ECO4 Extended to December 2026 – Deadline, Eligibility & Grant Updates
ECO4 Extended means eligible UK households have more time to access support for energy efficiency improvements before the scheme deadline in December 2026. LAMTANS Engineering helps homeowners across the UK understand eligibility requirements, available funding routes, and suitable upgrades including insulation and heating improvements.
⏰ ECO4 now runs until 31 December 2026
In this article
Key takeaways
- ECO4 has been extended — eligible households now have until 31 December 2026.
- Eligibility requirements still apply: benefits, ECO4 Flex and property criteria routes.
- Funded measures include insulation upgrades, heating improvements and, where eligible, renewables.
- You do not need to wait for the Warm Homes Plan — ECO4 support is available now.
The Update
What Does the ECO4 Extension to December 2026 Mean?
Original end date
31 March 2026
Extended deadline
31 December 2026
The ECO4 extension means eligible UK households now have additional time to access support for energy efficiency improvements until 31 December 2026. The scheme continues to support measures such as insulation upgrades, heating improvements, and other retrofit solutions designed to reduce energy costs and improve home performance.
While the extension provides more time, eligibility requirements still apply. Homeowners may need to meet specific criteria related to household circumstances, property energy efficiency, and available funding routes. LAMTANS Engineering helps homeowners understand ECO4 requirements and identify suitable improvement options across the UK.
The Scheme
What Is ECO4
ECO4 (Energy Company Obligation Phase 4) is a UK government-backed energy efficiency scheme that requires obligated energy suppliers to support eligible households with home improvements that reduce energy consumption and improve heating performance.
Loft and wall insulation are among the most common ECO4-funded measures.
The scheme focuses on improving inefficient properties through measures such as:
- Loft insulation
- Cavity wall insulation
- Internal wall insulation (IWI)
- External wall insulation (EWI)
- Flat roof and pitched roof insulation
- Underfloor and solid floor insulation
- Park home insulation
- First-time central heating systems
- Heating controls and energy efficiency upgrades
- Air source heat pumps (where eligible)
- Solar PV installations (where eligible)
Standards: all ECO4-funded retrofit projects must follow approved installation requirements, including PAS2035 retrofit standards and delivery through appropriately certified installers.
LAMTANS Engineering helps homeowners understand available ECO4 measures, eligibility requirements, and suitable energy efficiency improvements across the UK.
Complete Guide: Government Grants UK →Eligibility
Who Qualifies for ECO4? Eligibility Criteria Explained
Eligibility for ECO4 depends on household circumstances, property condition, and the specific funding route available. The scheme is mainly designed to support low-income households, vulnerable residents, and homes requiring significant energy efficiency improvements.
Heating upgrades and controls are funded alongside insulation for eligible homes.
ECO4 Eligibility Through Benefits
You may be eligible for ECO4 support if you receive qualifying benefits, including:
- Universal Credit
- Pension Credit (Guarantee Credit or Savings Credit)
- Income Support
- Income-based Jobseeker's Allowance (JSA)
- Income-related Employment and Support Allowance (ESA)
- Working Tax Credit
- Child Tax Credit
- Child Benefit (subject to income thresholds)
- Housing Benefit
ECO4 Eligibility Through ECO4 Flex and Property Criteria
Some households may also qualify through alternative routes, such as ECO4 Flex, where local authorities can identify eligible households based on factors including:
- Low household income
- Vulnerability to living in a cold home
- Health-related risks
- Poor energy efficiency performance
Properties with lower EPC ratings (typically D–G) may be considered for support, subject to meeting ECO4 eligibility requirements.
LAMTANS Engineering helps homeowners understand their ECO4 eligibility options and identify suitable energy efficiency improvements through professional retrofit guidance and assessments.
ECO4 Eligibility Check – Free Assessment →Eligibility
Who Qualifies for ECO4? Eligibility Criteria Explained
Eligibility for ECO4 depends on household circumstances, property condition, and the specific funding route available. The scheme is mainly designed to support low-income households, vulnerable residents, and homes requiring significant energy efficiency improvements.
Heating upgrades and controls are funded alongside insulation for eligible homes.
