The new Approved Document Part O, which aims to mitigate overheating in new residential buildings, will apply to all projects where building notice or full plans have not been submitted to a local authority before 15th June 2022 and will apply to all projects regardless from June 15th 2023.

Join the Good Homes Alliance and Susie Diamond, Inkling LLP, to take a critical look into the new Approved Document Part O: Overheating.

The Future Homes Hub have commissioned the GHA to write an accompanying user guide to Approved Document Part O: Overheating, ready for June 15th when the regulation goes live in England. At the forefront of knowledge on the regulation, Susie makes up part of the expert authoring team for this much needed guide, alongside Julie Godefroy and Richard Partington. Susie also co-authored the GHA overheating tool and guidance for new homes and is working on the GHA overheating tool and guidance for retrofit, which is currently in beta version, available to download here.

Find out more about the user guide, the implications of Part O and its impact on the future of new build housing.


  • 12:00 Welcome from the GHA – Julian Brooks, Good Homes Alliance
  • 12:05 Part O, impact and implication – Susie Diamond, Inkling LLP
  • 12:40 Q&A
  • 13:00 Close

Key information

  • Dates: Tuesday 28th June 2022
  • Time: 12:00-13:00
  • Location: Online (Zoom)


  • Free-to-attend for GHA members
  • £20 for members of GHA partner organisations*
  • £30 for non-members

*Partner organisations include: AECB, Building Performance Network, Passivhaus Trust, SuperHomes, STBA, TCPA, The Green Register, The Alliance for Sustainable Building Products, UKIEG, Woodknowledge Wales.

More about the Bitesize Webinar Series

New for 2022! – A series of bitesize webinars with industry leaders from within the GHA network, looking at the future outlook for a range of sustainability issues and low carbon solutions, including building performance, ventilation, heat pumps, overheating, airtightness and more.

GHA Bitesize Webinar Series – impact and implications – Approved Document Part O: Overheating

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