Adapting historic buildings for a greener future does not have to come at the expense of their heritage value. This Advice Note provides practical guidance on how sensitive repair, maintenance and adaptation can help historic buildings remain in use while improving energy efficiency, reducing carbon emissions and responding to the impacts of climate change. It explains the permissions that may be required for common decarbonisation measures and supports informed decision-making when balancing climate action with protecting historic places.

Primarily aimed at local planning authorities, heritage professionals and others involved in the planning process, the guidance is also relevant to building owners and occupiers considering energy efficiency improvements. The February 2026 revision strengthens the resource with links to case studies and information on building regulations, greater clarity on energy efficiency policies and relevant legislation, and technical refinements covering measures such as floor, external wall and cavity wall insulation. Together, these updates provide a clearer framework for making historic buildings more resilient, energy efficient and fit for the future while safeguarding what makes them significant.