ECO4 Eligibility Through Benefits
You may be eligible for ECO4 support if you receive qualifying benefits, including:
- Universal Credit
- Pension Credit (Guarantee Credit or Savings Credit)
- Income Support
- Income-based Jobseeker's Allowance (JSA)
- Income-related Employment and Support Allowance (ESA)
- Working Tax Credit
- Child Tax Credit
- Child Benefit (subject to income thresholds)
- Housing Benefit
ECO4 Eligibility Through ECO4 Flex and Property Criteria
Some households may also qualify through alternative routes, such as ECO4 Flex, where local authorities can identify eligible households based on factors including:
- Low household income
- Vulnerability to living in a cold home
- Health-related risks
- Poor energy efficiency performance
Properties with lower EPC ratings (typically D–G) may be considered for support, subject to meeting ECO4 eligibility requirements.
LAMTANS Engineering helps homeowners understand their ECO4 eligibility options and identify suitable energy efficiency improvements through professional retrofit guidance and assessments.
ECO4 Eligibility Check – Free Assessment →Looking Ahead
What Is the Warm Homes Plan?
The Warm Homes Plan is a UK government-backed programme designed to support households with energy efficiency improvements, helping improve home comfort, reduce energy bills, and accelerate the transition towards cleaner heating solutions.
The programme is expected to provide long-term support for home upgrades from 2026 onwards, building on existing energy efficiency initiatives and helping more households access retrofit improvements.
Millions of UK homes are expected to be upgraded under the Warm Homes Plan.
Key Warm Homes Plan facts:
£15 billion
Government investment planned for home energy improvements
2026–2030
Expected delivery period
~5 million homes
Aims to improve energy efficiency across approximately 5 million homes
Fuel poverty
Designed to help reduce fuel poverty and improve household energy performance
Green jobs
Expected to support thousands of green jobs across the UK retrofit sector
What Homeowners Should Do Now
Don't wait: if your property requires insulation, heating upgrades, or renewable energy improvements, you do not need to wait for the Warm Homes Plan. Existing support schemes, including ECO4, remain available until 31 December 2026 for eligible households.
LAMTANS Engineering helps homeowners across the UK understand available funding routes and prepare suitable retrofit improvements, including insulation, heating upgrades, and renewable energy solutions.
Register for Warm Homes Plan Updates →Working With Us
How LAMTANS Engineering Can Help
LAMTANS Engineering helps homeowners across the UK understand available funding routes and complete energy efficiency improvements through trusted retrofit solutions. As a TrustMark registered, RECC accredited and PAS2035 compliant installer — fully industry accredited — we provide professional guidance from eligibility checks through to installation.
We can help you:
- Check your eligibility for ECO4, Warm Homes Plan, and BUS Scheme support
- Understand available funding options and suitable retrofit measures
- Plan compliant energy improvements based on your property needs
- Install approved measures including insulation, heat pumps, solar panels, and other efficiency upgrades
Based in Manchester, we support homeowners across the UK with high-quality retrofit installations designed to improve comfort, reduce energy waste, and enhance home efficiency.
Common Questions
Frequently Asked Questions
What is the new deadline for ECO4?
31 December 2026 (extended from 31 March 2026).
Do I need to pay anything back?
No. ECO4 is not a loan. There is nothing to repay.
What if I don't qualify for ECO4?
You may qualify for the Warm Homes: Local Grant (typically for household incomes under £36,000) or the Warm Homes Plan (from 2026). Contact us for a free check of all schemes.
How long does the ECO4 process take?
From initial contact to installation is typically 4–8 weeks.
Is LAMTANS TrustMark registered?
Yes. We are TrustMark Registered, RECC Accredited and PAS2035 Compliant, and we are fully industry accredited — you can verify every membership on our accreditations page.
Free Assessment
Get Your Free ECO4 Eligibility Check Today
Check your ECO4 eligibility today — contact LAMTANS Engineering for a free assessment. Not sure if you qualify? Contact us for a free consultation — we check ECO4, the Warm Homes Plan and the BUS Scheme for you, and confirm your options within 72 hours following your free survey.
Free assessment · All grant routes checked · ECO4 open until 31 December 2026