ᐅ Is a stepped upper floor permitted if the development plan requires a flat roof?

Hello everyone,

I have a question about interpreting a development plan. If the plan states "II FD," meaning two full stories with a flat roof, is a setback floor, which is obviously not a full story, allowed?

The setback floor would, of course, also have a flat roof. Up to what pitch angle is a roof still considered a flat roof?

Thank you.

Best regards,
Hausbauer1

If a flat roof is explicitly required and, for example, the site coverage ratio is 0.2 and the floor area ratio is 0.5, this already suggests that option.

The distinction between flat roof and shed roof in degrees can possibly be found in the textual regulations; I would not expect anything above ten degrees.

Conversely, this means the roof cannot have a steeper slope. This makes the eave height a particularly critical dimension.

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Shouldn't it be interpreted like this: if someone builds 2 full floors, they must choose a flat roof to keep the building height down. But if they are satisfied with 1 or 1.5 floors, a pitched roof is also allowed. I find it hard to believe that a development plan would strictly require a flat roof, which is actually the most problematic roof type. Karsten

Nordlys schrieb:
Shouldn't it be interpreted like this: anyone building two full floors must then choose a flat roof. [...] I honestly can't imagine that a development plan would strictly require a flat roof, which is the most problematic roof type.

a) then it should say II FD/SD
b) didn't you yourself mention a development plan area with themed districts, where flat roofs would belong to the "Bauhaus" (Hornbach style)?

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Only flat roofs are allowed here because the neighborhood is meant to have a Bauhaus-style appearance. Additional design guidelines support this.
What could be problematic about flat roofs? Take a look at inverted roofs. Nowadays, the waterproofing is no longer directly exposed to the weather, and the top layer can be made just as watertight as in basement construction (waterproof concrete).

Here is the same, but with a flat roof and at least two full floors allowed. I don’t see what could be problematic about a flat roof. Our developer builds both pitched and flat roofs and considers the latter to be less problematic.