Mixing British architectural history with the most advanced and environmentally-friendly materials, the properties revolutionise occupants’ lifestyles. ​Saving £50,000 over the first 10 years with zero energy bills and minimal maintenance, these properties are packed with innovation. Photovoltaic (PV) panels on the roof not only power the homes’ lighting and appliances but also heat the hot water tank - ​the first in the world with a thermocline control​. Since the homes generate more power than they use, occupants can sell excess electricity back to the grid. Photo: Rick McCullagh