Do Ofgem's heat network rules apply in Northern Ireland?

No. The Ofgem authorisation framework created by the Heat Networks (Market Framework) Regulations 2025 applies in Great Britain only. Northern Ireland is developing its own separate framework, and the Department for the Economy consulted on proposals for it in August 2026. Operators in Northern Ireland are not required to register with Ofgem or comply with Ofgem authorisation conditions.

Who will regulate heat networks in Northern Ireland?

The Department for the Economy proposes that the Utility Regulator will be the heat network regulator in Northern Ireland, using powers under section 217 of the Energy Act 2023. The Consumer Council for Northern Ireland is proposed as the independent consumer advocate for heat network customers, in line with its role in gas and electricity.

Are the Heat Network (Metering and Billing) Regulations 2014 still in force in Northern Ireland?

Yes. The 2014 regulations were replaced in Great Britain in January 2026, but they remain in place in Northern Ireland on an interim basis while a local framework is developed. They are expected to be revoked in 2027. Northern Ireland operators still have live notification, metering and billing obligations under them until that happens.

What is deemed authorisation for Northern Ireland heat networks?

The consultation proposes that heat networks already notified under the current metering and billing regulations would be granted authorisation automatically when the new regime commences, rather than having to apply. Operators would then confirm key information to the Utility Regulator during a transition period. Networks that were never notified would not be covered by this route.

How many heat networks are there in Northern Ireland?

According to the consultation, 97 heat networks are notified under the current metering and billing regulations in Northern Ireland: 90 communal systems and 7 district heating networks, serving around 3,000 consumers. Belfast has the largest share with 25 networks.

When will heat network regulation start in Northern Ireland?

No date is fixed. The consultation is open for responses until 1 October 2026. The Department intends to bring forward secondary legislation, the Heat Networks Operational Regulations, before the end of the current Assembly mandate, subject to the affirmative resolution process and Assembly timetabling. Commencement and any transition period would follow.

Heat network regulation in Northern Ireland: the 2026 proposals

Key points

Ofgem does not regulate heat networks in Northern Ireland – the Utility Regulator is proposed as the regulator instead
The Heat Network (Metering and Billing) Regulations 2014 are still in force in Northern Ireland and remain enforceable until they are revoked, expected in 2027
An authorisation regime is proposed, with deemed authorisation for networks already notified under the 2014 regulations
The Department for the Economy consultation is open until 1 October 2026

Operators with networks on both sides of the Irish Sea have spent the last two years preparing for Ofgem authorisation. None of that applies in Northern Ireland. The Heat Networks (Market Framework) Regulations 2025 and the Ofgem authorisation conditions that sit under them are Great Britain measures, and Northern Ireland was carved out of them from the start.

That gap is now being filled. On 6 August 2026 the Department for the Economy published proposals for a Northern Ireland heat network framework, with the Utility Regulator as regulator and an authorisation regime for operators. This guide sets out what is proposed, which networks it would cover, and the obligations that already apply in the meantime.

Belfast City Hall and the city centre skyline, where 25 of Northern Ireland's notified heat networks are located

Why Northern Ireland is on a different track

Until January 2026 the Heat Network (Metering and Billing) Regulations 2014 applied across the whole United Kingdom. They set a baseline covering meter installation and the information that has to appear on a bill, and they required operators to notify their networks to a central database. In Great Britain those rules were replaced by the new Ofgem framework. In Northern Ireland they were left in place while the Department developed a local approach.

The 2014 regulations are expected to be revoked in 2027. If nothing replaces them, heat network consumers in Northern Ireland would be left with no regulatory protection at all, which is the immediate reason for the consultation. The legal basis for a local framework already exists: the Energy Act 2023 gives the Department the powers to create one, and section 217 of that Act already designates the Utility Regulator as the heat network regulator for Northern Ireland.

The market is small. The consultation records 97 heat networks notified in Northern Ireland, made up of 90 communal systems and 7 district heating networks, serving roughly 3,000 consumers. Belfast accounts for 25 of them, with Causeway Coast and Glens and Derry City and Strabane on 12 each. That scale shapes the whole approach: the Department has been explicit that the first phase should be proportionate to a developing market rather than an attempt to replicate the Great Britain regime in full.

What is being proposed

The first phase covers three things. The Utility Regulator would be given the objective and legal powers to act as heat network regulator, with the principal objective of protecting the interests of existing and future heat network consumers. An authorisation regime would be introduced for operators. And the metering and billing protections in the 2014 regulations would be carried across so that nothing lapses when those regulations are revoked.

The Consumer Council for Northern Ireland is proposed as the independent consumer advocate, mirroring the role it already plays in gas and electricity. That is a meaningful structural difference from Great Britain, where consumers escalate to the Energy Ombudsman.

The regulations themselves would be called the Heat Networks Operational Regulations. Authorisation conditions under them are expected to cover registration, certification, metering, billing, provision of information to the Utility Regulator, periodic reporting, and co-operation with the Regulator, the Consumer Council and consumers in resolving complaints.

Which networks would be in scope

The rules would apply to networks supplying heat to more than one premises, whether that is several buildings or several self-contained flats within one building. The definition comes from the Energy Act 2023 and is broadly what operators already work to.

Exemptions would follow the existing exempt classes under the 2014 regulations. That covers certain communal arrangements within a single building where heat is not supplied to separate self-contained premises, along with particular categories of existing buildings such as some supported and specialist accommodation. If a network is outside scope today, the proposal is that it stays outside scope.

