Heat Networks Regulation: What it means in practice

The Heat Networks (Market Framework) Regulations 2025 mark a fundamental shift: heat networks are moving from largely unregulated infrastructure to fully regulated utility assets. For developers, local authorities and investors, this is not just a compliance exercise – it is reshaping how projects are structured, financed and operated.

While existing operators benefit from a transitional “deemed authorisation”, full compliance with the new framework is expected by January 2028. The HNA general conditions set out how that regulation works in practice, imposing obligations across governance, consumer protection, operational performance and financial resilience.

A shift from infrastructure to regulated asset

This shift has immediate implications for developers, funds, Energy Service Company’s (ESCo’s) and public sector sponsors.

The most important development is not the detail of the regulations themselves, but what they represent. Heat networks are now regulated infrastructure assets, with enforceable standards around pricing, service delivery and consumer outcomes.

For developers and investors, this changes how projects are approached. Regulatory compliance is no longer a downstream operational issue – it is central to structuring, delivery and bankability. Early decisions on who acts as operator and/or supplier, and how those roles are allocated across a project, now carry direct regulatory consequences.

Implications for delivery models

The new regime requires stakeholders to take a more structured approach to delivery.

In particular:

• Projects must clearly identify which entity holds the relevant authorisation
• Delivery models (including ESCo or concession arrangements) must allocate compliance responsibility and risk appropriately
• Funders are increasingly focused on whether regulatory obligations are properly reflected in the project structure

For operators, the challenge is equally significant. Moving from an unregulated environment to one governed by detailed authorisation conditions requires a step change in systems, processes and governance – typically starting with a gap analysis against the HNA conditions and a programme of implementation.

Contractual impact

One of the most immediate implications of the new regime is contractual. Many existing arrangements – including heat supply agreements, connection agreements and operational contracts – were not designed with regulated obligations in mind.

As a result, stakeholders are now reviewing and updating documentation to:

• Align with HNA requirements (particularly around consumer-facing terms)
• Allocate regulatory compliance risk and associated cost
• Provide for information sharing, audit and cooperation with the regulator
• Ensure appropriate step-in and continuity mechanisms are in place

This “re-papering” exercise is likely to be a key focus as the sector moves towards the 2028 compliance deadline.

The new regulations are far-reaching.  Now is the time to consider how you may be affected and whether you need to do things differently in future.

Looking ahead

The introduction of the Market Framework Regulations and HNA general conditions changes the lens through which heat networks must be viewed. Regulation is now a core component of project design, not an afterthought.

Stakeholders should be taking steps now to ensure that both their project structures and contractual frameworks are aligned with the new regime. Those that do so early will be better placed to deliver compliant, investable and future-proof heat network schemes.

Service lines and solutions

We are already supporting clients with gap analysis, delivery model structuring and contract updates. If you are reviewing a project or existing network we can help, please do get in touch with Charles Robson or Antonia Venning.