In this paper, a rationale for a participatory approach to mapping is detailed, and its utility illustrated through the detailed reporting of a project concerned with mapping disabled access to the built environment. In this project, disabled people worked with university researchers at all phases of the research process, from formulation to data collection to end product, to create a detailed access map of their local town. The process of participatory research was found to be a rewarding and empowering experience for the disabled participants. Moreover the resulting map provides a significant resource for local disabled residents and has been important politically, being used to successfully lobby for changes to the local environment.