More bright green British building. Millennium Green, a 24-home development in Collingham, Nottinghamshire, sports a number of cool sustainable features:

Of particular note are the various water efficiency measures. The homes were fitted with the ‘Freerain’ system, which is an advanced rainwater harvesting system developed by Gusto. The rainwater system uses underground storage tanks big enough to provide non-potable water to the home for 18 days. If the supply of rainwater becomes too low, the tank is automatically topped up by mains supply. Homeowners are able to observe whether their tank is being supplied through the mains by a light in the control box. The harvested water is used in the homes for toilet flushing, washing machines and for gardening purposes. Various water efficient appliances complement the rainwater harvesting system. Analysis of the water use in two homes fitted with monitoring equipment showed that harvested rainwater accounted for 50% of water consumption in the houses.