UK Government Backs £90 Million Investment in Heat Networks
The government has committed £90 million to expand and repair heat networks across England and Wales. More than 750,000 homes are expected to benefit from cleaner heating systems, while the investment is projected to support over 2,000 jobs. The announcement represents one of the largest single funding packages for district heating infrastructure in recent years.
Heat networks distribute thermal energy from a central source to multiple buildings through insulated underground pipes. They offer an alternative to individual gas boilers, particularly in urban areas where dense housing makes building-by-building upgrades costly and disruptive. The technology has been used in parts of Europe for decades but remains relatively uncommon in the UK outside certain city centres and large developments.
This latest funding follows a longer-term commitment announced in January 2026, when the government allocated £195 million per year through to 2029/30 for the Green Heat Network Fund. That ongoing support forms part of the Warm Homes Plan, which sets out how the UK intends to reduce carbon emissions from residential heating while addressing energy affordability. Consequently, the recent £90 million package should be understood as an addition to existing annual commitments rather than a replacement for them.
London Thames project receives largest allocation
The London Strategic Heat Main will receive £41 million, making it the single largest beneficiary of the September 2026 announcement. The network will run under and alongside the River Thames, initially serving seven London boroughs. Officials estimate the system could eventually supply heat to 650,000 homes, with the potential to reach more than a million residents if later phases extend into areas including Barking and Dagenham, Tower Hamlets, and Kensington and Chelsea.
The scale of the London project is significant. A heat network serving hundreds of thousands of homes would rank among the largest in the UK and represent a substantial shift in how heating infrastructure is planned and delivered in the capital. Moreover, the Thames location offers logistical advantages, as underground pipes can follow the river corridor without requiring extensive disruption to roads and existing utilities.
Other schemes funded through the package include network expansions and upgrades in Bradford and Solihull. These regional projects reflect a broader geographic spread of investment beyond London, although the capital accounts for the majority of allocated funding. Therefore, the distribution of funds highlights both the density challenge in major cities and the government's intention to support heat network development across different urban contexts.
In addition to new infrastructure, £13.3 million has been earmarked to upgrade 76 inefficient heat networks already in operation. Many existing district heating systems lose energy through faulty pipes, poor insulation, or outdated equipment. Repairing these networks should reduce waste and improve performance, which in turn affects both carbon emissions and running costs for residents.
Two funding streams address different network needs
The government operates two main programmes for heat network support. The Green Heat Network Fund backs new low-carbon and zero-carbon systems, as well as extensions to existing networks. It was introduced in 2022 with an initial allocation of £288 million and has since expanded through successive funding rounds. The Heat Network Efficiency Scheme, by contrast, focuses on repairs and efficiency improvements to older systems that may have been built decades ago using less efficient technology.
The Green Heat Network Fund now receives £195 million per year through to 2029/30, according to the Warm Homes Plan published in early 2026. The Heat Network Efficiency Scheme is allocated £15 million per year over the same period. Together, these two streams provide a framework for both expanding low-carbon heating infrastructure and improving the performance of legacy systems.
An investor factsheet published in 2026 indicated that approximately £792 million had been allocated across the first nine rounds of the Green Heat Network Fund. Guidance for Round 12 shows the fund remains open, with applications having closed on 25 September 2026. Eligibility extends to local authorities, private developers, housing associations, and energy service companies proposing networks that meet low-carbon or zero-carbon criteria.
The distinction between the two schemes matters for businesses involved in heat network development or operation. New projects typically require substantial capital investment and long payback periods, making multi-year funding commitments important for financial planning. Efficiency upgrades, meanwhile, often deliver faster payback through reduced energy losses and lower operational costs. Consequently, both funding routes create different commercial opportunities for contractors, equipment suppliers, and energy service providers.
What these funding decisions mean for UK businesses
Heat networks affect several business sectors directly. Construction firms and civil engineering contractors deliver the physical infrastructure, including pipework, plant rooms, and connection works. Energy service companies often operate the networks once built, selling heat to end users and managing maintenance. Equipment manufacturers supply boilers, heat pumps, heat exchangers, and control systems. For these businesses, sustained government funding provides a clearer pipeline of projects and reduces the risk that planned work will be cancelled or deferred due to budget uncertainty.
Property developers also need to consider heat networks when planning residential or mixed-use schemes in urban areas. Some local planning authorities require new developments to connect to existing heat networks or provide district heating infrastructure as a condition of approval. Furthermore, access to low-carbon heating can be a selling point for commercial tenants and residential buyers who face increasing scrutiny over building energy performance and carbon footprints.
Public sector organisations, particularly local authorities and housing associations, are major stakeholders in heat network projects. They often own land, housing stock, and anchor loads such as leisure centres or civic buildings that provide the baseline demand needed to make a network financially viable. Councils also have statutory duties around fuel poverty and climate targets, making heat networks a potential tool for meeting multiple policy objectives simultaneously. However, local authorities typically lack the capital to fund large infrastructure projects alone, so access to national grant programmes becomes critical.
For businesses tendering for public contracts, heat network infrastructure may become a factor in procurement decisions. Suppliers bidding for facilities management contracts, property development frameworks, or long-term energy service agreements may find that low-carbon heating solutions carry additional weight in evaluation criteria. Similarly, companies with net-zero commitments need to consider how their office, retail, or industrial premises are heated, and connection to a low-carbon heat network could be a simpler route to reducing Scope 1 and Scope 2 emissions than retrofitting individual buildings with heat pumps or biomass boilers.
There are also implications for businesses that own or occupy buildings in areas where heat networks are planned. Connection to a district heating system usually requires physical works, legal agreements, and a switch from individual heating systems to a metered heat supply. Building owners need to understand the costs, timescales, and potential disruption involved, as well as the long-term implications for energy bills and maintenance responsibilities. Tenants may face changes to how heating costs are calculated and billed, which can affect lease negotiations and service charge transparency.
