The UK government's £15 billion Warm Homes Plan is the biggest home upgrade programme in British history. This is the operational guide for growing installation businesses - what it means for your pipeline, accreditations, and operations through 2030.
Jamie Duncan
The Warm Homes Plan is the UK government's £15 billion commitment to upgrade 5 million homes by 2030. It is the largest home energy upgrade programme in British history, replacing a fragmented landscape of schemes with a single, funded pathway to decarbonise the housing stock. But almost every guide published so far is aimed at homeowners wondering if they qualify. This is the installer's guide - what the plan actually means for your pipeline, your accreditations, and how you run your business over the next five years.
The Warm Homes Plan was published in January 2026. It sets out how the government intends to spend £15 billion on home energy upgrades over the current parliament. That headline figure breaks down into several distinct funding streams, each relevant to installers in different ways.
Direct grants for low-income households: £4.4 billion. This replaces the existing patchwork of ECO, GBIS, and local authority schemes with a single, centrally administered programme. Delivery will sit under the new Warm Home Agency, which will manage eligibility, quality assurance, and installer accreditation in one place.
Consumer loans: £1.7 billion. Zero-interest and low-interest loans for homeowners who do not qualify for grants but want to invest in heat pumps, insulation, or solar. This is the funding stream that unlocks the able-to-pay market at scale. For the first time, there will be an affordable financing mechanism for homeowners who want to upgrade but cannot justify the upfront cost.
Boiler Upgrade Scheme: £2.7 billion total budget. The BUS has been extended to March 2030 and expanded. Air-to-water heat pumps still receive £7,500. New additions include £2,500 for air-to-air heat pumps and £2,500 for heat batteries (the heat battery grant will be available once product and installation standards are finalised).
Heat Training Grant: £7 million per year. Available to installers and businesses investing in heat pump training and skills development. This is not a large fund relative to the others, but it directly subsidises the cost of upskilling your team.
Warm Homes Fund: £600 million. Loans and repayable investments to help social landlords make their retrofit programmes go further. This sits alongside the separate £1.29 billion Warm Homes: Social Housing Fund for direct grant-funded upgrades.
The target: 450,000 heat pump installations per year by 2030. That covers both new builds (around 200,000 under the Future Homes Standard) and retrofit of existing homes. For context, there were around 52,000 MCS-certified retrofit installations in 2025. Whether or not the full target is hit, the direction and the money behind it are real.
The plan is not just future policy. Several changes are already taking effect or are imminent, and they directly affect how installation businesses operate.
GBIS ends on 31 March 2026 (applications already closed in January). ECO4 runs until December 2026, with no ECO5 planned. If your business relied on funded scheme work as a primary revenue stream, the transition to private market sales is not something you can defer. The cliff edge is here.
The good news is that the private and grant-funded markets are substantially larger than ECO ever was. ECO was worth roughly £1 billion per year. The Warm Homes Plan commits £4.4 billion in direct grants alone, plus £1.7 billion in loans and the expanded BUS. The volume opportunity is bigger, but the way you access it is different.
The Boiler Upgrade Scheme now includes:
Two other recent changes make BUS more accessible. The 1-metre planning restriction for air source heat pumps was removed in May 2025, meaning installations no longer need to be sited more than 1 metre from the property boundary. This opens up terraced houses, smaller properties, and constrained sites that were previously difficult or impossible. And the EPC insulation requirement was removed in May 2024 - homeowners no longer need a minimum insulation level before they can apply.
The Clean Heat Market Mechanism, launched in April 2025, requires boiler manufacturers to sell heat pumps as a percentage of their total boiler sales. Year one set that target at 6%. From April 2026, it rises to 8%.
For installers, this means manufacturers are increasingly motivated to support your sales. Expect more manufacturer-backed incentives, training support, and lead generation programmes as they work to hit their targets. If you are MCS-certified, you are an asset they need.
The Future Homes Standard will require new builds to include low-carbon heating (predominantly heat pumps) and high levels of energy efficiency. Legislation is expected by the end of 2026, with a transition period before full enforcement. If you work with housebuilders or developers, this creates a predictable, long-term installation pipeline separate from the retrofit market.
One of the most important consequences of the Warm Homes Plan is that it clarifies which accreditations matter. If you have been unsure about whether to invest in MCS or TrustMark certification, the answer is now much clearer.
MCS certification has been confirmed as the sole recognised certification for the Clean Heat Market Mechanism. That means manufacturers can only count installations towards their CHMM obligation if the installer is MCS-certified. It is also required for all BUS applications.
