Buildings create an environment where people work and live, thus affecting their quality of life. In Hong Kong, as in other major metropolitan cities, buildings define its city image and are the hub of a considerable amount of financial investments by individuals, families and businesses. For all these reasons, it is important to understand the life-cycle of buildings. Ageing buildings and the problems and opportunities they present have significant policy ramifications and implications for both the building and social sciences. This book provides an understanding of the life-cycle of buildings, how they age, and what can be done when they become old. New dimensions are given in evaluating urban renewal and addressing how, through rejuvenation, the value of ageing buildings may be increased.