Achieving a sustainable building is not just a matter of design and construction: what happens once the building is occupied is absolutely critical. This book shows how the choices designers, developers and building users make impact on sustainability over the life span of the building. The authors show how a holistic approach considering costs, energy use, environmental impact, global warming potential as well as items which a usually disregarded such as finishes, furniture and appliances is needed to achieve best practice. * How-to assess life-time costs and environmental impact of buildings * Predict and assess the impact of user behaviour on sustainability * Uses case studies to illustrate the importance of different factors