Welsh Government open consultation on plans to amend Building Regulations Part L, F and O

The Welsh Government are asking for views on their plans to improve energy efficiency standards in new and existing buildings across the nation.

The Building Regulations department have opened a consultation on changes to Building Regulations Part L (conservation of fuel and power), which will also impact Part F (Ventilation), Part O (Overheating) and associated Approved Document guidance.

You can take part in the survey by completing it online, by downloading the response form and emailing it back to the Building Regulations department, or by post.

Access further details, and participate in the survey, by visiting the Welsh Government’s website here.

The consultation closes on 17 November 2025.