Process/product complexity is at present an unavoidable component of present building design approach that affects building productis quality. To overcome this problem, effective collaboration is required among all the actors involved in the design process. Data and information exchange is not sufficient to guarantee mutual understanding, to support effective collaboration among actors, it is required a proper knowledge formalization and management. This paper reports on an innovative structure for knowledge modelling in cross-disciplinary building design, that has been formalized in a general template. The proposed Knowledge Model has been, at present, implemented by means of available ontology editors and is going to be used into teaching courses to check its efficiency in collaborative building design classes.