Heat networks brought into line as new UK-wide rules take effect

Heat networks, long seen as a key but under-regulated part of the UK’s low-carbon future, are now subject to a comprehensive new regulatory regime that will have direct implications for businesses, developers and consumers across Scotland and the wider UK.

From January this year, the sector has formally come under the oversight of Ofgem, using powers created by the Energy Act 2023 and implemented through the Heat Networks (Market Framework) Regulations 2025.

The move marks a decisive shift for an industry that, until now, has largely been governed by private contracts rather than public regulation.

Why reform was needed

Heat networks (systems that distribute heat from a central source to multiple buildings) have been promoted as a vital tool in cutting emissions, particularly in urban areas where alternatives such as individual heat pumps are less practical.

However, their growth has been accompanied by persistent concerns over pricing transparency, service standards and limited routes for consumer redress. The new framework is designed to address these concerns head-on.

Under the legislation, operators of heat networks must now be authorised by Ofgem. Existing schemes are being brought into the regime through transitional “deemed authorisation”, but by early 2027 all operators will be required to fully comply.

Operating a district or communal heat network without being granted authorisation from Ofgem is now a criminal offence.

Regulatory standards and consumer protection

The conditions cover a wide range of operational and governance requirements, including financial resilience, reporting obligations and customer service standards.

Consumer protection sits at the heart of the reforms. Customers must now receive clearer billing information, and they benefit from new rules designed to ensure pricing is fair and proportionate. There are also limits on back-billing and formal standards governing service performance.

Crucially, the regime introduces access to independent redress, with disputes able to be escalated beyond the operator. This is a significant change for consumers who have historically had limited options when issues arise.

Enforcement

Ofgem has also been granted enforcement powers, including the ability to investigate operators, impose financial penalties and require compensation to be paid where standards are not met. This brings heat networks into line with other regulated parts of the energy system.

The legislation also provides for the introduction of minimum technical standards, aimed at improving the efficiency and reliability of networks. These standards, which are being developed through the Heat Network Technical Assurance Scheme, will be enforceable by the regulator and are expected to influence both the design and operation of future projects.

Heat network zoning

Another significant development is the introduction of heat network zoning. The new rules allow for areas to be designated as particularly suitable for heat networks, with local authorities playing a central role in identifying such zones. In practice, this could mean that new developments in designated areas are required, or strongly encouraged, to connect to a network. Zone developers will be subject to a consenting framework which gives them exclusive development while holding them accountable for delivery.

For developers and investors, zoning may provide greater certainty around demand, supporting the business case for large-scale infrastructure projects. It also signals a move towards a more planned and coordinated approach to heat decarbonisation.

Heat Networks (Scotland) Act 2021

In Scotland, the picture is further shaped by the Heat Networks (Scotland) Act 2021, which sits alongside the new GB-wide regime. The Scottish legislation introduces additional elements, including a proposed licensing system for operators, requirements for project consents and a more developed approach to zoning.

The result is a layered regulatory environment. While Ofgem’s role and the core consumer protection framework apply across Great Britain, Scottish projects may also need to comply with devolved requirements as these are brought fully into force.

Implications for businesses

For businesses, the changes are likely to be felt across several fronts. Developers will need to ensure that new schemes are designed with compliance in mind from the outset, while operators will face increased scrutiny and potential enforcement action if standards are not met. Additionally, customers, both commercial and domestic, should see improved transparency and accountability in how heat is supplied and priced.

At the same time, the reforms are expected to support growth in the sector by providing a clearer and more stable framework for investment. Heat networks have long been identified as a key component of the UK’s net zero strategy, and the introduction of formal regulation is seen as a necessary step in unlocking their full potential.

There remain questions about how the regime will operate in practice, particularly around pricing and the pace at which zoning will be implemented, but the direction of travel is clear.

Heat networks are being brought firmly into the mainstream of the UK’s energy system where they will be regulated and scrutinised, but also positioned as a central part of the transition to low-carbon heat.

How we can help

If you have any questions relating to any of the areas discussed in this article, please contact Martin Whiteford or a member of our specialist team.