The HARMONY Model Suite is an integrated set of models aimed at capturing the dynamics and mobility patterns of metropolitan areas; it is structured over three different levels: 1) Strategic (long- term) demographic land-use transport models, 2) Tactical (mid-term) people and freight activity- based models and 3) Operational (short-term) multimodal network models. This paper presents the Oxfordshire application of the HARMONY Strategic Simulator: a New Housing Development (2030) scenario. This application involves a demographic forecasting model coupled with a regional economy model, both informing a land-use transport-interaction model and a residential land development model in the HARMONY web-based modelling platform.