Single-family house floor plan - narrower possible? First ideas

You have set a scale,

The scale is actually 1:25

Different staircase, smaller hallway, and it could work.
The staircase doesn’t have an effect. Door, jackets, and shoes under the staircase ruin everything. For that, you have a huge hallway with zero benefit

A straight staircase must be installed because I have to keep the load on the left knee as low as possible.
We have now initially placed the wardrobe to the left of the door; I have inserted a coat rod there.
The hallway may very well be smaller, but the walkway to the right towards the kitchen is currently only about 1 m wide as indicated – where else can you save space?

What if you place the staircase on the other side of the wall (in the dining room) and save yourself a passage?

We want to keep the noise outside the living area, so the staircase should be in the hallway. And we were hoping for a great effect when entering, so all of that sounded so promising.

However, the upper floor must also be considered

But I can only start that once the floor plan upstairs is set. By the way, it will be relatively uncomplicated.

Google "Gussek Haus myLine 140" - the floor plan has a bit of similarity to yours and is quite well done, I think.

I can only start once the floor plan is in place. By the way, this will be relatively straightforward.

Mmh... I'm curious to see if that's really the case...

Filling out a questionnaire would be helpful. And not everyone has the same amount of imagination; some are "lazy readers." In your position, I would upload a properly dimensioned plan (including site plan) = more chances for feedback.

You are building a relatively small house, especially if you also remove the meter. The wardrobe is enough for 2 people; for more, it already becomes tight. Where should, for example, the rain jacket, school bag, shoe cabinet go? The straight staircase takes up a lot of space. Try a staircase with a landing and a smaller hallway. The house is too delicate for the wow effect.

A ground floor without an upper floor is quite pointless and a floor plan thread without a completed questionnaire is just as pointless. In addition, a site plan and cardinal directions should be attached.

A ground floor without an upper floor is quite pointless

I have exactly the opposite opinion. As long as the position of the stairs is not fixed, I cannot design an upper floor.