In this paper the authors attempt to stress the social dimension of design and the role of explicit support for human-level interaction during design systems integration. A human-centred approach is proposed by taking design integration as the collaborative use of design artefacts, and a virtual studio environment (VSE) framework is presented as an integration vehicle to link the social and technical dimensions. A VSE consists of two subsystems: the VSE base system and the domain resources. While common generic facilities for human-human interaction are embedded within the VSE base system, the domain-specific resources are loosely coupled into VSE via resource agents. A VSE prototype for the domain of building design is described, and a demonstration of the use of the VSE prototype is presented. This is then followed by some discussion on related research and further work.