Urban codes have a profound influence on urban form, affecting the design and placement of buildings, streets and public spaces. Historically, their use has helped create some of our best-loved urban environments, while recent advances in coding have been a growing focus of attention, particularly in Britain and North America. However, the full potential for the role of codes has yet to be realized. In Urban Coding and Planning, Stephen Marshall and his contributors investigate the nature and scope of coding; its purposes; the kinds of environments it creates; and, pe