Virtual Organisations in builsing construction often consist of dozens of contractors and subcontracters in a complex network. Delegation of work and responsibilities are often not very well defined and hence is an error prone process than can lead to considerable costs. The goal of the BauVOGrid project is to increase the operationalibility of a real "Bau-VO" by applying a building-Grid. BauVOGrid will built an authentication and authorisation infrastructure on top of the basic D-Grid and combine this into a coherent management infrastructire for Virtual Organisation (VO) processes. All types of resoruces can be combined and presented in the office or at a construction site. Four key technologies are being integrated to achieve this result: D-Grid, Semantic Web, Process managemetn and mobile information management.