Floor plan design single-family house with around 150 m²

hard to clean, does not really brighten, not to be opened

I don’t know what you mean, even our zigzag wall in the living room, which is load-bearing, didn’t cause any additional effort or extra costs during construction.. I don’t think it’s so difficult nowadays to create a corner in a wall...

That’s all well and good for you if your general contractor didn’t price the corners differently. Load-bearing walls are regularly also "panel boundaries" of floor slab fields. Making the load-bearing wall zigzagged then also affects this panel boundary. My remark referred to the fact that such spicey details can be implemented more lightly for statically subordinate or insignificant walls (only bracing or even neither load-bearing nor bracing of relevance). Regardless of the construction (masonry or drywall), of course every additional corner also involves extra effort, but budgeting somewhere around three to five percent of the construction budget (including corner lintels, girders & co. to be understood) for off-the-shelf details is okay in my opinion. Even I wouldn’t build a plain cookie-cutter housing estate house.

But this is exactly a matter of experience that I would have liked to know from the experience of others. I would now recommend everyone planning a floor plan to think about a large floor-to-ceiling window, preferably >= 3m, behind the sofa.

The space to set back is also needed. That really costs money and square meters

Experiences of others are only useful if you follow them ;-) I read the at least 3m as the window width, not as the sofa setback distance.

Certainly haydee also reads like this, nevertheless moving the sofa away from the floor-to-ceiling window, to which you then actually sit with your back, takes up space if both the sofa and the window are to be staged. Therefore, I find it much more effective to think about sofa positions in such a way that their orientation directly allows a view of the window and a floor-to-ceiling window in not so huge rooms can also remain free and have an effect ;)

Therefore, I find it much more effective to think about sofa positions in such a way that their orientation directly allows a view to the window and a floor-to-ceiling window in not-so-huge rooms can also remain free and have an effect

Let us not forget two things specifically here: secondly, this was initially only about the current house, later the conservatory is to be added behind this sofa/window; and first of all, the discussion at that time was further complicated by having to master a magical triangle: namely a. turning the dining table when more guests come, b. still having passage width for the terrace door with the dining table turned, c. while also doing justice to a music cabinet from Mrs. Berta Panislowski from Massachusetts. Doing so d. without having to perform too much acrobatics over the backrest of the sofa to water the little flowers on the windowsill behind the sofa, then led to a standard sill height for this window (if my memory still works perfectly, as I hope).

exactly meant like that

chrisw81 meant it generally in my opinion

hard to clean, doesn't really brighten, cannot be opened

Strange that you really see it often. Even in the trendy Instagram houses...