The latest official statistics on the code for sustainable homes and average energy efficiency (SAP ratings) were released on 24 May 2013.

Statistics in this release relating to the code for sustainable homes show the number of dwellings that have been certified to the standards set out in the ‘code for sustainable homes: technical guidance’.

https://www.gov.uk/government/publications/code-for-sustainable-homes-and-energy-performance-of-buildings-data-march-2013