This book focuses on the demand side approach in building decarbonisation within the context of developing countries. This book is embedded within the poverty-urbanisation framework and provides understanding of the unique challenges faced by developing countries. It provides key pathways for decarbonising the demand side of building energy in developing economies. This book is divided into five parts. The first part provides introduction to the building energy industry within the developing context and a backdrop on decarbonisation. This establishes the main theme as well the key concepts that will undergird the discussion of the pathways within the book. The second part delves into building design and various elements that influence building decarbonisation at the design stage. The third part explores the building material and looks at local sustainable materials, emerging circular materials and various indigenous construction methods. The fourth part looks at the array of renewable technologies available, the challenges and the level of uptake. Further, it proffers solutions on increasing their usage within the developing country context. The final part goes into issues related with building assessment, building regulations and urbanisation. This book provides a guide for emerging countries' demand-side decarbonisation of building energy.