The expansion of residential buildings in suburban areas makes these places particularly vulnerable to spatial degradation and other problems resulting from this phenomenon. The rapid development of residential housing in peri-urban areas is the source of many unfavourable processes. Their effect is, among other things, the lack of cohesion of the architectural and urban structure of the town, which is one of the elements that deepen the spatial disorder. The subject of presented studies are physical features of buildings, which to the greatest extent determine the disturbance of the scale and form of built-up areas. The authors aimed at creating a new method for assessing spatial cohesion. It allows for the diagnosis of built-up areas and the formulation of guidelines for the design of new buildings as well as changes in local development plans or spatial development studies.