There are 3 types of housing assistance, which cannot be combined and are granted in the following order of priority:
Personalized Housing Assistance (APL): intended for tenants of new or existing housing that is subject to an agreement between the landlord and the government setting rent adjustments, lease duration, maintenance conditions, comfort standards, etc.
Family Housing Allowance (ALF): intended for individuals who are not eligible for APL and who have been married for less than 5 years or have children (born or unborn) or a dependent.
or Social Housing Allowance (ALS): intended for tenants who are not eligible for either APL or ALF.
To learn more about eligibility requirements and the steps to take: https://www.caf.fr/allocataires/aides-et-demarches/droits-et-prestations/logement/les-aides-personnelles-au-logement
Contact information for the CAF in Lyon: 1 Pl. du 8 Mai 1945, 69008 Lyon
Student hotline: 0 969 32 52 52 from 9:00 AM to 4:30 PM