Federal legislation to support the development of transitional housing programs for homeless people (TH) was first introduced in 1986, and ultimately incorporated into the first Stewart B. McKinney Act in 1987 as part of the U.S. Department of Housing and Urban Development's (HUD) Supportive Housing Program (SHP). HUD's division of Community Planning and Development has had responsibility for the SHP since 1989, when a new administration brought all the McKinney Act housing programs together within the new Office of Special Needs Assistance Programs, which manages and directs the program. By 1996 there were about 4,400 transitional housing programs offering about 160,000 beds (Burt et al. 1999). By 2007 there were almost 7,300 transitional housing programs offering about 211,000 beds. About 53 percent of the TH beds reported in 2007 are designated for families (HUD 2008), creating a capacity to serve about 40,000 families at a time.

Homelessness prevention is an essential element of any effort to end homelessness either locally or nation-wide. To close the front door of entry into homelessness, the central challenge of prevention is targeting our efforts toward those people that will become homeless without the intervention. This book identifies elements of community homelessness prevention strategies that seem to lead to reductions in the number of people who otherwise would become homeless. The contributing elements include targeting through control of the eligibility screening process; developing community motivation; maximising mainstream and private resources; fostering leadership; and ensuring the availability and structure of data and information used to track progress, improve on prevention efforts, and facilitate outcome-based contracting. Evidence from the six communities studied indicates that those employing the most elements seem to be more successful at prevention and better able to document their achievements. This book also identifies four promising homelessness prevention activities that may be used alone or in combination as part of a coherent community-wide strategy: (1) supportive services coupled with permanent housing, particularly when combined with effective discharge from institutions, especially mental hospitals; (2) mediation in Housing Courts; (3) cash assistance for rent or mortgage arrears; and (4) rapid exit from shelter. This study provides insight into approaches that will help prevent homelessness. It is an important contribution to our understanding of how to help homeless Americans.