The ROI is straightforward: without MCS, you cannot access BUS grants, you are invisible to CHMM-driven manufacturer incentives, and you are locked out of the fastest-growing segment of the market. For a detailed breakdown of the certification process and whether you need it, see our guide on MCS certification for solar and heat pump installers.
If you want to deliver grant-funded installations through the Warm Home Agency, you will need TrustMark registration and PAS 2030:2023 certification. Note that PAS 2035/2030:2023 is now the only valid version - earlier versions are no longer accepted.
This applies to the £4.4 billion in low-income grants and the £600 million Warm Homes Fund. If you are targeting the able-to-pay market through BUS and consumer loans, MCS alone may be sufficient. But if you want access to the full range of funded work, TrustMark and PAS are required alongside MCS.
The new Warm Home Agency will replace the current fragmented delivery landscape. Instead of dealing with multiple managing agents, scheme administrators, and quality assurance bodies, the Agency will centralise:
The details of how this will work in practice are still being developed, but the direction is clear: fewer intermediaries, more direct accountability, and a single point of administration.
Which accreditations do you need?
The demand picture over the next five years is the most favourable the clean tech installation market has ever seen. Here is what is driving it.
Government targets create a structural demand floor. 450,000 heat pump installations per year by 2030 is ambitious, but even hitting half of that represents a massive increase from current levels. The funding is committed, the regulatory framework is in place, and manufacturers are legally obligated to drive demand through CHMM.
Consumer loans unlock the able-to-pay market. The £1.7 billion loan programme addresses the single biggest barrier to residential uptake: upfront cost. Heat pump systems typically cost £8,000-15,000 after the BUS grant. Zero-interest loans make this comparable to a boiler replacement on monthly payments. This will bring a significant volume of homeowners into the market who were previously priced out.
Landlord EPC requirements create commercial pipeline. Private rented properties must reach EPC Band C by October 2030. Landlords who have deferred upgrades will need to act, creating a parallel demand stream that is less dependent on government grants.
Manufacturer incentives will intensify. As CHMM targets rise, manufacturers will invest more in supporting their installer networks. This could include subsidised equipment, lead generation, marketing support, and enhanced training. MCS-certified businesses will be the primary beneficiaries.
Competition for skilled engineers will intensify. The government estimates the plan could support 180,000 additional jobs in the sector. That is a signal of how much the workforce needs to grow, but it also means your best engineers will have options. Retention, training, and working conditions will matter more than ever.
The opportunity is real, but capturing it requires operational readiness. The businesses that will grow fastest are those investing now in the systems, accreditations, and capabilities they will need at higher volumes.
Start building private market capabilities now. The sales process, customer journey, and operational requirements are fundamentally different from funded scheme work. Your existing sales team and installation capability are valuable, but they need to be redirected. We have written a detailed guide on how ECO businesses can build a direct sales operation.
You are positioned for the growth. The question is whether your operations can handle higher volumes without breaking. That means looking at your quoting process, scheduling, compliance workflows, and customer communication. At 10-15 installations a month, you can manage with spreadsheets and manual processes. At 30-50, you cannot.
The business case for certification has never been clearer. BUS grants, CHMM manufacturer support, and consumer loan eligibility all require MCS. The cost of certification is modest relative to the market access it provides. Our guide covers whether you need MCS and how to get certified.
Solar, battery, and heat pump packages will be the sweet spot as consumer loans roll out. Homeowners making a significant investment want to do it once, not three times. Businesses that can quote, design, and deliver multi-technology installations from a single platform will have a significant advantage.
The installers who will capture this growth are the ones investing in operational capacity now. Not just accreditations and training, but the systems that let you manage more jobs, keep compliance tight, and give customers a professional experience from first enquiry to handover. That is what separates a business doing 15 installs a month from one doing 50.
As volumes increase, the operational complexity multiplies. Every installation generates compliance documentation, customer communications, scheduling requirements, and financial transactions. Businesses managing this manually will hit a ceiling.
Systems that handle MCS and DNO compliance automatically, manage multi-technology quoting, and give you visibility across your pipeline become essential infrastructure, not optional software. The businesses that invest in this early will scale faster and with fewer growing pains.
The Warm Homes Plan creates the most sustained, well-funded pipeline the UK clean tech installation market has ever seen. £15 billion in investment, regulatory mandates through CHMM, consumer financing, and a single delivery agency replacing years of fragmented schemes.
The businesses that will capture this opportunity are those that are operationally ready: MCS-certified, systems in place to manage volume, and capable of delivering a professional customer experience across multiple technologies. Whether you are an established heat pump installer looking to scale, an ECO business transitioning to private market work, or a new entrant considering heat pump installation, the window to prepare is now.
If you want to see how Payaca helps growing installation businesses manage compliance, quoting, and operations at scale, book a demo.
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