Le "bail réel solidaire" is a special type of lease contract in France created in 2015. It's used by state institutions to rent buildings to poorer people at decent prices. Those lease contracts grant some long term property rights. Unlike normal lease contracts, the duration goes from 18 to 99 years. The contracts don't transfer the ownership of the building itself and have mechanisms to avoid real estate speculation which drive the prices up.

Source: https://location-immobilier.ooreka.fr/astuce/voir/590869/bai...