Value-enhancing investments are: 
- New components that were not previously present, such as energy renovations, a fireplace or a sauna. 
- Replacement of components with components of significantly higher value, e.g. replacement of fitted carpeting with parquet flooring or installation of a higher-quality and better-equipped kitchen.
- Increase in the volume of the building.
In contrast to the increase in value is the preservation of value. This is the case, for example, when a worn chip carpet is replaced by one of equal quality and price, or when everything is freshly painted.