Children's room in the attic planned too small?

How do you recognize the slope in the comic drawing?

I will respond properly later also with other floor plan ideas and gladly with a photo of the staircase from 1948 which unfortunately has to stay like this ;)

So far that sounds more mean than really helpful xD the roof has an angle of 50c and is therefore very steep.

The ES also only has a flat area of 12sqm... half of that would be even smaller than your nicely named cubicle.
ES will also only be created later - it will be an extension on the existing extension of the ground floor. So maybe not implemented directly and if so, the load-bearing exterior walls cannot be moved... (for example to place them differently in the room...)
There is also a part coming from the slope that adds more sense of space. We don’t know yet if we want to set a knee wall or let the large floor-to-ceiling windows run all the way down.

We have planned more variants for ourselves and are currently testing several options. But with 4 children you can’t give everyone a 15sqm room... 60sqm just for children's rooms alone... what am I supposed to do later with 60sqm standing empty?

We want 5 bedrooms, so 4 have to be upstairs.

Regarding the weird hallways: unfortunately the staircase is where it is... how else should I get from front to back? I think walk-through rooms are worse.
And the boxed-in area in the middle between pink and gray should at least be enough for a toilet.

I would rather give my children their own rooms with dormers or a large beautiful skylight than having to share a big one.

Unfortunately the house is long and narrow... (7.3x15m) but we fell in love with the plot and now want to remodel it ideally for our needs and were actually hoping for inspiration.

All the little rooms are called Zone, so naming individual rooms is difficult. I suspect the tiny little room in the middle (opposite the stairs) is a toilet? Can it also be placed at the very bottom right, and instead make the two rooms on the right half of the drawing a bit larger? Can you fit additional built-in cupboards or similar in the wide hallway? That way, the children would have more space in their rooms.

Hello dreamcatcher,

yes, that is supposed to be a toilet.
I'll show you another floor plan variant – there I planned roughly as you wrote.
In the hallway area, built-in closets are planned in the slants to create more space in the rooms. In other words, basically just a bed and later a desk.

The current ES would also initially be used upstairs as a play and common room, and not selfishly as an unnecessary bedroom for us :P

I personally prefer your last proposal, as it has a more spacious layout and the toilet is in its optimal place (provided it is technically feasible). Do you prefer the first proposal? If so, why?