Floor plan of a single-family house with 3 children's rooms and a double garage

Have you already filled out the questionnaire?

https://www.hausbau-forum.de/threads/grundriss-planung-unbedingt-vor-beitrag-erstellung-lesen.11714/

For brainstorming with DG expansion ... there is not enough standing height there ... even a staircase position would have to be newly created.

Yes, of course, that would naturally not work with this roof shape. We generally tend to prefer a gable roof anyway. A shed roof is somehow a thing of the planner...

For mental exercises with DG expansion ... there is not even enough standing height there ...

I would also rather give the younger ones open roof undersides, it might be enough for treehouse sleeping places.

Yes, of course, that would not work with this roof shape. Generally tend to prefer a gable roof anyway. A shed roof is somehow a thing of the planner...

Then the planner should build his own house.

... I did read that very well ... and tried to argue against it. Because the bicycle movement in the garage is often underestimated and I do not understand the absolute advantage of the side entrance from the garage ;) ;) ;)

That was unfortunately an unfortunate start to the thread. Without the completed questionnaire, it will hardly be a meaningful discussion, but rather a constant question-and-answer game. What does the development plan say? What is the budget? Is it enough for the attic conversion with a pitched roof? Is a different staircase okay?
https://www.hausbau-forum.de/threads/grundriss-planung-unbedingt-vor-beitrag-erstellung-lesen.11714/

Maybe you should start again?

... I did read that very well ... and tried to argue against it. Because the bicycle movement in the garage is often underestimated and I do not understand the unconditional advantage of the side entrance from the garage ;) ;) ;)

I do, I have such an entrance that I would not want to miss.