This book provides the first comparative assessment of the energy-efficiency retrofit programs in the social housing sector of Canadian cities, focusing on program efficiency and effectiveness. The analytical framework explores key policy instruments - regulatory, fiscal and institutional - in relation to major results achieved. The approach is interdisciplinary, supported by rich empirical data from case studies, observations and interviews. The book explores important strategies for the provision of green and affordable housing, while addressing climate change imperatives and resilience issues. This is of great interest to researchers, policy makers, city leaders, professionals and students. Its value added contribution to scholarship is complemented by practical relevance for social housing organisations in countries with a small residual housing sector. It offers valuable lessons for the design, planning and implementation of energy retrofit programs in North America and beyond.