Eco Houses:  

From 2012 – 2016 Transition Town Lewes ran an event:  Open Eco Houses.

Local residents who had eco upgraded their homes made themselves available for a weekend to share their experiences and demonstrate the work they had done.  Below are links to the publications produced, for some in depth analysis of what is possible in retrofitting a Lewes home.
2016 Eco Houses
2014 Eco Houses
2013 Eco Houses
2012 Eco Houses