Extensive study of the Housing First support paradigm has demonstrated the benefits that affordable housing and appropriate, available supports can have on the housing success of formerly-homeless individuals living with mental illness and addiction. [...] This system was designed to give priority access “Are we repeating the mistakes of to housing to the economically disadvantaged, de-institutionalization in the 1960s? [...] But in the absence from purpose-built supportive housing transferred of new funding and little rental housing to the Ministries of Health or Community and development of any sort, it also returned social Social Services. [...] What the Ontario Government, LHINs and service managers can do: • Expand Ontario’s supply of social and supportive housing to improve outcomes for applicants and tenants and allow the system to function more effectively.