To contribute effectively to academic discourse on urban sustainability, disciplines need to think outside their silos and work together more collaboratively. Although straightforward to posit in theory, the practical realities of bringing together people with different worldviews, languages and skills can be frustrating and lead to loss of motivation. This paper presents the findings from a qualitative study of interdisciplinary team working on an urban sustainability project. Through analysis of archival materials, observations and interviews, a major theme of motivation was uncovered and explored. We conclude with some suggestions for working more effectively interdisciplinary, urban sustainability projects.