Draft single-family house with 3 children's rooms, basement, and boundary construction

The staircase you drew is unfortunately not in the same location on the upper floor as it is on the ground floor.
The problem is: If I move the staircase further towards the top of the plan to give the children's rooms more width, the living room gets smaller.
Currently, I have a width of 3m in the two children's rooms and 4m in the living room. Both still acceptable, or what do you think?

Additionally, you have deprived me of my exit to the previously unmentioned "morning coffee spot."
So on the bottom right next to the WC, it was intended to be able to enjoy the morning sun.

Is the staircase planned on the left or right?

The staircase itself should be somewhat wider: 1 meter for the staircase itself plus 20 cm for the wall (structurally load-bearing is probably unavoidable, i.e. at least 17.5 plus plaster on both sides). But then the passage becomes quite narrow – better reduce the WC and the corner by about 20 cm downwards.

I would give the bedroom/dressing area an extra exit and the dressing room itself a sliding door so that after dressing you come directly into the hallway without waking the sleeping person with light and noise.

I actually find the plan quite ideal. I would just "reverse" the direction of the staircase at the top. This way, you have more traffic space at the "exit" and immediately reach 3 out of 4 doors. This way, you reach one quickly, but have to walk around for the other rooms.

Best regards

I also like the floor plan itself... but the staircase takes up too much space for me. A half-turn staircase would be much better. That way, for example, the children's rooms could be slightly enlarged.

However, for children a staircase with consistently rectangular steps is much better and easier to manage at an earlier age... Especially if there is going to be a third child, it's good if the older ones can use the stairs by themselves. (Three on a staircase where the steps are narrower on one side is much more difficult)

I think my children would love to come into the living room from both sides and probably run around in circles all the time The hallway is where they like to play the most anyway. Not in the children's room. Especially not alone in the children's room. So an extra square meter there is not necessary.

The only possibility that occurs to me to make the children's rooms bigger is to box in the staircase. Unfortunately, this means that the natural light in the hallway will be lost:

or you make a frosted glass pane here