This research study addresses the issues associated with lost and wasted urban spaces. Lost and wasted spaces refer to areas which have no human activity or proper human interaction. They are the leftover unstructured landscape at the base of buildings. They also include abandoned buildings, waterfronts, train yards, vacated military sites, and industrial complexes. The research outlines the causes of lost and wasted urban spaces which occur within the eThekwini Municipality and urbanised spaces in general. Through the use of case studies and precedent studies, the research study investigates the various techniques, technological advances and approaches that could alleviate wasted spaces in the city. The Durban Esplanade and Point Waterfront development constitute the main case study areas; however, to fully understand how and why lost and wasted spaces occur within the urban environment, various other spaces which make up the cityscape were also investigated. For example, the city transport infrastructure and green spaces do not form part of the case studies, but have been included as part of the research into lost and wasted spaces. The research study seeks to take the issue of lost and wasted urban spaces a step further by combining it with issues related to sustainability. Through the use of the case studies, various possible solutions and alternatives to the alleviation of lost and wasted urban spaces are outlined and investigated. Examples of how lost and wasted urban spaces could be transformed from problem areas to spaces of opportunity are also explored. This was achieved by making use of computer-aided design and graphic illustrations to indicate the possible solutions that could form part of a holistic approach to the issues surrounding lost and wasted spaces in the built environment. The current planning legislation is outlined in order to provide a thorough understanding of the interconnection between environmental and sustainability issues which relate directly to the cause of lost and wasted spaces. Furthermore, the research study highlights the involvement of various built environment disciplines, including planners, architects and urban designers and investigates their role in the alleviation of lost and wasted urban space. / M.T.R.P. University of KwaZulu-Natal, Durban, 2012.