The efficiency funding stream creates a separate set of opportunities and risks. Businesses operating older heat networks face pressure to improve performance, both to meet carbon targets and to maintain competitive pricing against alternative heating options. The £13.3 million allocated for upgrades signals that government support is available, but accessing it requires demonstrating clear efficiency gains and value for money. Therefore, network operators need to assess their infrastructure condition, identify the most cost-effective improvements, and prepare robust business cases for funding applications.
Core facts about the funding package
- The Department for Energy Security and Net Zero announced the £90 million package on 23 September 2026, targeting new low-carbon heat networks, network extensions, and efficiency repairs across England and Wales.
- The London Strategic Heat Main will receive £41 million to serve an initial seven boroughs, with potential future expansion to reach more than 650,000 homes and over a million residents.
- A further £13.3 million will fund upgrades to 76 inefficient heat networks, addressing energy losses from faulty pipes and outdated equipment.
- The Green Heat Network Fund now operates with £195 million per year through to 2029/30, while the Heat Network Efficiency Scheme receives £15 million annually over the same period.
- Approximately £792 million had been allocated across the first nine rounds of the Green Heat Network Fund by 2026, according to official investor documentation.
- The government projects the £90 million investment will support more than 2,000 jobs, reflecting the labour intensity of heat network construction and installation work.
- Applications for Round 12 of the Green Heat Network Fund closed on 25 September 2026, indicating that the funding mechanism remains active with regular application windows for eligible organisations.
Strategic considerations for businesses and local authorities
Heat networks require long-term planning and coordination between multiple parties. Projects can take several years from initial feasibility studies to operational service, and they depend on securing anchor loads, planning permissions, wayleaves, and often complex funding packages that combine grants, debt, and sometimes equity investment. As a result, businesses and public bodies involved in heat network development need to think in multi-year timescales and manage considerable delivery risk.
The government's decision to commit ongoing annual funding through to 2029/30 provides greater certainty than short-term, ad hoc allocations. That predictability helps project sponsors secure private finance, as lenders and investors need confidence that grant funding will remain available through the construction and commissioning phases. Nevertheless, the competitive nature of funding rounds means not all applications succeed, and even well-prepared projects may face delays if they do not secure funding in their first application round.
For local authorities, heat networks can be a tool for addressing fuel poverty, reducing carbon emissions, and generating revenue through heat sales. However, councils also need to consider the financial and operational risks of owning or underwriting heat network infrastructure. Some networks have faced criticism over high heat prices, poor reliability, or disputes over billing transparency. Therefore, careful procurement, robust contracts, and clear governance arrangements are necessary to protect both the authority and the end users.
Businesses considering investment in heat networks should evaluate both the policy landscape and the commercial fundamentals. Government support for low-carbon heating is likely to continue, given the UK's net-zero targets and the difficulty of decarbonising heat through other means at scale. However, heat networks must also deliver reliable, affordable service to compete with alternatives such as individual air-source heat pumps or hydrogen-ready boilers, should those technologies become more widely available.
Energy costs and carbon pricing will also shape the commercial case for heat networks. If gas prices remain volatile or carbon taxes increase, centralised low-carbon heating becomes more competitive. Conversely, if electricity prices fall or individual heat pumps become significantly cheaper, the relative advantage of district heating may narrow. Consequently, businesses need to model different scenarios and build flexibility into their project plans.
There are also workforce and supply chain considerations. The government's estimate of 2,000 jobs supported by this funding package reflects the need for skilled labour in engineering, construction, and energy management. Businesses involved in heat network projects may face competition for qualified staff, particularly as multiple projects ramp up simultaneously. Similarly, supply chains for specialist equipment such as heat interface units, plate heat exchangers, and high-temperature heat pumps may come under pressure if demand increases faster than manufacturing capacity. Planning ahead for procurement and workforce development can help mitigate these risks.
Finally, businesses should monitor the regulatory environment for heat networks. The Energy Security and Net Zero Department has signalled that it intends to introduce stronger consumer protections and performance standards for district heating. Operators may face new obligations around pricing, service levels, and information disclosure. Staying informed about regulatory developments and engaging with consultations can help businesses anticipate changes and shape the rules that will govern the sector in future.
Where to find additional information
Detailed guidance on the Green Heat Network Fund, including eligibility criteria, application deadlines, and technical requirements, is available on the government's official website. The Department for Energy Security and Net Zero publishes updates on funding rounds and policy developments related to heat networks and the Warm Homes Plan.
Local authorities and businesses planning heat network projects can access technical support and feasibility funding through the Heat Network Delivery Unit, which works with project sponsors to develop investable proposals. The unit provides advice on project structuring, commercial models, and funding applications.
Information on the Heat Network Efficiency Scheme, including how to apply for grants to upgrade existing systems, is also published by the Department for Energy Security and Net Zero. Organisations operating inefficient networks should review the scheme guidance to understand the types of improvements eligible for support and the evidence required to demonstrate value for money.
For broader context on the UK's approach to decarbonising heat, the Warm Homes Plan sets out the government's strategy through to 2030. The plan covers not only heat networks but also building energy efficiency, heat pump deployment, and support for low-income households. Understanding how heat networks fit within this wider framework can help businesses identify opportunities and anticipate policy directions.
We support organisations navigating the commercial and compliance implications of low-carbon heating through our net-zero advisory services, which cover carbon reduction planning, procurement strategy, and climate-related reporting. Businesses looking to develop skills in energy management and sustainability can explore training options through the SBS Academy, which offers practical courses on net-zero implementation and environmental compliance.