In Germany, anyone who wants to build an energy-efficient building or renovate an old building does not have to do it entirely out of their own pocket. There are a number of ways to obtain financing and / or subsidies for heating and other measures. At the federal institutions (KfW, BAFA) you can get low-interest loans and grants for your new building or your heating modernization. In some federal states there are also interesting regional funding programs. In addition, financing offers from the house banks and other financing partners may also be of interest in some cases.