ECO4 Has Been Extended: What Does This Mean for Green Skills and Retrofit Delivery?

The UK’s journey to net zero has always depended on more than policy announcements. It relies on the people, skills and supply chains needed to turn ambition into practical improvements across homes and buildings.

That is why the future of the Energy Company Obligation scheme, commonly known as ECO, is such an important moment for the retrofit and energy efficiency sector.

According to Ofgem, ECO4 applies to measures installed from 1 April 2022 and will now run until 31 December 2026, following a nine-month extension. Ofgem describes ECO as a government energy efficiency scheme in Great Britain designed to tackle fuel poverty and help reduce carbon emissions.

While this does not mean that net zero funding is disappearing altogether, it does show that the funding landscape is still shifting. The key question now is whether the industry has enough certainty, confidence and skills to keep retrofit delivery moving.

What is happening to ECO4?

The Energy Company Obligation has been one of the UK’s main schemes for improving the energy efficiency of domestic properties, particularly for households most at risk of fuel poverty.

Under ECO4, eligible homes can receive support for measures such as insulation, heating upgrades and other improvements designed to make properties warmer, cheaper to run and more energy efficient.

Ofgem confirms that the scheme works by placing a Home Heating Cost Reduction Obligation on medium and large energy suppliers. These suppliers must promote measures that improve the ability of low-income, fuel-poor and vulnerable households to heat their homes, including actions that reduce energy use, such as installing insulation or upgrading a heating system.

The important update is that ECO4 is no longer simply due to finish in March 2026. It has now been extended to 31 December 2026.

This is not just an administrative detail. ECO has helped create demand for retrofit work, supported supply chain confidence and given many businesses a clearer route into delivering energy efficiency improvements. When a long-running funding mechanism changes, ends or is extended, the effects can be felt across the entire sector.

Is net zero funding disappearing?

It would be too simplistic to say that net zero funding is disappearing completely. A more accurate way to describe the situation is that one of the main long-running funding routes for domestic energy efficiency has been extended, while the sector continues to prepare for the next phase of government-backed support.

The concern is not necessarily that support for energy efficiency and retrofit has ended. The concern is whether the transition between ECO4 and future schemes will be clear, smooth and fast enough to maintain momentum.

Elmhurst Energy has highlighted the importance of the Warm Homes Plan and the need for clarity around future retrofit delivery. For the industry, this creates a practical issue. Businesses need confidence to invest in staff, training, equipment and long-term planning.

If funding routes change without enough clarity, some organisations may delay recruitment, reduce investment or step back from retrofit work altogether. Even with an extension, the sector still needs to understand what happens next.

That is where the green skills challenge becomes critical.

Why the ECO4 extension matters for green skills

Green skills are often discussed in broad terms, but in practice they cover a wide range of roles and responsibilities.

The UK needs people who can assess properties accurately, understand building performance, advise on suitable improvements, install measures correctly and ensure work is completed to the right standards.

This includes skills linked to:

• Energy assessment and EPCs
• Retrofit assessment and coordination
• Insulation and building fabric improvements
• Heating system upgrades
• Solar PV and battery storage
• Ventilation and moisture control
• Heat pump readiness
• Compliance, quality assurance and building performance

The success of any net zero policy depends on these skills being available at the right time and in the right places.

The ECO4 extension may provide some extra time, but it does not remove the need to build and maintain a skilled retrofit workforce. If the industry waits until future schemes are fully confirmed before investing in skills, there is a risk that demand could outpace capacity.

The risk of a retrofit stop-start cycle

One of the biggest risks for the energy efficiency sector is a stop-start approach to funding.

When schemes are launched, changed, extended, paused or withdrawn, businesses can find it difficult to plan ahead. This can affect everything from recruitment and training to stock, investment and customer confidence.

For homeowners, landlords and housing providers, unclear funding routes can also make it harder to decide when to act. If people are unsure what support will be available, they may delay improvements until the position becomes clearer.

That matters because retrofit is not usually a quick, single-step process. Good retrofit starts with understanding the building. Different properties need different solutions, and poor planning can lead to poor outcomes.

The sector needs stable demand, skilled professionals and strong quality standards. Without these, there is a risk that funding changes could slow progress at the very point when the UK needs to accelerate delivery.

