A short overview of the Torre Verde development, which was the first residential bio-climatic building in EXPO'98's intervention area. It has 41 bio-climatic apartments distributed across twelve storeys, and a total area of 7200m2. It includes five different base typologies ranging from two to four bedroom apartments.The Torre Verde is an attractive, low energy building, and performance monitoring over a 12 month period has shown that its CO2 emissions are around 24 tons less than a conventional building of the same size and use.