ECO4 is worth up to £10,000–£25,000 depending on the measures installed
If you are looking for a cash payment from the ECO4 scheme, you will not find one. The grant covers the full cost of energy efficiency improvements installed in your home, not a direct bank transfer. The total value of the work you receive can range from £10,000 to £25,000 depending on your property.
The ECO4 grant is worth up to £10,000–£25,000 depending on your home's size, EPC rating, and measures needed. It covers 100% of installation costs for eligible low-income households, not as cash but as free energy efficiency improvements.
- ECO4 covers 100% of installation costs for eligible low-income households.
- Grant value ranges from £10,000 to £25,000 depending on property size.
- No cash payment is given; the grant pays for energy efficiency measures directly.
- Average spend per home is around £10,000 according to Ofgem delivery data.
- Measures include loft insulation, solid wall insulation, and first-time central heating.
- ECO4 is worth up to £10,000–£25,000 depending on the measures installed
- The average ECO4 grant covers 100% of installation costs for eligible households
- The main measures funded under ECO4 and their typical costs
- Quick numbers, typical ECO4 grant values by measure
- How the ECO4 grant value is calculated for your property
- The ECO4 grant is worth more than the cash value because of additional savings
- Who qualifies for the full ECO4 grant value, eligibility rules
- How to verify your ECO4 installer and ensure the grant is applied correctly
The exact grant value depends on three things: the size of your home, its current energy performance certificate (EPC) rating, and the specific measures needed to bring it up to standard. A small flat needing only loft insulation will receive far less than a large detached house requiring solid wall insulation. The Department for Energy Security and Net Zero (DESNZ) sets the rules for how much energy suppliers can spend per property (DESNZ, ECO4 scheme guidance). Ofgem publishes delivery data showing the average spend per home is around £10,000, but can exceed £20,000 for complex installations (Ofgem, ECO4 delivery data).
The average ECO4 grant covers 100% of installation costs for eligible households
ECO4 is a full grant, not a loan or partial subsidy. Eligible low-income households pay nothing for approved measures. The installer claims the funding directly from the energy supplier, so you do not receive cash but the works are free at the point of use.
The scheme is built to remove financial barriers to home energy improvements. GOV.UK confirms that ECO4 covers 100% of the cost of eligible measures for qualifying households (GOV.UK, ECO4 scheme overview). The Energy Saving Trust notes that no upfront payment is required from the homeowner, and the installer must not ask for any contribution unless the property requires more than the standard cap allows (Energy Saving Trust, ECO4 eligibility).
The main measures funded under ECO4 and their typical costs
First-time central heating
If your home has never had gas central heating, ECO4 can fund a full system including boiler, radiators, and pipework. The average cost covered by the grant is £4,000 to £6,000 (Energy Saving Trust, typical measure costs). This applies only to homes with an EPC rating of E, F, or G that currently rely on electric storage heaters or other inefficient systems.
Loft insulation
Loft insulation is one of the cheapest measures under ECO4, typically costing £300 to £800 to install (Energy Saving Trust, loft insulation). The grant covers the full cost, including topping up existing insulation to the recommended 270mm depth.
Cavity wall insulation
For homes with unfilled cavity walls, ECO4 funds injection insulation costing £1,000 to £2,500 (Energy Saving Trust, cavity wall insulation). The installer must check that the walls are suitable and that no damp issues exist.
Solid wall insulation
Solid wall insulation, either internal or external, is the most expensive single measure. The grant covers £8,000 to £15,000 for external wall insulation, and £5,000 to £10,000 for internal wall insulation (Energy Saving Trust, solid wall insulation). Ofgem data shows this is the most common high-value installation under ECO4 (Ofgem, ECO4 installation data).
Quick numbers, typical ECO4 grant values by measure
| Measure type | Typical cost covered by grant | Typical annual saving on energy bills |
|---|---|---|
| First-time central heating | £4,000–£6,000 | £300–£500 |
| Loft insulation | £300–£800 | £150–£250 |
| Cavity wall insulation | £1,000–£2,500 | £200–£350 |
| Solid wall insulation | £8,000–£15,000 | £300–£600 |
Savings figures come from the Energy Saving Trust’s typical savings estimates (Energy Saving Trust, typical savings). Ofgem’s ECO4 measure data confirms these cost ranges are representative of current installations (Ofgem, ECO4 measure data).
