UKREiiF 2026: Built on borrowed ground: Are we running out of the raw materials for tomorrow?

From large scale regeneration to infrastructure and housing delivery, the sector is mobilising at pace to meet ambitious targets, reduce carbon, embrace innovation and rethink how places are designed and delivered.

Yet beneath this progress lies an often underexamined constraint: understanding the local availability of the raw aggregate materials that make development possible in the first place. In the UK, the long-term security of these resources is becoming increasingly uncertain. Declining replenishment rates, competing land use priorities and complex planning pathways are placing pressure on supply when demand is only set to increase.

While the Government's Vision 2035: Critical Minerals Strategy has helped to clarify the UK’s approach to critical minerals, including rare earth elements, the Aggregate Minerals Survey for Great Britain (2023) highlights a more immediate challenge around traditional aggregates. It shows that replenishment rates continue to lag behind extraction in several key regions, reinforcing concerns about the long-term security of supply. While these materials may not be classed as critical we cannot deny that they are essential.

This is not simply a question of geology, but of policy, planning and perception. Safeguarding resources, securing permissions and aligning extraction with wider development goals remain persistent challenges.

Unlocking local reserves through better alignment

Too often, mineral resources are considered in isolation from the development they ultimately support. This disconnect can lead to sterilisation of valuable building material resources, missed opportunities for co-location and unnecessary reliance on imported materials.

Yet within this challenge sits a clear opportunity. Mineral Safeguarding Areas (MSAs) and Mineral Consultation Areas (MCAs), often viewed primarily as a constraint on development, can instead play a proactive role in shaping it. By recognising these areas early, developers and landholders can work collaboratively with local mineral operators to unlock resources, avoid sterilisation and integrate phased extraction into the early stages of masterplanning.

This approach not only helps secure future supply, but can also enable more efficient land use, support site viability and create the conditions for more circular, long-term development strategies. It can also unlock early-stage revenue, with the potential for income from mineral extraction helping to build a financial foundation before construction begins.

For developers and landholders, this means thinking beyond immediate site boundaries and considering the wider resource landscape. For planners and policymakers, it means enabling frameworks that support long-term, joined-up decision making.

A typical new build house in the UK requires on average of 200 tonnes of aggregates and associated mineral products. By aligning land use and resource planning more effectively, there is potential not only to secure supply, but also to reduce transport emissions, support local economies and create more resilient development pipelines.

Scaling secondary and low carbon materials

Alongside primary resource supply, the sector is increasingly looking to secondary and low carbon materials as part of the solution. Revisions to Policy M3: Assessing the benefits of mineral development in the National Planning Policy Framework (NPPF) are a positive step to ensure that the benefits of processing secondary aggregates from waste materials as an alternative to primary materials are considered in decision making.

Recycled aggregates, construction and demolition waste and innovative material technologies all have a role to play in reducing reliance on virgin extraction. Progress is already being made, but significant barriers remain. Questions around quality, consistency, cost and scalability continue to influence adoption. There is also a need for clearer standards, greater confidence across the supply chain and stronger incentives to drive uptake from niche applications to mainstream adoption.

While this fundamentally involves rethinking how materials are sourced, used and valued within the development process, secondary materials won’t completely replace raw materials, so we still need to consider both as important.

Diversifying to a more sustainable resource model

The current conversation around net zero rightly focuses on operational carbon, energy efficiency and the decarbonisation of construction processes. However, the material inputs themselves are equally significant. The extraction, processing and transport of raw materials contribute substantially to embodied carbon, while their availability directly shapes the pace and viability of development.

Perhaps the most important shift required is a move away from a purely linear, extractive model toward a more circular and diversified approach to resource provision.

In a circular system, materials are not treated as disposable inputs but as assets that retain value over time. This means designing buildings for disassembly - prioritising reuse and recovery - and creating systems that enable materials to flow efficiently between projects and sectors.

Diversification is equally important. Relying on a narrow set of materials or supply sources increases vulnerability to disruption. Expanding the range of materials used, investing in innovation and building more flexible supply chains will be key to enhancing resilience.

This transition will not happen overnight. It requires collaboration across the entire value chain and a shift in mindset that recognises that resource strategy is not a peripheral issue but a central component of sustainable development.

A strategic issue for the future of development

Raw material availability is not just a technical or operational concern but a strategic issue that goes to the heart of how the built environment evolves over the coming decades.

Decisions made today about land use, resource management and investment priorities will have long lasting implications. Failing to address the replenishment challenge risks creating bottlenecks that will slow delivery, increase costs and undermine sustainability goals.

By engaging with this issue now, the industry can move beyond reactive solutions and begin to shape a more coherent and forward-looking resource strategy that considers what a good site might look like from a resource utilisation and geological perspective in the long-term.