Part L England 2013 - A summary of the changes (Version 1)

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The Government has a legally binding commitment under the Climate Change Act (2008) to achieve significant reductions in greenhouse gas emissions by 2020 and 2050. Carbon dioxide from buildings, domestic and non-domestic, makes up around 45% of the total UK emissions, primarily from sources which are covered by Building Regulations e.g. space heating and cooling, water heating and lighting. The Regulations therefore, are a primary mechanism for driving a reduction in emissions, by shaping the design of new buildings and affecting improvements to the existing building stock.

This Construction Briefing summarises the changes made in Part L England 2013 (which comes into effect on the 6th April 2014) and explains how they affect TRADA members.

This sheet identifies some of the potential problems which may occur as a result of the transition and the provisions that have been made to make the process smoother, it also examines a number of the criteria which will now be applied to new builds, including CO2 and fabric energy efficiency (FEE) targets.


  • Transitional provisions
  • Summary of significant changes
    • Domestic - new build, Approved Document L1A
           - CO2 and fabric energy efficiency (FEE) targets
           - Limiting fabric standards
           - Solar and other heat gains
           - Quality of construction and commissioning
           - Provisions for energy efficient operation of the dwelling
    • Domestic - Existing buildings - Approved Document L1B
    • Non-domestic, new build. Approved document L2A
    • Non-domestic, existing. Approved Document L2B

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