Building Information Modelling (BIM) has been proven as an innovative approach to bring values to construction projectsas well as stakeholders, including construction consultancy firms. BIM adoption could assist construction consultancy Small and Medium-sized Enterprise (SMEs) inenhancingtheir competitive capability. Using a case study with a pioneer BIM service providers whichis an SMEin Vietnam(the Consultant), the paper explores the core competences for deliveringBIM services in relation with potential competitive advantages. Fourtypical BIM market segments have been discovered, which include:i) BIM strategic services, (ii) BIM services, (iii) BIM-enabled services, and (iv) BIM tools development. Exploring six BIM cases, the realizedcore competences of the Consultant which are reported in the paper includethe BIM-related skillful human resources (both in-house and from external), BIM know-hows, reputation, and also the benefits from a BIM network that the Consultant established as an outcome of a granted BIM research project. Focusing on only the first three market segments, the Consultant has taken advantage of their core competences to deliver differentiation and focus strategies to compete and generate competitive advantages.Cost leadership strategies were not very successfulin the case study due to that the economies of scale could not be met; however, they can be considered withthe provisionof BIM-enabled services whenBIM services are delivered together with other consultancy and/or construction services.