Building Regulations 2010: Approved Documents L-1 (2026) Energy and greenhouse gas emissions. Volume 1: Dwellings. 2026 edition - for use in England (Applicable to works from 24 March 2027)

Publication Year

2026

Document Status

Current

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.

Document 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

Publisher Information