I don’t quite understand the layout either: Where would the 180 cm knee wall be? Please show the plot plan. Why are living rooms, just like the common rooms, in the north, and bedrooms like the utility room and toilet in the south? A bathroom is also not ideally placed directly above the living room – it would be better to have toilets stacked and the water supply above the utility room (of course, you can deviate from these rules, but if you don’t have to, you should plan well and efficiently from the start). I would also avoid windows that cannot be opened on the upper floor, after all, they need to be cleaned sometimes. The same applies to furnishing: under the window, so you can’t reach it, is not ideal either. The staircase should be at least 370 cm long with a normal ceiling height (2.50 m). Extending it isn’t possible where it currently is. It is also in a rather bad position in the house, hidden and not centrally accessible. You practically have to walk around the table. The chimney shaft conflicts with the toilet’s downpipe. If you want to look from the entrance into the garden, why isn’t it drawn that way? The storage room is quite narrow… too narrow for, for example, a washing machine and dryer. The walk-in closet is almost useless with so little wardrobe space. What I really don’t understand: why are you designing a two-story house with similar space on the ground floor as on the upper floor? We are only two people as well and have about 90 m² on the ground floor and only 45 m² upstairs; that is quite doable with your plot size, even with a shed roof if that is desired. Why are you trying to squeeze everything into a small square?