What to do? Go to the architect (if yes, for which service phases?) or is it worth ringing the doorbell for something like this with the flat roof or the new build to exchange ideas and possibly inquire about their experience with the city? Or do you call the city for something like this and ask for their opinion in advance (they have been very friendly and quick so far, but also emphasize that it depends on the entire house and not just one value like the knee wall).
The architect can also prepare an initial conceptual study for you based on the existing room concept – your task – which he then coordinates with the building authorities regarding principal feasibility.
We have already had contact there. Everything nice and friendly, but evasive when it comes to questions about the knee wall, as they want to see basically the entire plan first – but the plan depends on that for us in the first place.
Going to the architect is of course clear. Ringing the neighbor is also good. For the talk with the building department, a building preliminary inquiry is sufficient, and for that more or less a set square (i.e., not even necessarily a complete preliminary draft). : is Overath from Bad MüEi still within range?
The neighboring development plan may not be legally applicable here but, the younger it is, the better it serves as an indicator of the municipality’s planning intentions and which exemptions are promising (and for their argumentation). Don’t forget: involve a colleague, not just because of the subject area.
Local architect would then mean service phases 1 & 2?
The recommended scope of services would be (see house construction roadmap, well known path) classically service phases 1 to 8, module A is merely a sensible tranche (and as is known the one before the dough resting).
Additionally, we would like a knee wall of 140+ cm (or at least 120 cm) and the room layout for the 1st floor depends precisely on this issue. The construction company initially set 80 cm (actually only 60 cm if the room height downstairs is 270 cm) since those seem unproblematic. But here I would be willing to fight for every centimeter.
Well then everything is clear. 250 are more than enough, so you can redistribute 20 cm upwards right away.