The Serious Fraud Office issued a public appeal for information on suspected fraud in home heating and insulation schemes last week, the first time the agency has named ECO4 in a formal investigation. That single fact should make every homeowner pause before signing a grant-funded upgrade contract.
As reported by GOV.UK, the SFO is seeking evidence of “suspected fraud” linked to government-funded home energy efficiency programmes. The investigation targets companies that may have submitted false claims, installed substandard equipment, or misrepresented the work done. For the typical household, the risk is not abstract: a fraudulent installation can leave you with a non-functioning heat pump, voided warranty, and a demand to repay the grant.
Who qualifies, and who doesn’t
ECO4 targets low-income and vulnerable households, often via energy suppliers or local authorities. Eligible homeowners can receive fully funded insulation, heat pumps, or solar panels. But the scheme’s complexity, multiple delivery partners, varying installer standards, and regional variations, creates gaps that bad actors exploit. Ofgem, which administers ECO4, requires all installations to meet PAS 2030 or MCS standards, yet enforcement relies on spot checks and whistleblowers.
The catch is that homeowners are rarely told what to look for. A legitimate installer will provide a detailed scoping survey, a written contract with clear milestones, and certification upon completion. If any of those are missing, you may be dealing with a firm that cuts corners, or worse.
What it costs a typical 3-bed semi
A properly installed air-source heat pump for a 3-bed semi typically costs between £7,000 and £13,000 after the Boiler Upgrade Scheme grant of £7,500. ECO4 covers the full cost for qualifying households, but the installer still receives payment from the supplier. Fraudulent claims can inflate that cost, with the supplier or installer pocketing the difference, leaving you with an undersized or incorrectly fitted system that fails in winter.
The SFO investigation suggests the scale may be significant. Documents seen by industry bodies indicate that some firms have claimed for work never done or installed equipment that does not meet minimum efficiency requirements. For the homeowner, the result is a system that increases rather than reduces energy bills.
How to protect yourself, and your EPC rating
Your first step: verify the installer. The Microgeneration Certification Scheme (MCS) and PAS 2030:2019 are the gold standards. Ask for their certificate number and check it on the MCS website. Second: never pay a large upfront deposit. Legitimate ECO4 work is fully funded, so you should not be asked for cash. Third: insist on a handover pack containing the commissioning certificate, warranty documents, and manufacturer guarantees. Without these, your home insurance and future EPC assessment may be invalidated.
If you suspect fraud, report it to the SFO via its online portal or to Action Fraud. The government has also set up a dedicated ECO4 helpline for homeowners, call 0800 444 202 for guidance. Do not wait until the system fails. The SFO’s appeal shows the best defence is due diligence before the digger arrives.
Frequently Asked Questions
For a typical 3-bed semi-detached home, an air-source heat pump costs between £7,000 and £13,000 after the £7,500 Boiler Upgrade Scheme grant. The full cost before the grant is usually £14,500 to £20,500, so the grant significantly reduces the upfront expense for eligible homeowners.
ECO4 is a UK government scheme that provides fully funded insulation, heat pumps, or solar panels to low-income and vulnerable households. Eligibility is typically determined by energy suppliers or local authorities, targeting those on certain benefits or with low incomes, and the work must meet PAS 2030 or MCS standards.
You can verify an installer by asking for their MCS certificate number and checking it on the MCS website. Legitimate installers must meet PAS 2030:2019 standards, provide a written contract with milestones, and give a handover pack with commissioning and warranty certificates. Never pay a large upfront deposit, as ECO4 work is fully funded.
If you suspect fraud, report it to the Serious Fraud Office via its online portal or to Action Fraud. Signs of fraud include substandard equipment, missing certification, or being asked to repay a grant after a faulty installation, which can also void your home insurance and EPC assessment.
A fraudulent installation, such as an undersized or incorrectly fitted heat pump, can increase your energy bills instead of reducing them. It may also invalidate your home insurance and future EPC assessment, as the system won't meet minimum efficiency requirements, leaving you with higher costs and no warranty protection.
