only be 7.20 m. 2 apartments are permitted, which I would like to have. Building window 17*14. Since I would like to have 2.75 m on the ground floor, as well as underfloor heating, because of this height limitation you can only build one story, and on the 2nd floor there would actually be no comfortable living space possible? Knee wall then starts at 1 m or so... you can forget about that. Permitted are gable roof and hipped roof, angles between 30 and 45°. Is there a program / an online resource where you can roughly calculate this? Thanks.

What do you want to calculate online? Pencil, graph paper, and a ruler are enough for that. Maybe also a formula collection and a calculator....

Is there a program / an online resource where you can roughly calculate this?

With a house depth of 14 m and a symmetrical gable roof of 30° pitch, the height of the roof is 4.04 m; that makes 41 cm minus the thickness of the ceiling as the "knee wall," so more or less none.

With a house depth of 14 m and a symmetrical gable roof of 30° pitch, the height of the roof is 4.04 m; that makes 41 cm minus the thickness of the ceiling as "knee wall," so more or less none.

Thank you very much, that is the information I expected/feared. The development plan is very old; back then, the city administrations probably had no idea in which direction house design would develop. Since I place great value on high ceilings (atmosphere), underfloor heating, and want KFW 55 standard, it would probably have to go outward (complete utilization of the building window), and in the knee wall storey it is tight and therefore ugly. Someone said: more than a "settlement house" is not possible there.

I will now have a rough first architectural floor plan made; if that doesn't work, the plot is not suitable.

Someone said: more than a "settlement house" is not possible there.

17x14 results in a tiny 238 sqm footprint, thus approx. 200 sqm living space + storage space in the attic.

17x14 results in a tiny 238 sqm floor area,

Someone said: more than a "settlement house" isn't possible there. I will now have a rough first architectural floor plan made; if that doesn't work, the plot is no good.

This "settlement house" would already be the model "Economic Miracle XXL" for Ludwig Erhard personally and I wouldn't even have a floor plan drawn up for this clarification: a wire edge model is enough to calculate the possible areas and their heights.