One Angel Square, Manchester

One Angel Square in Manchester achieved a BREEAM Outstanding rating of 95.16%, the highest ever recorded in the UK at its 2013 completion — faster than the average for BREEAM-certified buildings, which typically score around 70%. The Co-operative Group's headquarters uses 80% less energy than a conventional office of similar size, thanks to a double-skin facade that traps warm air between layers, reducing heating costs by 50%. It runs on biofuel derived from food waste, supplying its own combined heat and power plant. The building's natural ventilation system, controlled by automated windows, cuts cooling energy by an additional 30% compared to typical air-conditioned offices.