Warm Homes Plan: the next phase of delivery

The Government’s Warm Homes Plan is expected to play a major role in the next stage of energy efficiency and low-carbon home upgrades.

The ECO4 extension gives the sector a longer delivery window than previously expected, but it does not remove the need for clarity around what comes after it. Businesses, assessors, installers, landlords and housing providers will all need to understand how future funding routes will work, who will be eligible and what standards will apply.

This is particularly important because the energy efficiency sector does not operate in isolation. EPC reform, rental standards, fuel poverty targets, carbon reduction commitments and retrofit funding are all connected.

The Warm Homes Plan may provide significant opportunities, but the industry will need detail. Property professionals, assessors, installers and those working across the wider retrofit supply chain will all need to understand how future schemes will work and what skills will be required.

Quality matters as much as quantity

The shift from ECO4 to future retrofit funding should not just be about how many homes can be upgraded. It should also be about how well those upgrades are delivered.

Ofgem’s ECO page confirms that TrustMark oversees the quality assurance of retrofits to both technical and consumer protection standards, and that Ofgem uses data shared by TrustMark to check compliance against scheme rules.

This reinforces a key point: retrofit cannot simply be treated as a numbers game.

Poorly installed measures can lead to problems such as damp, condensation, poor ventilation, performance gaps and reduced customer confidence. In some cases, inappropriate measures can make a building less comfortable or create new issues that did not exist before.

That is why green skills must include more than installation knowledge. The sector also needs strong assessment skills, understanding of building fabric, awareness of ventilation, and the ability to make property-specific recommendations.

What does this mean for landlords and property owners?

For landlords and property owners, the changing funding landscape is another reminder that energy efficiency is becoming a long-term property issue, not a short-term compliance task.

EPCs, rental standards, energy bills and retrofit funding are all moving in the same direction. Buildings are expected to become more efficient, less reliant on fossil fuels and better prepared for future regulation.

Even where funding is uncertain, property owners can still take practical steps now. These include understanding the current energy performance of their building, reviewing EPC recommendations, identifying practical improvement options and keeping up to date with changes to funding and compliance requirements.

Waiting until deadlines are closer can make improvements more expensive and harder to organise, especially if demand for skilled assessors and installers increases.

What does this mean for employers and the retrofit sector?

For employers working in construction, property, housing, energy assessment or building services, the ECO4 extension should be seen as a signal to review future skills needs.

The sector is likely to keep moving towards retrofit, energy efficiency and low-carbon upgrades. However, businesses that wait for perfect certainty may find themselves behind when demand increases again.

Investing in green skills now can help organisations prepare for future opportunities, whether these come through ECO4, the Warm Homes Plan, local authority schemes, social housing programmes, private landlord requirements or commercial demand for lower-energy buildings.

The businesses that are best prepared will be those that understand both the technical and practical sides of retrofit.

Green skills cannot be left in limbo

The extension of ECO4 to December 2026 is an important update for the UK retrofit sector. It provides a longer window for delivery, but it should not be seen as a reason to delay planning for the future.

The bigger issue is whether the sector can maintain confidence, invest in people and build the workforce needed to deliver the next phase of energy efficiency improvements.

Net zero targets will not be met by funding announcements alone. They will be delivered by trained, competent people working across homes, buildings and communities.

If the UK is serious about warmer homes, lower bills and lower carbon emissions, green skills must remain at the centre of the conversation.

How Essential Green Skills can help

Essential Green Skills supports landlords, property owners, housing providers and businesses with professional energy assessment services to help them understand the current performance of their buildings and identify practical routes for improvement.

As ECO4, EPC requirements, retrofit funding and wider energy efficiency expectations continue to evolve, accurate property assessments will play an important role in helping organisations make informed decisions. Whether you need to understand your current EPC rating, plan future improvements or review compliance requirements, having reliable assessment data is a sensible starting point.

Our team can help you assess your property, understand the results and consider the next steps needed to improve energy performance, reduce carbon emissions and prepare for future changes in the energy efficiency landscape.

To find out more, contact Essential Green Skills for support with energy assessments and property energy efficiency services.