Single-family house with a small footprint, attic and basement, neighbor's approval

The dashed lines are not walls but only delimit the hallway-dining-living areas; that is how I calculated the areas. The spaces are intended to be completely open.

I am currently missing the correct term, but the gabled roof is placed on the house in such a way that headroom is not an issue anywhere. So, ridge-highest point-ridge runs from north to south and not from west to east. This also creates an attic studio above the upper floor.

...so a cut-out terraced house?

So I also didn’t mean the dashed lines. That was already clear to me. No, I think the other interior walls are too thin. What is planned there? So our interior walls are 17.5 cm if they are not load-bearing. Otherwise, I think 24. (Oh god, I’ve forgotten everything again.)

So I didn't mean the dashed lines either. That was already clear to me. No, I think the other interior walls are too thin. What is planned there? So our interior walls are 17.5cm if they are not load-bearing. Otherwise, I think 24cm. (Oh god, I forgot everything again.)

You can tell you haven't been here for a long time :D

17.5cm is sufficient. For non-load-bearing interior walls, 11.5cm also works.

I just checked again. In some cases (e.g. with large spans) 24s may also be necessary for load-bearing walls.

Also die gestrichelten Linien meinte ich auch nicht.

Ok, then I’m not quite sure what you meant by 45° walls. Then I probably drew everything as non-load-bearing, which surely can’t stay that way. :)

...so a cut-out terraced house?

Yes, that’s one way to put it. :)