The creative process of actualisation of urban structure is to a great extent influenced by objectively acting urbanisation regularities. The paper characterises some of the transformation and interaction regularities, their creative use is determined by the quality of the interference to the changing city structure. The transformational regularities of intensification, integration, homogenization etc. are analysed together with the interactional regularities of structure articulation, e.g. polarisation, different urbanity, gravitational effectiveness etc. Recognising of this urbanisational regularities enables to formulate conceptual principles.