This, and many other original town houses, were one room wide by two rooms deep. On the ground floor, behind the second room was a walled patio, open to the elements, surrounded by other properties on three sides (four sides including my property). This is where animals could be kept, and quite often the staircase to the next floor.
This house is old, and all floors are wooden beams (mobila or movila) with small arched ceilings between beams. Tin baths were used on the ground floor where water could be heated over the fire. As a result, there was never a possible weight problem.
Fifty or sixty years ago, many small and medium size town houses converted the back patio into liveable two storey extensions using steel reinforced building methods. This allowed owners to put in fitted bathrooms (luxury). Luckily my terrace is at the top of this newer structure with no balcony overhangs. Some of the more wealthy residents have Jacuzzies on their roof terraces. I'm quite happy with tobacco plants.