Image credit: City of MelbourneThe 10 story Council House 2 (CH2) building in Melbourne is very likely Australia's Greenest Building. It is the first building in the country to receive six stars in the Green Building Council of Australia rating system.

The building is wrapped with photocell-controlled louvers made of recycled wood which help to temper the interior environment by controlling solar gain. Prominent shower towers are used as part of the cooling system for the building, and a set of large wind turbines on top of the building help to exhaust stale air out of the building. In addition to the visually striking aspects of the building, it also contains a host of features inside that contribute to the building serving as an exemplar of sustainable design.

The building is 12,500 square meters (134,500 square feet) and serves as an office building for 540 City of Melbourne staff, plus ground floor retail space. However, the underground parking includes only 20 parking spaces, but 80 bike spaces are provided (and 9 showers for cyclists are also part of the building's amenitites).