CLG Part L Consultation: Spring 2012 - A summary of the significant proposed changes (Version 1)

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In January 2012 the Government launched a consultation package as part of the planned 2013 changes to the Building Regulations, inviting review and feedback on proposed changes to the technical aspects of the Regulations and building control system.

This Construction Briefing was published in response to the CLG consultation and provides a high level summary of the changes proposed in section two which relates to Part L (Conservation of fuel and power).

This briefing explains to readers why the consultation was necessary, what significant changes can be expected and how these changes affect the construction industry in practice.

The guide also contains tabular summaries of the various criteria, for both new and existing dwellings, proposed following the consultation.


  • Context and objectives
  • The consultation package
    • Overall proposals
    • Proposed changes to technical guidance
    • Consultation stage impact assessment
    • Associated consultations
  • Summary of significant changes
    • Domestic - New build. Approved Document L1A
           -CO2 and fabric energy efficiency targets
    • Domestic - Existing buildings. Approved Document L1B
    • Non-domestic - New build. Approved Document L2A
    • Non-domestic - Existing. Approved Document L2B

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