Our urban forests, the trees and woodlands in and around our towns and cities, provide numerous environmental, economic and social benefits. As the most important single component of green infrastructure these trees have a vital role to play in promoting sustainable communities. In April 2011, for the first time in Britain, the relevant professional bodies concerned with urban trees and the built environment came together to hold a major international research conference. With some 400 delegates, ‘Trees, People and the Built Environment’ was one of the biggest tree conferences ever held in Britain. Hosted by the Institute of Chartered Foresters, the event featured leading expert practitioners and research scientists from around the world presenting papers that ‘showcased’ the very latest research and innovative practice. These conference proceedings are expected to make a significant contribution to the literature on urban forestry and urban greening.