Overheating: Approved Document O
Building regulation in England setting standards for overheating in new residential buildings.
Applies to England
Documents
Details
Since April 2023, the Building Safety Regulator has a duty under the Building Safety Act 2022 to keep under review the safety and standards of all buildings in England, which includes advising government on updates to the Approved Documents.
This Approved Document covers the overheating mitigation requirements of the building regulations as set out in Part O of Schedule 1 to the Building Regulations and in a number of specific building regulations. Technical guidance is contained in Approved Document O. Approved Document O applies to new residential buildings.
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Updates to this page
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Added Approved Document O frequently asked questions.
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Republished with corrections which can be found in Circular 01/2022 - https://www.gov.uk/government/publications/building-regulations-in-england-circular-012022 Minor misprints have been corrected.
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First published.