The 10 houses of Hem are the first homes rehabilitated in France to zero energy and any form of consumption guaranteed for 25 years. Energiesprong is an initiative initiated in the Netherlands in 2013. Vilogia tested in France the first prototypes of this approach on 10 houses built in 1950 in Hem near Lille. Vilogia aims to rehabilitate 500 homes over 5 years using the same method. The Energiesprong method is as follows: using the current technological tools (digital and industrial method) to rehabilitate a dwelling in 3 weeks.