This resource guide documents 12 examples of promising practices in supportive housing for people with mental health and addiction issues from across Ontario. Each case study has a distinct approach, but common themes were identified across these twelve specific examples – regarding supports, housing and partnerships. In addition to those themes, the challenges and successes demonstrated through the case studies pointed to system levelimplications and opportunities for improvements across the sector includingmore affordable housing, further standardization in some areas, and enhanced system coordination. The case studies documented in this guide are examples of the high quality work that is being done across the supportive housing sector. They serve as replicable or adaptable examples of promising practices in supportive housing along with shared resources that can be borrowed and modified for use in other supportive housing programs. This resource guide is intended firstly for providers and secondly for policy and program staff in provincial ministries, municipalities,1 and Local Health Integration Networks (LHINs). This guide is part of a project that also includes an online forum where people can connect with case study participants and project staff to share knowledge and resources, and identify areas for further investigation.