Abstract: This paper discusses the value of a star based rating system for assessing the transport impact of urban development projects and how such a scheme could be introduced. A scheme of this nature would be based on empirically derived performance standards related to the energy efficiency and CO2 emissions generated by travel activity for a particular development in particular type of location. A survey of two case studies within metropolitan Adelaide, the Adelaide City Centre and a suburban office park, Technology Park at Mawson Lakes was conducted in November 2006 to provide the necessary data base underpinning the derivation of the star ratings for three types of urban settings that are typical of Australian and western cities: (1) C.B.D. or major metropolitan regional locations; (2) suburban transit interchange nodes; and (3) suburban settings. The use of a travel energy development rating tool for commercial office developments to postulate new development standards allows planners to theoretically justify planning decisions that reject developments with poor accessibility from an energy efficiency perspective whilst encouraging developments that have high accessibility to non-energy intensive travel modes such as walking and cycling.