General Brazilian
residencial de baixa renda / habitação acessível
Most common usage in real estate and urban development contexts
Rio de Janeiro
residencial popular / habitação de interesse social
Often used in reference to favela upgrade programs and social housing
São Paulo
imóvel de entrada / residencial de baixo custo
Common in real estate advertisements and market analysis
Portugal
habitação económica / residência de baixo custo
Used in discussions of social housing and affordable residential market