Housing is a basic human need. In an essentially prosperous country such as Britain, most people have access to housing. Perversely, this has led to more problems than existed when, in the fifties for example, there seemed to be a clear imperative to build more houses. Much of the existing stock is either in the wrong place, or of the wrong type and there remains a strong demand and need for new housing. This book seeks to address the lack of clear principles and practice in the process of adding to the existing stock. This is analyzed, and suggestions are made for a more coherent approach.