This Toolkit aims to support planners, developers, consultants and other interested parties with planning policies in London which require renewable energy in new developments or major refurbishments. It offers advice on which renewable technologies are suitable to London including esthetic issues, risks and reliability. It gives an insight into the costbenefit analysis of installing renewables, information on successful case studies and suggestions on how problems can be overcome. More importantly it helps to understand how to comply with the requirements of the London Plan and relevant borough development documents. It offers in-depth calculations for use by consultants to help determine the most appropriate renewable for each scheme. One of the main drivers for such policies is global climate change, the impacts of which are just starting to be felt.