Reopening of La Hêtraie car park The La Hêtraie underground car park has two levels and is vegetated on the surface. The structure has been closed since 2007 due to a drop in demand from residents. The car park suffers from rising groundwater on the second underground level, in addition to structural degradation. With the ongoing redevelopment of the district (rehabilitation of the residence, RETHINK architect, nursery in project…), the city and Paris Habitat plan the reopening for the residents and employees of nearby educational facilities. Our study proposes different scenarios for the partial or complete reopening of the car park, in view of the structural interventions, waterproofing and upgrading to the standards to be expected. An environmental component provides for the integration of soft mobility as well as an indoor and outdoor qualitative improvement (requalification of the access and fitness field on the ground floor, zenithal lighting…).