The significant environmental impacts of the existing housing stock are just being realised, as well as the potential to improve environmental performance.  In 2006 BRE launched the EcoHomes methodology for eXisting Buildings (XB).  Supported by the Housing Corporation, XB is an assessment tool to assist with improving the environmental performance of existing stock of managed housing through planned and small scale maintenance programmes. 

Sustainable Homes provides a range of services on improving the environmental performance of the existing stock, including training and implementation of actual assessments.