How to achieve Bremer 2/3 solution with high knee wall?

I am speechless about which architects you have talked to. I would quickly find someone else. These are basics and the simplest fundamentals that every architect must know and be able to do. The 2/3 rule for a floor applies in over 90% of single-family house new development areas, and even without much calculation, every builder must know that a knee wall of approx. 115cm in the shell construction and 100cm after insulation and flooring is always possible everywhere, thus achieving a full floor. Quickly find another builder.

However, the 1.15m knee wall in the shell construction is only possible with a roof pitch of 38°, right? Since a minimum of 40° is required and the provider only offers 42° as the next higher roof pitch, 1.15m knee wall would be too high here; from 1m knee wall in the shell construction would be the right range. The mentioned 70cm knee wall would still be too low but probably referred to the knee wall minus floor structure and would thus not be so far from the truth. That was not an architect but just a representative. We just wanted to understand it ourselves so that we are well prepared for the architect meeting and can discuss possible measures beforehand.

Fortunately, we are not yet committed to a provider; we are still comparing.

That was not an architect either, just a representative. We just wanted to understand it ourselves so that we are well prepared for the architect meeting and can already discuss any measures in advance.
Fortunately, we are not yet committed to a provider, we are still comparing.

Do not seek a conversation with an architect from a provider, even if you want to build with a general contractor / "house manufacturer." You should always hire an architect yourself.

with 69m² floor area + upper floor.

Attic. You are in the single-story area, so the roof will be expanded.

We have already heard so many interpretations of this legal text,

Precisely the full story floor requires no interpretations at all. You just have to read carefully. But well, that is now settled with the floor area of the house.

Since at least 40° is required and the provider only offers 42° as the next higher roof pitch, 1.15m knee wall would be too high here, from 1m knee wall raw construction you would be in the right area.

The general contractor will also build under 42 degrees, but you must have at least 40 degrees. With this, the municipality wants to keep out town villas. With 9 meters you are actually in a comfortable situation. You can draw your limit well yourself on millimeter paper and with a set square. After all, height depends on the width of the house. The wider, the higher. There are two of you, and ultimately for the planning, the space program from you as well as the plot should suffice. How many rooms for what and how arranged… what does the plot do with it? Exactly that is the individual part of a plan. Without kids, you have more options because you no longer have to provide 2 children's rooms, nevertheless consider that the attic depends on the ground floor. Possibly consider a shed roof, if allowed.

Fortunately, we are not yet committed to a provider, we are still comparing.

If you are still looking for one, I can highly recommend ours! We also built in HB :)

If you’re still looking for one, I can highly recommend ours! We also built in HB :)

We are always happy to receive recommendations, of course :)

We are always happy about recommendations :)

we built with ernst and ernst from Achim, do you already know them?