ECO4 Scheme for Landlords: Complete Guide to Free Upgrades
How to access free insulation and heating improvements through the Energy Company Obligation
ECO4 installer fitting cavity wall insulation in a British rental property
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The ECO4 scheme (Energy Company Obligation 4) is one of the most valuable funding sources for UK landlords looking to improve their properties' energy efficiency. If your tenant receives certain benefits, you may qualify for free insulation, heating upgrades, or both.
ECO4 runs until March 2026 and is funded by energy companies who are obligated to help improve energy efficiency in homes. For landlords with eligible tenants, this can mean thousands of pounds in free improvements, often including cavity wall insulation, loft insulation, and even new heating systems.
What is ECO4?
ECO4 (Energy Company Obligation 4) is a government scheme that requires large energy suppliers to fund energy efficiency improvements in homes. The scheme specifically targets fuel-poor and vulnerable households, with a focus on properties with low EPC ratings.
Energy companies must meet their ECO obligations, so they actively seek eligible properties to improve. This means qualified installers are incentivised to find and upgrade qualifying homes, often at no cost to the landlord or tenant.
How ECO4 Works
- 1Energy suppliers are legally required to achieve carbon reduction targets
- 2They fund ECO installers to carry out improvements in eligible homes
- 3Installers find eligible properties through direct applications or LA Flex referrals
- 4Improvements are installed free or heavily subsidised
Landlord-Specific Eligibility
Private landlords can access ECO4 funding, but there are specific requirements that must be met. The key distinction from homeowner applications is that eligibility is based on the tenant's circumstances, not the landlord's.
Landlord Requirements
- Property must be privately rented (not social housing)
- You must own the property or have authority to approve works
- Property must have an EPC of D, E, F, or G
- You must agree to not increase rent due to improvements (some local conditions)
- Property must be in England, Scotland, or Wales
Tenant Requirements
- Tenant must receive a qualifying benefit (see below)
- Or qualify through LA Flex criteria
- Tenant must consent to works being carried out
- Tenant cannot be a family member of the landlord
Tenant Benefit Requirements
For standard ECO4 eligibility, your tenant must receive one of the following benefits. If they receive any of these, your property is likely eligible for free or subsidised improvements.
Qualifying Benefits
- Universal Credit
- Pension Credit (Guarantee Credit)
- Income-based JSA
- Income-related ESA
- Income Support
- Child Tax Credit (income under £16,480)
- Working Tax Credit (income under £16,480)
- Housing Benefit
- Pension Credit (Savings Credit)
- Child Benefit (income under £16,480)
LA Flex Route (Local Authority Flex)
If your tenant does not receive qualifying benefits, you may still be eligible through the LA Flex (Local Authority Flex) pathway. This allows local councils to refer households who are fuel poor or vulnerable but do not meet the standard benefit criteria.
LA Flex Eligibility Criteria
Local authorities can declare households eligible if they meet certain vulnerability or fuel poverty criteria:
- Low income: Household income below £31,000 (or £36,000 in some areas)
- Poor EPC: Property rated E, F, or G (some councils include D)
- Vulnerable occupant: Elderly, disabled, or health condition worsened by cold
- Fuel poverty indicators: High energy costs relative to income
What Measures Are Covered
ECO4 covers a wide range of energy efficiency improvements. The specific measures available depend on your property's current condition and what will deliver the most carbon savings.
ECO4 Covered Measures (Typical Savings)
| Improvement | Low Estimate | High Estimate |
|---|---|---|
| Cavity wall insulationUsually 100% free. Worth £800-£1,500. | £0 | £0 |
| Loft insulationUsually 100% free. Worth £400-£600. | £0 | £0 |
| Room-in-roof insulationUsually 100% free. Worth £1,500-£3,000. | £0 | £0 |
| Internal solid wall insulationOften heavily subsidised. Worth £8,000-£14,000. | £0 | £2,000 |
| External solid wall insulationOften heavily subsidised. Worth £10,000-£20,000. | £0 | £3,000 |
| First-time central heatingFor properties without existing heating system. | £0 | £500 |
| Boiler replacementWhen existing boiler is broken or inefficient. | £0 | £500 |
| Air source heat pumpIncreasingly available through ECO4. | £0 | £2,000 |
Zero cost means typically fully funded. Contribution required for some measures on some properties.
How to Apply
There are two main routes to accessing ECO4 funding: direct application through an ECO installer, or referral through your local authority's LA Flex scheme.
Route 1: Direct Application (Tenant on Benefits)
- 1Confirm tenant eligibility
Ask tenant to confirm they receive a qualifying benefit
- 2Find ECO installers
Search for TrustMark registered ECO installers in your area
- 3Request assessment
Installer will survey the property and confirm eligible measures
- 4Provide documentation
Tenant provides benefit evidence, landlord provides ownership proof
- 5Works carried out
Installer schedules and completes work, typically within 4-8 weeks
Route 2: LA Flex Referral
- 1Contact local authority
Find your council's energy efficiency or housing team
- 2Complete LA Flex application
Provide household income and vulnerability information
- 3Council issues declaration
If eligible, council provides ECO4 eligibility declaration
- 4Matched with installer
Council may refer you or you can approach installers with declaration
Working with ECO Installers
ECO installers are commercial companies contracted by energy suppliers to deliver ECO measures. They are paid by the energy companies, which is why improvements can be free to you. However, quality varies, so choose carefully.
ECO4 vs Other Schemes
Several government schemes offer funding for energy efficiency improvements. Here is how ECO4 compares to other options available to landlords.
| Scheme | Funding Level | Key Requirement | Best For |
|---|---|---|---|
| ECO4 | Up to 100% free | Tenant on benefits | Insulation, heating |
| Boiler Upgrade Scheme | Up to £7,500 | Valid EPC, replacing fossil fuel | Heat pumps |
| Warm Homes Local Grant | Up to £30,000 | Tenant income under £36,000 | Comprehensive upgrades |
| Great British Insulation | Subsidised | EPC D or below in council tax A-D | Cavity, loft insulation |
Deadline and ECO5
ECO4 is currently scheduled to run until March 2026. However, a successor scheme (ECO5) is expected to follow, likely with similar or expanded eligibility criteria.
Your Next Steps
- 1
Check tenant eligibility
Ask your tenant if they receive any qualifying benefits, or whether they would consent to an LA Flex application.
- 2
Check your property's EPC
ECO4 requires EPC D, E, F, or G. If you do not have a current EPC, get one.
- 3
Contact ECO installers or your local authority
Start the application process. Get quotes from multiple TrustMark registered installers.
- 4
Get work scheduled before March 2026
Allow adequate time for assessment, approval, and installation.