If the dimensions didn’t indicate solid construction, I would deduce from the floor plan that it is a prefabricated house. Okal house from around 1980.
And where is the added value in this post now? Who cares!
If you can’t follow me linguistically there, I’ll say it more bluntly: the floor plan looks as screwed up as the one-meter-twenty-five beam grid typical for prefab houses back then was planned. Imagination level zero to the third power. Didn’t fit here, didn’t fit there, the machine step dictated it.
Guest room = office ... and room for jackets and so on...
Twelve square meters for jacket storage instead of a wardrobe. No comment.
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So, now a bit constructive as well, I’ll try a quick shabby improvement:
Although I actually don’t find the utility room upstairs a bad idea, spatially I found it botched.
Therefore I integrated it in the utility room on the ground floor, pushed the toilet to the other side and moved the pantry slightly “up,” then turned the living room door at the stop.
Upstairs then the bathroom was enlarged (de-miniaturized) and the wall lines adjusted to the roof shape. You have to put yourself into the quick sketch still: shift the door to child 1 slightly, the doors to child 2 and parents into the hallway tip.
Also not a Picasso or even a dream house, just a minimally invasive suggestion to fix the mess.