Westminster Council is launching a series of simple planning guides to provide advice on common retrofit measures. These explain what permissions you may need, what issues you should consider and how you can make a successful application.
The first of these retrofit guides provides advice on how to retrofit windows to make them more energy efficient and can be found here https://www.westminster.gov.uk/planning-building-and-environmental-regulations/planning-and-climate-emergency/planning-householder-retrofit-how-guides.
Roger Mears Architects were pleased to contribute to the document with template drawings, available to consult in Appendix 1.
The next guides to be published will be air source heat pumps, solar panels and green roofs.