Although the urban fabric of Buenos Aires is characterized by a heterogeneous and constantly changing morphological condition, within the range of low-density housing, it is possible to detect certain recurring typologies that emerged from the interplay of successive historical variables—such as block subdivision strategies, urban regulations and their subsequent updates, or the building traditions of those who built the city. One of these identifiable typologies is the PH, whose name derives from *Propiedad Horizontal* (Horizontal Property), a regulation that allowed the development of individual homes within a single plot.
Historically, the PH emerged from the "casa chorizo" (sausage house), which itself originated from splitting typical courtyard houses in half. This housing type was developed as a residential solution adapted to the proportions of the city's plots, resulting from the subdivision of city blocks into extremely narrow and deep lots.
