In Italy and abroad one of the main drivers of innovation in the building sector is actually the energy sustainability; its application in residential projects is more and more crucial to the quality of the project and its effectiveness in terms of performance. This paper focuses on all the aspects of the social and environmental sustainability of the project, and it describes the sustainable technologies utilized to build it. In particular, the paper focuses on the social housing intervention called "Cenni di Cambiamento" in Milan (Italy), which is placed in the research frame of the achievement of sustainability, declined in its broadest sense by the growth strategy of Europe 2020. ???Cenni di Cambiamento??? is known in Europe as the most advanced social housing project from the technological point of view, because it utilizes an experimental building system made by bearing wooden panel, cross-layered, whose potential allows to build multilevel buildings with high eco-green performance. Completed in 14 months, the towers in Via Cenni, with their 9 floors above ground, offer innovative housing solutions based on the culture of sustainable and cooperative housing. The choice to use an innovative construction technology was dictated by the necessity to build the towers in a short time, without compromising the quality of the building, but even raising the building performance designed to contain and control the consumption of energy and resources.