Here are the climate-related sections of speeches by MPs during the Commons debate Embodied Carbon: Buildings.
22:32 Ellie Chowns (Green)
The climate crisis is upon us. We in the UK are now in the midst of our third heatwave in less than three months. Communities have endured sweltering conditions that have put huge pressure on our NHS, our infrastructure and our natural environment. Our ambulance service has never been so busy. Tragically, lives have been lost as people have sought relief from the heat in rivers and lakes. Today, we have heard that it is estimated that there were 2,700 excess deaths due to just the May and June heatwaves. In my constituency, dozens of schools have had to close due to overheating. People are sweltering in hospitals, care homes and many other workplaces, and farmers and communities alike are facing critical water shortages.
Extreme heat is no longer an occasional inconvenience, and neither are extreme storms and floods; they are now part of everyday life, and we know that things are getting worse. If we are serious about protecting future generations from climate breakdown, every sector must play its part in reducing emissions. Today I will focus on one sector that is rarely discussed, despite having an environmental footprint unlike any other.
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22:38 Ellie Chowns (Green)
It is clear that the construction industry has a huge impact on both climate change and biodiversity loss. We rightly spend time discussing how efficiently buildings operate once they are occupied, but we spend remarkably little time discussing the emissions that occur before anybody even walks through the front door of a new building. Those emissions are known as embodied carbon—that is, the greenhouse gases emitted when we extract raw materials, process them into building materials and use them for construction.
According to the UK Green Building Council, embodied carbon accounts for around 20% of the UK’s total greenhouse gas emissions and is expected to account for fully half of the built environment’s emissions by 2035. Bizarrely, though, it has so far been ignored by central Government policy. Building regulations only set limits on a subset of operational emissions. The Government’s new future homes standard ignores embodied carbon and only tackles energy use in new homes, which is a small fraction of the total emissions from the built environment. The standard is silent on material use, construction processes and embodied carbon. These are not marginal omissions—they are large gaps in UK climate policy. The Environmental Audit Committee pointed this out several years ago, as have experts for years and years.
I commend those councils for their ambition—they recognise the urgency of climate action and are taking real, tangible action. However, the consequence is fragmentation. Different authorities are adopting different reporting templates, different thresholds, different assessment requirements and different policy wording. As such, national house builders and developers are being forced to navigate an increasingly complex patchwork of local rules. They have to learn a new set of rules every time they build in a different local authority. Planning officials are duplicating work, and local authorities are developing parallel systems. Everyone is investing time and money in solving the same problem dozens of times over. The Government would not leave local authorities to tackle other aspects that are fundamental to building design, such as fire safety or equality. Those areas have national minimum standards that authorities can build on, so why are carbon emissions not treated the same? Do we not take climate breakdown as seriously as safety or equality?
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22:40 Ellie Chowns (Green)
As the Environmental Audit Committee highlighted in its 2022 report, “Building to net zero: costing carbon in construction”, regulating embodied carbon would be
The encouraging news is that the construction sector is not waiting for Government. For more than four years, more than 250 organisations from across the built environment sector have supported a campaign called “Part Z”, named after the various other parts of the building regulations. They have been calling for national embodied carbon regulation. Those companies are not asking the Government to invent something entirely new. Indeed, the same experts who developed “Part Z” have now produced the UK net zero carbon buildings standard, a ready-made framework that provides a practical route to compliance. It builds on the Royal Institution of Chartered Surveyors’ whole-life carbon assessment methodology, one of the most developed embodied carbon methodologies in the world. These documents could form the basis of future regulatory reporting requirements and, in time, a new approved document. The Government do not need to start from scratch; the construction industry has already done much of the hard work.
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22:39 Ellie Chowns (Green)
Today, I ask the Minister for one thing above all else: national leadership. I ask for a clear pathway towards national regulation to measure and reduce embodied carbon, aligned with the direction already being taken by many of our international partners and by many in the construction industry. I ask that embodied carbon is finally recognised within national planning policy, replacing today’s fragmented patchwork with one coherent national approach. I ask the Government to consider using the UK net zero carbon buildings standard as the route to fast-tracking the compliance requirements, finally giving industry the certainty it has been requesting for years. When will the Government finally release their long-delayed circular economy growth plan, which could deal with embodied carbon at its core?
Climate change is not hanging around, as we can see around us all the time, and embodied carbon is only making things worse. We can and must change that. We have the expertise, the methodology and the support from industry. Local authorities are crying out for consistency, and the standards have already been written—the only thing missing is national leadership. I call on the Minister to provide it.
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22:44 Samantha Dixon (Labour)
I should make it clear at the outset that the Government agree that action on embodied carbon in new buildings is important. If we are to meet our net zero targets, we cannot just look at energy use in occupation. We recently introduced the future homes and buildings standards, which will ensure that new buildings become zero carbon in operation once the electricity grid has decarbonised. However, we also need to understand the embodied carbon associated with materials, construction, maintenance, replacement and end-of-life treatment. As operational emissions fall, embodied carbon will become an increasingly important part of a building’s whole-life emissions.
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22:48 Samantha Dixon (Labour)
What I will say is that despite those challenges, the Government recognise the excellent leadership already being shown by parts of the sector—which the hon. Member has described—in tackling embodied carbon. Parts of the construction supply chain are already working to measure and reduce whole-life carbon, and we saw that momentum at the conference at the end of last year that the hon. Member mentioned earlier. It was attended by officials from the Ministry of Housing, Communities and Local Government and the Department for Energy Security and Net Zero, as well as the hon. Member, alongside industry and professional bodies. That summit highlighted both the appetite for action and the importance of consistency, better data infrastructure, and a phased approach to give industry appropriate time to adapt.
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Samantha Dixon (Labour)
However, reducing embodied carbon is not just about regulation or planning; product innovation, digital tools, professional training, voluntary disclosure and better design practice will all have a role. The Department for Energy Security and Net Zero is already taking forward work to grow the market for low-carbon industrial products, with an initial focus on steel, cement and concrete. It has committed to developing guidance for buyers and producers of construction products on embodied emissions reporting, product classifications and green procurement approaches. This guidance will help buyers to identify and compare lower-carbon products, and help producers to market them. That matters for buildings, because the choices made by designers depend on the products available to them and on information that they can trust. Better product-level carbon data can support better building-level decisions, but the two systems need to be aligned carefully rather than developed in isolation.
The materials we use in buildings must be assessed in the round. Lower-carbon products offer real opportunities, but they must also be safe, durable, suitable for their intended use and supported by reliable information. The Government’s work on construction products reform and DESNZ’s work on low-carbon industrial products therefore point in the same direction, and are being developed to work together, with better information, greater confidence and a market capable of supporting both safety and decarbonisation.
Let me be clear about what the Government are not saying. We are not saying that embodied carbon is too difficult to address, we are not saying the Government will have no role to play, and we are not saying complexity is a reason to put this issue in the “too hard” box. However, we are saying that complexity matters; unintended consequences matter; burdens on industry, local authorities and consumers matter; housing delivery and building safety matter; and net zero matters. The right policy must hold these objectives together.
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