ᐅ A full story must have at least two-thirds of its floor area with a minimum ceiling height of 2.30 meters (approximately 7 feet 7 inches).

Full storeys are floors where the top edge of the structural ceiling is, on average, more than 1.40 m (5.5 feet) above street level or more than 2 m (6.6 feet) above ground level (above-ground floors) and have a minimum height of 2.30 m (7.5 feet). The top two floors are only considered full storeys if they maintain this height over more than two-thirds of the floor area below. The height of the floors is measured from the top edge of the structural ceiling to the top edge of the structural ceiling of the floor above, or, in floors with sloped roofs, to the underside of the roof structure.

This is specified in the regional building code.

If the attic floor above the entire full storey has a maximum height of 2.29 m (7.5 feet) or if two-thirds are 2.30 m (7.5 feet) or higher and the remaining one-third gradually rises from, for example, 1.90 m (6.2 feet) up to 2.29 m (7.5 feet) due to the roof slope, would this be allowed?

I have tried to illustrate this visually to help with understanding.

Thank you in advance.

Seropaa schrieb:

That is stated in the regional building code.

Bremen?

ypg schrieb:

Bremen?

Yes.

Seropaa schrieb:

If the attic above the entire full floor is a maximum height of 2.29 m (7.5 feet), or if two-thirds of it are 2.30 m (7.5 feet) or higher and the remaining third starts, for example, at 1.90 m (6.2 feet) and rises to 2.29 m (7.5 feet) along the roof, would that be allowed?

You could build it, but the house would be practically uninhabitable because of Paragraph 47 of the state building code.

ypg schrieb:

You can build it, but the house would practically be uninhabitable because Paragraph 47 of the regional building code also applies.

That's correct. The continuous 2.29m (7 feet 6 inches) height no longer applies. However, the second solution should be feasible as long as half of the room is within the two-thirds area where the minimum height is 2.30m (7 feet 7 inches) and it rises up to the roof ridge.

... if you then also increase the ceiling height on the ground floor 😉 Yes, then the town villa is justified. This is often done when a ground floor bay window is not possible, which would usually be the better solution.