A sensitive interpretation of the genius loci: this is how one could describe the social housing developent that the studio Oliver, Reina, Martín, Moyà & Garcías has executed in Son Gotleu, one of the poorest, most vulnnerable among the neighborhoods of the city of Palma de Mallorca, in the Balearic Islands. The design for five dwellings is centered, above all, on the capacity of traditional construction systems – in this specific case, walls of local Marés stone – to address current sustainability and energy-efficiency requirements with a high degree of decorum.