For example, finance the energetic renovation with a partial sale of the property
(djd). Saving energy when heating not only protects the environment, but in times of drastically increased energy prices it is also good for your wallet. Replacing windows and heating, installing a solar thermal system or insulating the roof and facade: Depending on the measure, up to 20 percent of the heating costs can be saved. And the more measures you combine, the greater the savings potential. But that costs money, even if the modernization is funded by the state KfW. Older people in particular, who usually also live in older properties, have often paid off their mortgage for the rest of their lives and now no longer have sufficient reserves for a costly renovation.