You may be able to claim Housing Benefit for rent paid to a family member, but the rules depend on the living arrangements and whether the tenancy is a genuine commercial arrangement. You will usually not qualify if the relative who owns or lets the property lives in the same home as you. If you are of working age, help with rent is usually claimed through Universal Credit instead, apart from some exceptions such as certain supported or temporary accommodation. Your local council or the official GOV.UK guidance can assess your circumstances.