As part of its climate change programme, the federal government decided in October 2000 to reduce CO2 emissions from government properties by 30 percent as against 1990 by 2010. In order to meet this voluntary commitment with innovative solutions but without additional budgetary appropriations, the pilot project "Energy Contracting for Federal Government Properties" was called into being in 2002.
Energy efficiency of residential buildings, but also of buildings used for other purposes will play a much more important role on the real estate market than ever before. The energy certificate for existing buildings, which sellers or landlords will have to show to potential buyers or tenants is designed to contribute to that end.
As part of the project "Existing Low-Energy Houses", a total of 143 buildings have been or are being modernised to an exemplary level of energy performance. These buildings modernised as "low-energy houses" are on average around 50 percent more energy-efficient than is required of comparable new buildings by the Energy Conservation Regulations (EnEV). The modernisation draws on energy-efficient construction methods as well as urban planning experience with sustainable modernisation of residential buildings.