The comparative study of housing decommodification lags behind classical welfare state research, while housing research itself is rich in homeownership studies but lacks comparative accounts of private and social rentals due to missing comparative data. Building on existing works and various primary sources, this study presents a new collection of up to forty-eight countries’ social housing shares in stock and new construction since the first housing laws around 1900. The interpolated benchmark time series generally describes the rise and fall of social housing across a residual, a socialist, and a Northern-European housing group. The decline was steeper than for the classical welfare state, but the degree of erosion was surprisingly small in some countries where public housing associations remained resilient. Within the broader housing welfare state, social housing correlates positively with rent regulation and allowances, but negatively with homeownership subsidies and liberal mortgage regulation. A multivariate analysis shows that social housing is rather explained by housing shortages and complementarities with rental and welfare policies than by typical welfare state theories (GDP, political parties). Generally, the paper shows that conventional housing typologies are difficult to defend over time and argues more generally for including housing decommodification in welfare state research.

Housing tenure takes a variety of forms, the most common of which are rental and owner-occupation. Currently, in the United Kingdom (UK), approximately 70% of older people live in owner-occupier properties, with the majority of the remainder renting from a public or private landlord. Research has consistently shown higher levels of morbidity and mortality among renters compared with owner-occupiers. However, it is unclear whether this is due to tenure acting as a proxy for other indicators of socio-economic status, such as income, which directly influences health, or whether other characteristics associated with tenure, including housing quality and location, explain the association. Untangling these competing influences of tenure on health is important, as it may provide clues on tackling health inequalities at older ages. Tenure too, appears to be related to the risk of long-stay care admission, with owner-occupiers significantly less likely to leave their home than renters; more work is required to identify why this is the case, as it may provide some insights on facilitating ageing in place.