New heat network regulations now in force across Great Britain: what owners need to do
Today marks a major milestone for heat networks across Great Britain. From 27 January 2026, Ofgem officially begins regulating heat networks, creating a new compliance landscape for anyone who owns or operates a communal or district heating system. This change introduces long awaited consumer protections and brings heat networks closer to the standards seen in gas and electricity markets.
Why this matters
The Heat Networks (Market Framework) (Great Britain) Regulations 2025 take effect today and establish the legal foundation for the new regulatory framework.
The new regime is underpinned by Ofgem’s role as the statutory regulator for heat networks. Ofgem has published formal guidance, the regulatory timeline, registration requirements and consultation responses on its official heat networks hub here: Ofgem Heat Networks Regulation Hub.
Together these form the basis for a sector-wide shift in expectations relating to consumer protection, billing transparency and operational standards.
What owners and operators must do immediately
1. Confirm your regulatory role
Heat network ownership brings responsibilities that fall into two regulated categories. The operator controls the physical system. The supplier provides heat to customers. Many building owners fall into both categories and must meet both sets of regulatory requirements.
2. Begin complying with Ofgem requirements
From today, operators and suppliers must meet new consumer protection standards aligned with wider energy markets. These include transparent billing, clear communication, robust complaints handling and protections for vulnerable households. Consumers now also have formal access to the Energy Ombudsman for unresolved complaints.
3. Prepare for authorisation and registration
All heat networks operating before January 2027 will be automatically authorised – ‘deemed authorisation’. Full registration with Ofgem must be completed by 26 January 2027. Operators of heat networks with deemed authorisation must register with Ofgem using the heat networks digital service by 26 January 2027. After this period, authorisation will be granted by application to Ofgem.
4. Carry out technical due diligence
Alongside the new regulatory framework taking effect today, the Government is also developing the Heat Network Technical Assurance Scheme (HNTAS), which will introduce mandatory technical standards for both new and existing heat networks. According to the Department for Energy Security & Net Zero, HNTAS will not begin immediately but will be phased in with a planned launch in 2027, following further consultation and finalisation of the technical requirements. This phased approach is intended to give the sector sufficient time to understand, shape and prepare for compliance with the forthcoming technical standards.
5. Continue meeting metering and billing duties
The introduction of Ofgem regulation does not replace existing obligations under the Heat Network (Metering and Billing) Regulations 2014. These duties include installing meters where feasible, billing based on actual consumption and maintaining accurate data records.
Looking ahead
With Ofgem now holding enforcement powers including financial penalties, compensation orders and ongoing audits, compliance is no longer optional. Today represents a major turning point for the heat network sector. Owners and operators who act early will be best positioned to reduce regulatory risk and deliver a more transparent and reliable service to consumers.
