The project consists on the retrofit of 65 “Hard to Treat” homes in south Norfolk. The homes are an eclectic mix of construction methods, with inefficient heating systems. The design solutions will improve the energy performance of the houses by 80%. It includes the placement of Solar Thermal and Photovoltaic Solar panels and the refurbishment of the facade system, providing better insulation when required. A thermography test showing the heat loss is carried out before and after the retrofit.