Cambridge City Council have issued a guide to how various different types of house can be retrofitted to make them more energy efficient. It’s quite a detailed document (71 pages!) setting out a range of steps from minimal cost through to a whole-house retrofit.
![](http://2g3s.staplefordvillage.org.uk/wp-content/uploads/sites/4/2022/12/RetroffitingGuide-1024x772.png)
You can download the guide from here.