The transformation of non-heritage protected mid-twentieth century European architecture, especially public housing, is a key contemporary issue that raises several architectural, environmental and social questions. While several examples show the potential for transformation, demolition is unfortunately still considered commonplace, leading not only to the loss of architectural heritage and affordable housing, but also to the destruction of communities built over decades. In this context, architects have an important role to play in proposing alternatives. Within the framework of architectural schools, and in addition to design-based strategies, it seems necessary to confront students as well with a critical analysis of complex demolition processes in theoretical courses. The course “Transformation Strategies” at the HEIA-FR proposes collective research aimed at questioning demolition processes, and at developing a sensitive approach and methodology to reveal architectural, environmental and social values as a basis for the transformation of mid-twentieth century architecture. The first case study aims to question the ongoing demolition process in the Toulouse Le Mirail district, designed by Candilis, Josić and Woods in the 1960s.