The Code for Sustainable Homes
Code level 3
A home will need to be 25% more energy efficient compared to Part L 2006. This will require low carbon technologies such as Photovoltaic or (PV) modules. Current status – Mandatory for Social Housing since 2008. Mandatory for all private housing development since April 2010
Code level 4
A 44% improvement over 2006 part L Building Regulations must be achieved. This will usually require some PV modules. Current status – Mandatory for Social Housing since April 2010. Mandatory for all private housing development from April 2012
Code level 5
Requires a 100% improvement over 2006 part L Building Regulations. This will require all electricity to be provided from on-site renewable sources including Photovoltaic (PV) modules. As most urban and sub-urban sites will not be suitable for wind turbines, PV will proliferate as the best technology to guarantee these targets. Introduction date TBC
Code level 6
Zero-Carbon will also require PV panels in order to replace entirely the energy taken from the national grid. The additional points to achieve a six-star rating must require investment in energy efficient appliances, reduction of surface water run-off, and the application of a site waste-management plan. Current status – Mandatory for all in 2016
