Shallow Geothermal Heat Networks: Lessons Learnt from Global Case Studies

This Premium Content White Paper provides a structured analysis of international case studies demonstrating the technical and economic viability of shallow (<500 m) geothermal heat networks at larger scales. It synthesizes evidence from diverse urban and suburban deployments across the last two decades to distil key lessons, outcomes, and models relevant to stakeholders aiming to accelerate low-carbon heating in the UK and Ireland.

By comparing technologies, business models, emissions outcomes, and delivery strategies, the report offers a cross-cutting perspective on how geothermal systems are being successfully implemented worldwide—identifying transferable insights for policy-makers, developers, utilities, and local authorities. It highlights that shallow geothermal is not a niche technology, but a scalable, infrastructure-grade solution for heat decarbonization, particularly in areas where fossil fuel phase-out, fuel poverty, and energy resilience intersect.

In doing so, the report contributes to the growing body of evidence needed to mainstream shallow geothermal within regional climate strategies and to inform the design of policies, incentives, and planning tools that support wider deployment across the built environment.