The UK construction sector is at a crossroads. It generates more than 60 per cent of national waste and is responsible for half of all raw material extraction, making it the country’s single biggest contributor to our throwaway economy. At the same time, government plans to deliver 1.5 million new homes risk driving a surge in carbon-intensive building. Unless we change course, we will overshoot our legally binding carbon budget while squandering existing resources.
What’s the alternative? Circularity. A circular economy is one in which products, buildings and materials are kept at their highest value for as long as possible through prioritising the reuse hierarchy: retain, refurbish, reuse, remanufacture, recycle. The aim is simple but radical: eliminate waste, regenerate nature and decouple prosperity from ever-growing resource use.
The problem is that current policy and market incentives still reward the extractive ‘take-make-waste’ model. Embodied carbon remains unregulated. When the government does talk about circularity, it’s too often reduced to tinkering at the edges (recycling materials, tweaking supply chains), rather than grasping the bigger prize: rethinking cities and infrastructure by reusing the buildings and resources already on our doorstep.
The piecemeal approach also fails to recognise the complexity of the construction industry itself – the way we assemble products on site, such as using adhesives and wet trades, often creates the biggest obstacles to reuse. This kind of narrow framing is like obsessing over tethered bottle lids while ignoring the wider waste crisis. What we need instead is a systemic shift: a fundamental revaluation of materials and how we use them.
The scale of the opportunity is enormous. London alone could retain up to 13.8 million tonnes of materials over the next decade, saving around 3.6 per cent of the UK’s total greenhouse gas emissions. According to Mace Group, that’s equivalent to £1.25 billion in value. For context, the UK produces enough construction waste every year to fill the River Thames from Imperial Wharf to the Thames Barrier.
Across the country, hundreds of thousands of buildings stand empty and towns and high streets are in decline through neglect. Reuse and retrofit could meet housing demand, revive local economies and create new jobs, all without the carbon cost of demolition and new construction.
Circularity is not a constraint; it is an opportunity. A circular economy in the built environment could unlock growth through efficiency and innovation, generating green skills across the country, and strengthening resource security at a time of fragile global supply chains and geopolitical uncertainty.
The Building Blocks Manifesto, launched in Parliament by UK Architects Declare last year argued for this shift. Examples are now multiplying: the Romulus project has demonstrated that large-scale material reuse is feasible; take-back schemes by suppliers like Saint-Gobain are proving new business models; and Rotor, the Brussels-based design collective, has pioneered reuse at scale by salvaging and redistributing building materials across Europe.
Campaigns like the AJ’s RetroFirst and now Don’t Waste Buildings have helped bring these ideas into the mainstream in the UK, but they need to be matched with policy frameworks that make reuse the default rather than the exception.
Momentum is real, but so are the barriers. Findings from Architects Declare’s Circularity Catalyst event earlier this year highlighted the need for procurement reform, tax incentives, and clear risk frameworks for material reuse to scale. This is why the work of the government’s Circular Economy Taskforce is so significant. Its forthcoming ten-year strategy is a rare opportunity to embed upstream solutions into national policy, by incentivising reuse of buildings and infrastructure, and adopting a systemic approach to material reuse, in addition to recycling products and materials downstream and ensuring new construction enables future reuse. If it misses this chance, the UK risks another decade of half-measures.
‘Without regulation, tax and financial incentives and appropriate planning frameworks, progress will remain patchy’
Industry leadership and government intervention must now move together. Architects, engineers, clients and the entire construction sector are ready to act but, without regulation, tax and financial incentives and appropriate planning frameworks, progress will remain patchy. The scale of the crisis demands systemic change.
On 14 October, Architects Declare will host A Circular Revolution: an event designed to galvanise industry movement. The evening will begin on the London Eye, followed by inspiring talks at Sustainable Ventures featuring Paul Ekins (Deputy Chair of the Government Circular Economy Task Force), circularity champion Duncan Baker-Brown, Don’t Waste Buildings, and representatives from event sponsors Mace, Marks Barfield, Lazari, and Structure Tone.
At the event we will launch our Call-to-Action paper, setting out both the top-down policy asks for government and the bottom-up pledges the sector can make today. We are inviting practitioners, policymakers, and campaigners to add their voice, shape these asks, and make their own pledge.
The message is clear: the built environment is not waiting for permission – it is ready to lead.
Circularity will become the new normal, but the rapid transition we need requires the support of government.
Zoe Watson is a UK Architects Declare Trustee
