Fitting 3 rooms in a 40 sqm living room. Ideas

Thank you for your suggestions. We are planning with a 2x0.60 desk. The window front (i.e., on the left side of the plan, with the 2 windows) is the south side. While the right side, where the balcony is located, is oriented to the east. Of course, the office is not huge, but it is sufficient. As mentioned, we do not want to halve the room in the middle because of the loss of light. For that, we are content with a small office.

How suddenly east is opposite south ... well. Partially mirrored to kaho's suggestion, then you have light from the south in the living room and from the east (or rather north?) in the study. Light only comes from the east in the morning anyway, which is really not decisive for the use of the living room.

Sorry, you are of course right. The two window fronts face west. With the living room, it's not only about the light incidence but also about the fact that we want access to the balcony from the living room and not from the office.

However, I don't understand your suggestion right now.

I think you want too much at once. You will have to die one death. The room was simply designed to be separated.
For example, I wouldn't give a damn about the chimney shaft if it was only about the option to maybe use it someday. Wrong priority.
My suggestion also "sacrifices" the balcony, true. But you get better light in the living room than with kaho's suggestion, and no weird corners in the room (which wouldn't be my thing at all).

Clearly, one must face a certain inevitability, in our case that would be the size of the office. As far as the lighting conditions are concerned, I see it differently: We need it to be bright in the office, or rather, I find it important that the dining area is bright. On the other hand, I don't need as much light in the sofa area. That's where you usually sit in the evening.

Ok, if you don't want to divide vertically, then only horizontal remains. Since the office would probably still be too big for you then, that option is also out. You also don't want to work with room dividers. So there are only the options left to allocate a quarter of the room to the office, which would then be relatively small. You also have four options for this:

top left - takes the light from the west away from the living room
bottom left - takes the light from the west away from the living room, possibly blocks the chimney flue
top right - balcony no longer accessible from the living room
bottom right - only takes light from the east, would need to be checked because of the wide window front

Choose one.