How authorisation would work

The Department has chosen authorisation rather than licensing, and the distinction matters for the administrative load on operators. Under an authorisation model, an operator may carry out the regulated activity provided it meets a defined set of general conditions. There is no individual approval decision for each network. Licensing would require case-by-case approval, and the Department judged that disproportionate for a market this size.

For networks already notified under the 2014 regulations, the proposal is deemed authorisation. Those operators would be authorised automatically at commencement rather than having to apply, and would then confirm key information to the Utility Regulator during a defined transition period. New entrants arriving after commencement would have to apply for authorisation before carrying out any regulated activity.

Deemed authorisation depends on being on the register. The automatic route is described as applying to networks already registered under the 2014 regulations. An operator who never notified a network has nothing to be carried across, and would be looking at the new entrant route instead. If you are unsure whether a network was ever notified, that is worth establishing now rather than during a transition period with a deadline attached.

Heat meter and pipework in a plant room, the metering arrangements covered by Northern Ireland heat network regulation

Metering and billing

This is the part of the framework that already exists and would carry forward largely unchanged. The proposal is to retain the current requirements covering when heat meters must be installed and how they are maintained, what information a bill must contain so that a customer can understand the charge, and the limited cases where alternative arrangements apply because metering or frequent billing is not practical.

The underlying principle is that bills should rest on measured consumption rather than estimates. The Department has signalled that broader transparency measures, including pricing comparison and mandatory tariff disclosure, are for a later phase rather than this one.

For operators, the practical reading is that metering and billing obligations do not pause between now and commencement. They apply today under the 2014 regulations and they are proposed to apply after them under the new conditions. There is no window in which they lapse.

Complaints

The Department has been open that the Utility Regulator's role here needs more work, and has put forward an illustrative three-step route rather than a settled position. A consumer would raise the issue with the operator first. If it is not resolved, they could go to the Consumer Council for support and advocacy. Only where the matter concerns compliance with the authorisation rules, and cannot be resolved through the Consumer Council, would it reach the Utility Regulator.

Whatever route is settled on, operators would be required to maintain a clear and accessible complaints process, to tell customers how to complain and how the complaint will be handled, and to engage constructively with the Consumer Council and the Regulator in resolving them. The Department is also weighing a formal Code of Conduct, developed with the Consumer Council and the Utility Regulator, that would sit as an authorisation condition covering customer engagement, communications and complaints handling.

A public register

The Utility Regulator would keep a public register of heat networks in Northern Ireland, so that residents, landlords and managing agents can see what networks exist and who runs them. The consultation asks what information that register should hold, which is one of the more open questions in the document and one where operators have a direct interest in the answer.

What is deliberately not in this phase

The consultation sets out a long list of areas held back for later consideration, and it is worth knowing what is on it. Standards of conduct, fair pricing principles, heat price transparency and benchmarking, cost allocation between standing and variable charges, step-in arrangements for failed networks, protections for consumers in vulnerable circumstances, smart metering, pre-transaction information for buyers and tenants, and protections for tenants who are not the bill payer are all named as future work rather than first-phase requirements.

Technical standards sit in the same category. The Department has raised the possibility of Northern Ireland drawing on the Heat Network Technical Assurance Scheme being developed for Great Britain, or joining it in future, subject to policy alignment, any legislative changes needed and agreement with the relevant authorities. Nothing is committed. Operators watching HNTAS for Great Britain reasons should note that a Northern Ireland pathway is at least contemplated. For background on the scheme itself, see our HNTAS compliance guide.

Timing

The consultation opened on 6 August 2026 and closes at midnight on 1 October 2026. The Department will publish a summary of responses, then use them in developing the Heat Networks Operational Regulations, which have to go through the Assembly affirmative resolution process including consideration by the Economy Committee. The stated intention is to bring the secondary legislation forward before the end of the current mandate, subject to Assembly timetabling.

No commencement date has been set, and no length has been given for the transition period. Anyone quoting a hard Northern Ireland compliance deadline at this stage is guessing.

What operators should do now

Three things are worth acting on before the framework lands.

First, confirm your notification status under the 2014 regulations. Deemed authorisation is the low-friction route into the new regime and it rests on already being on the register. Establishing whether each network was notified, and that the details held are current, is a small job now and a larger one under a transition deadline.

Second, check your bills against the existing metering and billing requirements. These are live obligations, not future ones, and they are proposed to carry across essentially intact. A bill that satisfies the 2014 rules today is a bill that satisfies the equivalent authorisation condition tomorrow. Our guide to compliant billing covers the same ground for Great Britain, and the underlying billing information requirements overlap substantially.

Third, start keeping the records the proposed conditions would ask for. Registration details, meter installation and maintenance history, billing accuracy, complaints and how they were resolved, and whatever periodic reporting is settled on. None of that is jurisdiction-specific. The regulator asking the question changes; the evidence that answers it does not, and a complaints log or a meter compliance record built now will still be the right record when the Utility Regulator asks for it.

A note on Great Britain documents. Our document editions are written to the Ofgem authorisation conditions and are not a Northern Ireland compliance product. If you operate networks in both jurisdictions, they cover the Great Britain side. We will publish Northern Ireland material once there is draft legislation to write against rather than a consultation.

How to respond

Responses go to the Department through the Citizen Space consultation portal or by email to heatnetworks@economy-ni.gov.uk. The full document, including the seven consultation questions and the annexes covering the technical and legal detail, is on the Department for the Economy website. The Department has asked operators, developers and managing agents to read the annexes alongside the main text.

This page will be updated as the Department publishes its summary of responses and as the Heat Networks Operational Regulations take shape.

Heat network regulation in Northern Ireland