The pantry would then have to serve as the washing machine space. There is still a storage area under the stairs. Maybe you could shift a bit towards the left on the plan so that movement in the utility room is easier.
So I find your draft something completely different! I like it! Especially the entrance area and the arrangement of the stairs appeal to me a lot. Can't this somehow be combined with my draft? Just by the arrangement, something like that can certainly be optimized on the upper floor.
The external dimensions of 12.18 * 10.50 are correct. The small covered corner is only deducted from the measurements in this case. It's 1.50cm.
I would like to stick to my draft unless the lower area (hallway with stairs, utility room, and guest WC) can be arranged better. A small guest WC is enough for us.
Kaho, couldn't your "open staircase" somehow also be integrated into our plan?