My doctoral research is the development of integrated software and methodologies that tighten the design optimisation loop. The research has three main foci. Firstly, the development and integration of advanced parametric modelling tools. These will enable designers to capture and manipulate design intent, and then programmatically generate dependant representations. Secondly, the development and integration of analysis tools. These will assist the qualitative assessment of building performance and allow the semi-automatic optimisation of the parametric model. Finally, I intend to investigate enhanced user interfaces, as an enabler for first two foci.