Planning and Infrastructure Bill

Debate between Lord Wilson of Sedgefield and Lord Krebs

Committee stage
Tuesday 9th September 2025 Lords Chamber

[Lord Wilson of Sedgefield (Lab)]

Climate change mitigation does play a big part in all the planning arrangements that we are going to introduce. It is one of the central points of the Planning and Infrastructure Bill that we actually take those aspects into consideration.

I turn to Amendment 145B. It is vital that new homes are energy efficient and designed to mitigate the risk associated with overheating and spatial development strategies, particularly as climate change increases the frequency and severity of extreme heat events. The Planning and Compulsory Purchase Act already allows strategic planning authorities to include policies requiring housing to meet standards on energy efficiency and climate resilience in their spatial development strategies, provided they are of strategic importance to the strategy area. As I mentioned previously, the spatial development strategies are intended to be high-level documents. Energy-efficiency and climate resilience standards are more detailed matters that are better suited to a local plan.

We intend to go further this autumn. We will set more ambitious energy-efficiency and carbon-emission requirements for new homes through the future homes and building standards. These standards will set new homes on a path that moves away from reliance on volatile fossil fuels. Homes built to these standards will use sustainable energy sources for their heating and hot water. This means they will be zero-carbon ready and will need no future work to achieve zero-carbon emissions when the electricity grid is fully decarbonised.

I thank the noble Baroness, Lady Bennett, for proposing Amendment 180, which would require the submission of embodied carbon assessments for developments of a specified size as part of planning applications. However, to reiterate a point I have made throughout the debate, the National Planning Policy Framework already makes it clear that the planning system must support the transition to a low-carbon future. It calls for a proactive approach to both mitigating and adapting to climate change, in line with the long-term goals set out in the Climate Change Act 2008.

In our consultation on changes to the framework last summer, we sought views on whether carbon could be reliably measured and accounted for in plan-making and decision-making. We wanted to understand the sector’s readiness and to identify any practical barriers to the wider use of carbon assessments in planning. The feedback we received was wide-ranging and constructive. Having carefully considered those views, we concluded that it would not be appropriate at this stage to introduce a mandatory requirement for carbon assessments, given the current state of evolution of assessment techniques and the need to consider very carefully the impact on applicants where additional information such as this is mandated.

However, we recognise the need for greater clarity and guidance. That is why we have committed to updating the planning practice guidance to help both decision-makers and developers make better use of available tools to reduce embodied and operational carbon in the built environment. We also acknowledge that embodied carbon is not just a challenge for buildings; it is a systemic issue across the construction and supply sector. As wider decarbonisation efforts take hold and industries evolve, we expect to see a natural reduction in the embodied carbon of buildings over time. For these reasons, I kindly ask the noble Baroness to withdraw her amendment.

[Lord Krebs (CB)]

My Lords, may I ask a small question? With regard to overheating, which was so eloquently introduced by the noble Baroness, Lady Bennett of Manor Castle, do the Government have any measurement of what proportion of houses that are being built now, as we speak, have within them measures to prevent overheating? Further, when all this new guidance that we have heard about comes into place, what proportion of homes will, in the future, from now onwards, incorporate measures to protect against overheating?

[Lord Wilson of Sedgefield (Lab)]

To the first part of the noble Lord’s question, there has been an energy follow-up survey, which said that energy-efficiency measures that have been taken over recent years have not significantly increased the risk of overheating. On his second point, I will write to the noble Lord and give him the specific answer to his question.