We investigated the environmental, economic and social impacts of four ERDF funded energy efficiency and renewable energy programmes in social housing in the North West. We interviewed local authorities, housing providers, procurement organisations, main and sub-contractors to learn key lessons about gaining the maximum benefits from such funded schemes. We examined what measures worked best where – external wall insulation, internal wall insulation, solar hot water, solar pv, biomass and where the best savings for CO2 and for residents’ energy costs lie. We drew out how resident engagement and behavior change is a critical part of the project’s success.