Barcelona has told landlords to rent out their empty apartments or risk losing their properties. Property owners without tenants could be forced to sell their properties at half the market value to the city government, which will then rent them out to lower-income residents. Cities across Europe are looking to rein in short-term letting platforms. In Lisbon, landlords can rent their apartments to the municipality which will find tenants through its affordable housing programme. Budapest, meanwhile, plans to limit the number of days properties can be rented out as holiday homes.