Equity capital is the funds which a buyer has to bring up himself in order to purchase a property. This can also include cash or savings.
All homeowners of a housing complex make up a community association. It cannot be dissolved because it is legally bound. All parties must make decisions together and are represented externally by a trustee (WEG trustee).
The energy pass is understood to be a quality seal for real estate. Similarly to a refrigerator, the energy pass clarifies the energy efficiency category of a property.