Photos would be better here to see what the houses look like. You may build what looks the same as on the left and/or right. Clear? Oh, by the way: the problem will lie in the floor area ratio, if there is one. The first post is somewhat misleading. It is still sparsely built. With 0.2 and 400 sqm, that means you are only allowed to cover 80 sqm with the house. That results in about 60-65 sqm of living space. And with only one full floor, then max. 100 sqm of living space. Roughly estimated.