Only as a reference/comparison, in Italy the mimimum apartment allowed (intended for 1 person) is 28 sqm, to which you add 10 sqm for each adult more, children

Only as a reference/comparison, in Italy the mimimum apartment allowed (intended for 1 person) is 28 sqm, to which you add 10 sqm for each adult more, children below 14 (if I remember correctly) do not count. The typical 28 sqm apartment (they are called here "popular houses" and are usually built by some public entity and rented out to people in need at lowish rates) is actually fine (in a minimalistic view) for a single, as it usually includes an entrance/dining room/kitchen, a bedroom and a bathroom, but the 38 sqm and larger houses for 3 or more people do actually look like "shoeboxes".