The city of La Rochelle is strongly committed to actions in favour of the ecological transition. In 2014 and 2018, energy policy was rewarded with the award of the European Cit’ergie label. In 2015, the city again distinguished itself by receiving the 2015 Citizens’ Energy Award with the Special COP21 Award presented exceptionally at the United Nations Climate Change Conference in PARIS. In this ambitious framework of proactive policy, the project to rehabilitate the roof of the Municipal Technical Centre is intended to reduce energy needs by about 21 000 kWh/year.