This rapid evidence review shows that Housing First is highly effective in ending homelessness among people with high and complex needs, but it does not constitute an entire solution to single homelessness, or rough sleeping, in itself. The international evidence, including Finnish experience, shows that Housing First services need to be a part of an integrated homelessness strategy to be truly effective. Fully recognising the effectiveness and strengths of existing homelessness services, building strong preventative services, employing Housing First and exploring the possibilities around other innovations such as Critical Time Intervention, within an integrated homelessness strategy that rigorously monitors outcomes, is the best way to tackle homelessness
