In the 17th arrondissement of Paris, a new eco-district is being developed on the railway site of Les Batignolles. Spread over 50 ha, this sustainable district combines all the components of a city (offices, private, mid-range mixed and social housing and shops as well as cultural and leisure facilities) in an environment that is made particularly attractive by a 10 ha park. An exemplary feature of this new district is the strong focus on creativity and architectural diversity, as well as the very demanding requirements for resource conservation and energy saving. Since 2017, the opening of the new Paris Courthouse designed by architect Renzo Piano, and the planned extension of the metro line 14 and the T3 tram line, has consolidated the site’s metropolitan role and added to its appeal.