Architecture Public knowledge base

Reviewed 25.10.2026England focus

Jasmine Gokmen
In forceAcoustics & Access

Approved Document E: Resistance to sound

Airborne and impact sound between dwellings

Sets performance standards for sound insulation between dwellings and rooms for residential purposes, and for reverberation in common areas.

Also known as: AD E, Approved Document E

Jurisdiction
England
Document type
Statutory guidance
Edition
2015 edition
Source updated
4 March 2015
Applies from
—
Topic
Acoustics & Access

Key requirements

  • New-build separating walls and floors: airborne DnT,w + Ctr of at least 45 dB.
  • New-build impact sound: LnT,w of no more than 62 dB.
  • Internal walls and floors have separate performance limits.
  • Reverberation control applies to common areas and to schools.
  • Compliance can be shown through pre-completion testing or accredited construction details.

Performance at a glance

Airborne (new-build)
DnT,w + Ctr ≥ 45 dB
Impact (new-build)
LnT,w ≤ 62 dB

Applies to

Dwellings, rooms for residential purposes and schools in England.

Official source

GOV.UK — Approved Document E

Open official source

Related records

BS 8233 · Sound insulation and noise reduction for buildingsPart M · Access to and use of buildingsPart K · Protection from falling, collision and impact

Reviewed 25 October 2026. This summary is an editorial reference, not legal advice. Check the current official text and confirm the approach with building control before relying on it. Browse all 35 records.