It is possible to register the buildings and units in the Cadastral Register when they are still under construction, i.e. before they are completed. Generally it is also visible from the Cadastral Register whether the real property in question was completed or not. The completion of the real property should always be evidenced by a corresponding effective decision of a building office approving the usage of the real property for a given purpose. On the other hand, once the real property was registered as a completed one, this registration is hardly ever changed although the property might be under reconstruction.