Germany have implemented new construction requirements as of 1st January 2016. Heating new buildings without the use of renewable energy is no longer permitted throughout Germany. As of January anyone building a new development in Germany must reach the maximum primary energy requirement that is 25% lower than the previous threshold.
For more information please see http://www.sunwindenergy.com/new-buildings-germany-now-required-to-use-renewable-energy-heating
15th January 2016