Serdia (2026 Update)

1. Overview & Historical Context SERDIA (an acronym for Sociedade de Edifícios e Residências para a Idade Avançada, S.A. ) was a unique Portuguese semi-public corporation founded in 1947 during the late Estado Novo regime (1933–1974). While its official mission focused on building residences for the elderly, its real historical significance lies in its role as a large-scale developer of affordable, modern housing estates ( bairros ) that reshaped the peripheries of Lisbon and Porto.