Installation shaft and chimney shaft in one?

The length of the staircase is 3.60 meters, with 15 steps. Too short? The measurement here is taken from the forum:

If you read my first entry, the resulting detailed question arises from the fact that we are considering planning the bathroom above the living room so that we do not have to do without the home office room and the children's rooms can be located in the west at the same time.

If that is not the case, then we will think about another plan in time.

But if it does work and we get positive feedback here, why not use the forum?

The whole planning is a process, and fundamental questions (does the bathroom go over the living area or the chimney shaft) also belong on the way to the final floor plan,

I simply didn’t want to impose a "final" (from our point of view) floor plan here on the community yet (before going to the architect). That’s why, among other things, I wanted to "feel my way" through this thread here. But since we’re at it, here is the ground floor:

Do you really only want a floor height of 2.8m? If you calculate 2.6m room height + 20cm ceiling + 20cm insulation-screed-layer, you are already at 3m floor height. A greater floor height naturally always requires a longer staircase, even if you keep the angle the same. The angle for the short staircase is already at the upper limit. That would be too steep for me, hence the comment about the chicken ladder. A shallower staircase naturally requires more length again.

@11ant : May I ask where your experience comes from?

But why ask a detailed question when the basic concept isn't right? You yourself write that this is a process. But then you start with the fundamentals – only later do you get to the details. You are planning with a bad draft, just look at the bathrooms. Leaving aside that ideally water pipes are avoided over living areas (it's just bad planning if it is like that), but the other bathroom is practically unusable with your wall in the middle of the narrow room. The same applies to a chimney placed at the eaves. Then you come with a gable roof and have a headache-inducing staircase. Your staircase... the small "emergency staircase" for small houses... it's nice that you ask about the detail, which in your eyes is the only reason to change something. But there are already so many fundamental problems. On the ground floor: guest room: almost not furnishable. Somewhere there was also a bathroom visible from the bedroom in the east: at 2 meters, unusable. If something like that already doesn't work, then you don't need to discuss a fireplace or an insta-shaft?! Because you keep going even though a lot of misplanning has already been recognized. Later. A process doesn't start at the end. Nothing here is final yet. Ugly things will also not be final. Final is just before the building application, and that usually means multiple revisions by the architect. Playing around is all well and good – either you just play the beginner version and then let the professional handle it, you can do the game well, or you play alongside the professional. You can also let crowd wisdom plan if the professional is a show-off. A floor plan discussion here in the forum takes 6 hours. After that, only repetition or small talk happens. The air is then out. Here now the only interesting thing is whether you plan 650,000 just for the house.

Four decades of experience with construction planning, especially residential construction across the board.