Optimize functional ground floor layout within limited space

If you want to run up and down 19.5% incline with 25 cm tread dozens of times every day – you probably won’t die from it. This staircase still complies with DIN standards but is already slowly dangerous, especially going down.

That's how it is. Going up only builds strong footballer calves, but going down deserves a medal in the national competition for barrier-free construction. At the slightest joint ache, you'd rather die than change floors, or lease from the neighbor the one-meter-thirty-nine strip for an external elevator ;-) Two steps to each landing, and the problem is solved.

So, now again about the stairs. I think the architect has not yet fully updated the stairs according to the current status or has not updated the labeling. The ceiling was once at 25cm. Because if I calculate: 290/15=19.33 and when the ceiling was still 25cm: 293/15=19.53. And if I now count the steps on the plan, I get 16 steps. Possible room height on the 1st floor from 250: 288/16=18.0. Possible room height on the ground floor from 240: 278/16=17.4. As I said, I need to address the stairs again with the architect. And what do you think would be the right height at the house entrance? Is a 16cm step necessary for the rare weather events? Or are 5cm enough? Or would that become a tripping hazard? Both entrances (front and back) are not facing the weather side. And as I said, the living room or similar is not on the ground floor, in case a 100-year weather event does occur... Regarding the original question and the layout of the ground floor, are there no more good comments?

To calculate the staircase, you better not rely on the sketches shown. Apparently, they are outdated or not very reliable anyway. Take the room dimensions it occupies and calculate with the space you give it. I always work with a rise of 18.5 and a tread of no less than 26 for sketches - just as a comparison. Those with large feet tend to build a 27 tread.

And, one should note that if the floors have different heights, then with a constant stairwell size the rise height changes per floor.

The middle floor could be critical, as the doors are already very close to the stairwell and not very wide.

5cm steps are actually tripping hazards. It's better not to build those. I think for such low thresholds one would rather build a ramp. By the way, I think it's okay if each floor is only 2.40cm high. Especially in building areas where you are building on the old buildings on the left and right, certain regulations are simply part of living together.

Minimum height of living spaces is 2.4m. I do not understand why one plans only 2.3m in the [WZ].