Objective: Recovery is the process through which one learns to overcome, manage, or live with the negative consequences of physical illness, mental illness, alcohol or drug misuse, or trauma. Homeless individuals endure many, or all, of these experiences. Previous research has shown that characteristics of homeless services, particularly the amount of choice they afford to service users, can influence recovery experiences, potentially by increasing a sense of mastery. The purpose of this study was to test the hypothesis that choice in housing and services would predict recovery in a number of domains, and that these relationships would be mediated by mastery. Method: Using survey data collected from a sample of homeless services users (n = 160) in Ireland, we conducted a series of cross-sectional mediation analyses to predict recovery in domains of physical health, psychiatric symptoms, alcohol and drug use, and community integration. Results: We observed the hypothesized mediational relationship for each recovery domain except alcohol use. That is, personal mastery mediated the relationship of perceived choice to self-appraised physical health, psychiatric symptoms, drug use, and physical and psychological aspects of community integration, but not alcohol use. Conclusions and Implications for Practice: Findings add further support to the growing body of evidence that suggests choice is centrally important to recovery experiences among individuals in homelessness. [ABSTRACT FROM AUTHOR]