This paper proposes new quantitative research methods with computational fluid dynamics (CFD) tools for a sustainable urban design project. This research study is sponsored by Research Councils UK (RCUK) China office. This project is part of the Caofeidian International Eco-town development in North-Eastern China. The research programme addresses the main aspects of good practice in terms of eco-design and sustainability. These aspects include wind flow analysis around buildings, pollutant dispersion in water systems and noise control on urban highways. This programme aims to explore a range of research methods in order to enhance the performance of integrated design with a comprehensive planning stage. The pros and cons, alongside other deficiencies in current forms of comprehensive plan are to be explored further. This project evaluates the Chinese Planning System and introduces new ways of achieving sustainable urban design. The integration in assessment and evaluation across professions and subject boundaries is emphasised to identify the key gaps between sustainability and design.