House extension / extension of half the house in MOL / Brandenburg

I can draw in .dxf, I work as a billing clerk in a civil engineering company. So first of all, I will make my way to the construction consulting, I will print out the property map. The semi-detached houses are on one plot; according to the property map, it’s even just one house number... Similar buildings are everywhere there, but the townscape is mixed, Oderbruch after all. Thanks for the information for now, I will initiate further steps and then get back to you with news.