How the ECO4 grant value is calculated for your property
The grant value is calculated based on your property’s current EPC rating, which must be D, E, F, or G to qualify. The scheme aims to bring your home up to an EPC rating of C, so the grant covers the cost of the measures needed to achieve that target. Property type, house, flat, or bungalow, also affects the calculation because larger homes generally need more insulation or heating work.
The scheme operates with a “cost cap” per property. For standard measures like loft or cavity wall insulation, the cap is typically £10,000 to £15,000. For solid wall insulation, the cap can rise to £20,000 or more. DESNZ publishes the official cost cap guidance that energy suppliers must follow (DESNZ, ECO4 cost cap guidance). Ofgem’s ECO4 rules confirm that the total grant value cannot exceed the cost cap for that property type and measure combination (Ofgem, ECO4 rules).
The ECO4 grant is worth more than the cash value because of additional savings
Beyond the installation cost, eligible households benefit from ongoing reductions in energy bills. The Energy Saving Trust estimates that after installation, average savings range from £300 to £600 per year depending on the measures installed (Energy Saving Trust, savings data). Over a ten-year period, that adds up to £3,000 to £6,000 in reduced bills.
Some installers also include additional support as part of the package. This can include boiler servicing, thermostat upgrades, or heating controls that improve efficiency further. Ofgem’s ECO4 impact reports note that these extras are not always mandatory but are commonly offered by registered installers to ensure the property reaches its target EPC rating (Ofgem, ECO4 impact reports).
Who qualifies for the full ECO4 grant value, eligibility rules
To receive the full grant value, you must meet the eligibility criteria. The primary route is receiving one of the following means-tested benefits: Universal Credit, Pension Credit, Child Tax Credit, Working Tax Credit, Income Support, Income-based Jobseeker’s Allowance, or Income-related Employment and Support Allowance. You can also qualify if you receive Housing Benefit or the Guarantee element of Pension Credit. GOV.UK maintains the full eligibility list (GOV.UK, ECO4 eligibility page).
If you do not receive these benefits, you may still qualify through Local Authority Flexible Eligibility (LA Flex). Under LA Flex, your local council can refer you to the scheme if your household income is low or if you have a health condition made worse by a cold home. Ofgem publishes guidance on how LA Flex works (Ofgem, LA Flex guidance).
Your property must be owner-occupied or privately rented (with the landlord’s permission). It must have an EPC rating of D, E, F, or G. Properties rated A, B, or C do not qualify for ECO4 unless they require a specific measure like first-time central heating.
How to verify your ECO4 installer and ensure the grant is applied correctly
To access the full grant value, you must use an installer registered with the correct certification bodies. For heat pumps and solar panels, the installer must be MCS certified. For insulation and heating works, they must be registered with TrustMark. The installer submits the claim to the energy supplier, so using an unregistered company means the grant will not be applied and you could be charged for work that should have been free.
You can check an installer’s MCS certification on the MCS register (MCS register). TrustMark registration can be verified on the TrustMark website (TrustMark). GOV.UK also lists the installer requirements for ECO4, including that installers must be Gas Safe registered for any gas heating work (GOV.UK, ECO4 installer requirements).
how to find a trusted ECO4 installer in your area
Before work begins, ask the installer for a written quote showing the measures to be installed and confirming that the grant covers 100% of the cost. Do not sign anything until you are satisfied that the installer is registered and the scope of work matches your property’s needs. If you are unsure, contact your local authority’s energy advice service for guidance.
what to do if an ECO4 installer asks for payment
Frequently Asked Questions
The ECO4 grant is not a cash payment. It covers the full cost of energy efficiency improvements installed in your home, worth up to £10,000–£25,000. GOV.UK confirms no direct bank transfer is involved.
The grant value depends on your home's size, current EPC rating, and the measures needed. A small flat may receive around £10,000, while a large detached house can exceed £20,000, as per Ofgem delivery data.
No, eligible households pay nothing. ECO4 covers 100% of the cost for approved measures. The Energy Saving Trust states no upfront payment is required from the homeowner.
The average spend per home is around £10,000, based on Ofgem delivery data. However, complex installations in larger homes can reach up to £25,000.
Yes, if your home has a low EPC rating and you meet the eligibility criteria. ECO4 can fund additional measures like insulation or a heat pump, even if you already have gas central heating.
