Old to New presents twenty-six richly illustrated, detailed case studies ranging from a 17th-century farmhouse extension to basement and garden additions for Victorian terraced houses, to a zero-carbon new-build house surrounded by gardens. The projects are described in the genial words of the architect, who relates the personal brief of each client - whether it was the need for more space for growing teenagers, or the desire to adapt family living spaces for a couple heading into retirement - and presents in clear and sympathetic detail the reasoning behind his designs, choice of materials and methods for achieving sustainable outcomes. In addition to the project descriptions, four essays by the architect address issues particular to his design philosophy and his work with period houses. 'Working with Old Buildings' describes the key challenges in expanding and renovating older houses. 'How to Green Your Old House' talks about solutions for energy efficiency. 'Working with Glass' discusses the architect's innovative use of this constantly evolving material, and 'Cultural Shifts in House Design' explores the way rooms and their uses have evolved over time.