Energy efficiency—Part L of the Building Regulations
Published by a LexisNexis Planning expert
Last updated on 11/11/2021

The following Planning practice note provides comprehensive and up to date legal information covering:

  • Energy efficiency—Part L of the Building Regulations
  • Legislative background
  • What is Part L of the building regulations?
  • Use of software
  • Eligibility and exemption
  • Key changes
  • Zero-carbon policy
  • Future developments
  • England
  • Wales

Energy efficiency—Part L of the Building Regulations

STOP PRESS: From 15 June 2022, changes to Part L (Conservation of Fuel and Power) and F (Ventilation) of the Building Regulations come into effect. This Practice Note is being updated to reflect these changes.

Updated in partnership with WSP

Legislative background

The Building Regulations 2010 (Building Regulations 2010), SI 2010/2214 set out the basis of legislation for building work in the UK. Most building work (including new constructions and modifications to existing buildings) are therefore subject to building regulations approval which can be gained through a local council or an approved inspector.

Relevant legislation includes:

  1. Building Act 1984

  2. Building Regulations 2010, SI 2010/2214

  3. Building (Approved Inspectors etc) Regulations 2010, SI 2010/2215

  4. Building (Scotland) Act 2003

The Building Regulations Approved Documents (ADs) are essentially the instruments that ensure policies set out in legislation are being carried out, providing practical guidance on ways of complying. They cover 15 separate sections (Parts A to R) stating the relevant legislation using extracts from the Building Regulations 2010, SI 2010/2214 and giving examples of how a development may deem to satisfy the provisions detailed.

There have been a number of changes in both the Building Act 1984 and the relevant building regulations since their original inception to amend and extend their scope.

What is Part L of the building regulations?

Part L covers the conservation of fuel and power (energy efficiency)

Related documents:
Key definition:
Energy efficiency definition
What does Energy efficiency mean?

Reducing energy consumption while still maintaining similar levels of output or performance. This is usually achieves by reducing wasted energy or increasing the power efficiency of appliances.

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