The challenge of providing stable housing options for persons with SPMI is reflected in the estimated 45% of homeless persons in the United States who have experienced mental health problems in the past year and the 31% who have experienced mental health and substance abuse problems (Burt et al., 2001). [...] In considering the evidence on the effect of housing on health and quality of life for people with SPMI, we use the term housing in a very broad sense. [...] In several studies, the mean The Wellesley Institute – Enabling Grant Final Report The views and opinions expressed herein do not necessarily reflect those of the Wellesley Institute Effects of Housing Circumstances for People with Severe Mental Illness number of days hospitalized in the year following a housing intervention (a housing placement) was significantly lower than the mean in the preced [...] This mirrors the finding in Section A that hospital utilization does not vary with housing The Wellesley Institute – Enabling Grant Final Report The views and opinions expressed herein do not necessarily reflect those of the Wellesley Institute Effects of Housing Circumstances for People with Severe Mental Illness type for the same population. [...] The remainder of the evidence on housing attributes and health outcomes for people with SPMI is generally of poor quality in terms of study designs, is inconsistent in its definitions and measures and gives very little guidance as to what works and what doesn’t in terms of housing programs for people with SPMI.