General question - what do you want to build?
Bungalow
1.5 stories
2 full stories
I am also asking with regard to your first drawing. 15 x 11 sqm minus the corner alone results in a living area of approx. 150 - 160 sqm on one floor. This would mean, for example, a living area of 300 sqm + with 2 full stories.
Is this what you have planned or is the floor area somewhat smaller?