Measures to reduce energy consumption and decrease CO2 emissions in the buildings sector have been on the political agenda for years. To support the efforts of both private and public property owners and in pursuit of carbon reduction policy goals, KfW has been promoting investment in energy saving and CO2 reduction since the beginning of the 1990s. These activities target an important element of the German Federal Government’s autumn 2010 energy concept [BMWi, 2010]. The decision to exit nuclear energy has further increased the importance of the building sector’s contribution to energy efficiency and climate protection [BMWi, 2011]. It is expected that standards for building efficiency will be raised significantly. In particular, as part of a balanced overall view which considers the burden on those owning or renting property, future revisions of EnEV 2009 (the Germany Energy Conservation Ordinance for Buildings) should gradually develop the standard for new buildings towards the future pan-European “nearly Zero-Energy Building Standard”. Evaluation of KfW programmes in this area over the funding years 2005 to 2010 showed positive results, not only in terms of investment stimuli, energy savings, CO2 reduction and impact on employment [Clausnitzer et al., 2010, Clausnitzer et al., 2007, Clausnitzer et al., 2008, Gabriel & Balmert, 2007, Diefenbach et al., 2012], but also in their effectiveness with regard to public finance budgets [Kuckshinrichs et al., 2010b, Kuckshinrichs et al., 2010a, Müller, 2012].