Flats in blocks, where the entrance door matters as much as yours
51.6 % of the main homes in Sant Boi de Llobregat are under 60 m² — the median is 21.3 %, at 3,974 people per km². This is vertical living, and it pushes the work towards the communal: street doors that stop latching, forced letterboxes, storage rooms and garage doors. In a block there are two things worth checking before anyone sets off — whether a neighbour or the administrator holds a spare, and whether the door is one of those that locks itself behind you when you step out with the bins. That last one is the single most repeated callout there is.