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  1. Building Regulations
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  3. Approved Document L (Conservation of fuel and power)

Part L (Conservation of fuel and power)

The energy efficiency requirements of the Building Regulations are set out in Part L of Schedule 1 to the Building Regulations and in a number of specific building regulations.

Technical guidance is contained in four Part L Approved Documents and two building services compliance guides.

There are also links to further information relating to Part L.

Approved Documents L1A, L1B, L2A, L2B

View current and earlier editions of the Part L Approved Documents.

Domestic and Non-Domestic Building Services Compliance Guides

View current and earlier editions of the Building Services Compliance Guides referred to in the Part L Approved Documents.

Research Reports

The Building Regulations are underpinned by research which aims to provide a sound scientific basis to the requirements and guidance relating to each of the technical parts.

Part L Consultations

Before bringing into effect changes to the technical requirements, or the supporting Approved Document(s), of the Building Regulations, Government seeks views on the proposed changes through a formal consultation process.

Impact Assessments

Government departments assess the likely outcomes of regulating in order to try to achieve the right balance between under-regulating, which may fail to protect the public, and over-regulating, which may create excessive bureaucracy.

Frequently Asked Questions

This section provides answers to frequently asked questions (FAQs) about Part L of the Building regulations.

Determinations and appeals

The Secretary of State for Building Regulations may issue decisions on applications for determinations of compliance with the technical requirements of the Building Regulations, or appeals against a local authority's refusal to relax a requirement.

Associated documents

To assist with meeting the Requirements of Part L (Conservation of fuel and power) there are a number of tools and documents available by following the links here.