The Construction Law classifies construction facilities into buildings, structures and landscape architecture structures. Only the building is defined explicitly (with no components defined). The structure, however, is a non building facility. Such treatment of the aforementioned issues poses a lot of problems from the outset. This includes, among other things, sports stadiums. Classification of construction facilities into buildings or structures is significant, for instance, in determining the property tax. This complex, interdisciplinary and important issue is considered in this article. Keywords: construction facilities; buildings; structures; sports stadiums; qualification; definitions.