Prof. Nasarre was invited to the session “Alternative mechanisms of access to property” in the Course of the General Council of the Judiciary “The current problem of the use of urban real estate: from their lease to collaborative housing” held between May 6 and 8, 2019 in the Judicial School. Dr. Nasarre reviewed the situation of housing in a European context, with special emphasis on intermediate tenures and the recent reform of urban leases, which are now contested as unconstitutional.