Looking after the spatial quality of urban complexes is a very serious challenge in the face of rapidly developing urbanisation processes. From the numerous discussions in the press and other communications, one can conclude that this is a socially important issue. The difficulty, however, is that many of the arguments in these disputes are usually based solely on emotional considerations. This article briefly discusses the method of the Spatial Continuity Diagram, which makes it possible to objectively assess the changes taking place in urban spaces in terms of the harmony of their extension or transformation. In addition, two research modules of the Spatial Continuity Diagram method are discussed: Compliance Calculator and a completely new research instrument called Feature Category Location.