The Children’s Bureau, within the Administration for Children and Families (U.S. Department of Health and Human Services), funded a multi-phase grant program to build the evidence base on what works to prevent homelessness among youth and young adults who have been involved in the child welfare system. Known as Youth At-Risk of Homelessness (YARH), this program funded 18 organizations for the first phase for two years. During the planning phase, grantees conducted data analyses to help understand their local population and develop comprehensive service models to improve outcomes in housing, education and training, social well-being, and permanent connections. This issue brief offers insight into the important questions that arose from the planning phase about how to continue interventions to prevent homelessness among this population without federal funding. Furthermore, the authors present the lessons learned about the types of support grantee participants will need in their efforts to reduce youth homelessness moving forward. (author abstract modified)