Energy and greenhouse gas emissions. Volume 1: Dwellings. 2026 edition - for use in England (Applicable to works from 24 March 2027)

Building Regulations 2010: Approved Documents L-1 (2026)

HM Government, 2026
Energy and greenhouse gas emissions. Volume 1: Dwellings. 2026 edition - for use in England (Applicable to works from 24 March 2027) Download document

Document Status

Current

Supplement

Core Supplement

Series

Building Regulations 2010: Approved Documents

Abstract

Provides practical guidance for complying with the energy efficiency requirements of the building regulations; aiming to conserve fuel and power and reduce greenhouse gas emissions for dwellings. Covers calculations for: the energy performance of dwellings, the target and primary energy rates, emission rates, and fabric energy efficiency rates. Also considers limiting heat gains and losses and fixed building services' energy efficiency and controls, carbon and energy performance of building services, pressure testing, air permeability, commissioning, installation, certification, inspection, testing, and information.

History

Will supersede Building Regulations 2010: Approved Documents L-1 Conservation of fuel and power. Volume 1: Dwellings (2021 edition incorporating 2023 amendments - for use in England) (HMG, 2023) on 24/03/2027 for non-HRB works or 24/09/2027 for HRB works. Takes effect on 24 March 2027 for non-HRB building works or 24 September 2027 for HRB building works. First published March 2026. Read with: Building Circular 01/2026 Building Act 1984. Building Regulations 2010. Building Regulations etc. (Amendment) (England) Regulations 2026 (SI 2026/335). New Approved Document L, Volumes 1 and 2. New Approved Document F, Volume 1 (MHCLG, 2026).

ISBN

9781918216042

Subjects

  • Environmental issues/energy
  • Thermal insulation
  • Energy efficiency/Energy Management
  • Building control
  • Legal issues and management
  • Building control, England
  • Special subject areas

Information

NBS

NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

Accuris

We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.