The COVID-19 pandemic has profoundly affected the relationship between people’s behaviors and residential spaces, bringing to public and academic attention, on the one hand, the exacerbation of pre-existing problems and, on the other, the potential of spaces, such as communal gardens and apartment-block terraces, to become important resources of sociability or privacy. Overall, this raises the question of how to assess the responsiveness of the existing residential stock to needs that transcend the traditional concept of housing adequacy—e.g., the need for adaptable, open, and livable spaces. This research moves from the assumption that underused spaces in residential neighborhoods represent a crucial asset for creating new economic and social values through architectural and urban projects. Consequently, moving from an in-depth observation of a selection of public housing buildings in Turin as a paradigmatic case study, the aim is to explore the potential for the adaptive reuse of residential spaces at different scales—from the apartment to the neighborhoods—highlighting the implications for design. In doing so, the paper puts forward a methodological approach, which widens the way housing adequacy is normally assessed, by focusing on the possibility of transformation of often neglected spatial resources.

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The concept of sustainable development is closely related to that of sustainability assessment, as it implies a process of evaluation of progress made over time. In this context, indicators present themselves as a key and fundamental element for measuring and evaluating the specific issues that compose the different phenomena to be monitored. Indeed, they constitute the tool that can provide qualitative or quantitative data and information needed to identify the performance, progress, and weaknesses of plans, projects, and policies. In this context, the paper investigates the potential differences that the indicator can take in the differing purposes of measurement and evaluation in the context of urban sustainable development. A literature review is therefore conducted to gather and systematize knowledge so that it can be useful for reflections on sustainable urban assessment. The paper reports the results of the analysis concerning the context of measurement and evaluation, highlighting the differences or similarities from a conceptual and operational point of view.

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