In order to meet the requirements of the Grenelle de l’Environnement, the SIA Group, after completion of its carbon balance, is committed to a proactive policy to rehabilitate its most energy-intensive buildings. In addition, the SIA Group is engaged in a reflection on the future of its mining heritage. It appears today that the mining housing stock is one of the fundamental components of the attractiveness of the mining basin territory. However, these mining cities, sometimes of exceptional quality, nevertheless remain a necessarily evolving housing stock in order to continuously meet the construction standards and the housing needs of the population. Thus, only a cross-cutting approach, taking into account social and urban issues, technical and environmental constraints, needs of the population and economic feasibility, will make it possible to perpetuate a mining heritage with multiple assets but also today ageing.