ECO4 Grants

What to know first

Here are the main points to understand before you explore ECO4 support.

Could ECO4 support work for my home?

A few indicators can show whether ECO4 is worth exploring, but they do not confirm a result. Only a property-specific assessment can establish the design, likely performance, permissions and suitability of proposed work. The energy supplier must also decide whether it will support the project under its current obligation and delivery arrangements.

Introduction

ECO4 is the fourth phase of the Energy Company Obligation. It requires larger energy suppliers to support energy-efficiency and heating improvements in eligible homes. The scheme is designed to reduce fuel poverty and improve some of the least efficient housing in Great Britain. An Energy Performance Certificate (EPC) is an important starting point for many property checks.

People often call the support an ECO4 grant. That is useful shorthand, but it can create the wrong expectation. ECO4 is not a fixed government cash award that an eligible household can claim. Suppliers decide how to meet their legal targets, which projects to support and how much funding to offer. A household can meet an entry route and still receive no offer.

The current phase applies in England, Scotland and Wales. It does not apply in Northern Ireland. Following a 2026 extension, ECO4 is due to run until 31 December 2026. Suppliers and delivery partners may stop accepting new enquiries earlier if there is not enough time to assess, design, install and notify the work.

Who is this guide for?

This guide is for homeowners, private tenants, social tenants and landlords in Great Britain who want to understand how ECO4 works. It is also useful if a council, supplier, installer or marketing company has contacted you about funded home improvements.

You do not need to use a Clearwise introduction to use this guide. You can approach an obligated energy supplier, check whether your council participates in ECO4 Flex, or use the official support routes listed later. Landlord permission, occupancy and property rules may affect the route that applies.

What this guide covers

The guide explains:

• The possible benefits and limits of ECO4-funded improvements.

• The household, benefit, Flex, tenure and EPC factors that matter.

• The types of insulation, heating and renewable measures that may be considered.

• How an enquiry, assessment, offer, installation and handover may work.

• How to check TrustMark registration and other relevant credentials.

• How supplier funding, household contributions and other schemes interact.

• The current scheme deadline and why project timelines can differ.

• Common sales, quality, contract and verification problems to watch for.

• Where to find official information, consumer help and complaint routes.

This is general consumer information. It cannot confirm whether your household or home qualifies, specify a retrofit design, estimate savings for your property or decide which permissions are needed. Those questions depend on current rules, evidence, the building and the organisations involved.

Benefits of ECO4

The main potential benefit of ECO4 is access to improvements that a household might otherwise struggle to fund. The right package may make a home easier to heat, reduce avoidable heat loss, replace an inefficient or broken heating system, or improve how heating is controlled.

The result is not the same for every property. A measure that performs well in one home may be unsuitable in another because of construction, damp, ventilation, exposure, occupancy or the existing heating system. Energy-bill changes also depend on tariffs, weather, how warm the home is kept and whether residents use the improved comfort to heat more rooms.

What could the household gain?

How does ECO4 fit national policy?

ECO4 is set by government policy and legislation. The Department for Energy Security and Net Zero is responsible for the policy framework. Ofgem administers the scheme, monitors supplier compliance and publishes delivery guidance. Energy suppliers meet household heating cost reduction obligations according to their share of the market.

TrustMark has a separate quality-assurance role for most ECO4 work. Retrofit projects are generally expected to follow the current Publicly Available Specification (PAS) 2035 process, with installation standards under PAS 2030 where applicable. These roles matter because a supplier, installer, assessor, coordinator and scheme administrator do not make the same decisions or owe the same responsibilities.

Balancing immediate and longer-term gains

Some benefits can be felt quickly. Draughts may be reduced, heating controls may be easier to use or a failing heating system may become more reliable. Other benefits build over several heating seasons and can be difficult to separate from changes in prices, weather and household behaviour.

Longer-term value depends on workmanship and maintenance as well as the original measure. Insulation must be compatible with the building and supported by adequate ventilation. Heating equipment may need servicing. Guarantees can be valuable, but they have conditions, exclusions and claim procedures that should be understood before work starts.

Is the work always cost-effective?

ECO4 uses scheme scoring and project rules to help suppliers decide how measures contribute towards their obligations. That does not mean every funded project has the same financial return for the resident. The amount of supplier funding, any household contribution, future maintenance and the lifespan of the work all matter.

Before agreeing to contribute, ask for a written breakdown of the measures, the supplier-funded amount, your payment, any finance, enabling work and exclusions. Compare the proposed benefits with the disruption, future responsibilities and alternatives. Do not rely on a verbal payback estimate or a headline claim that the work will add a particular amount to the property value.

Eligibility criteria

ECO4 eligibility is not one yes-or-no rule. In practice, four things need to work together: the property must fit the scheme, the household or referral must provide an accepted route, the proposed measures must form a compliant project and an obligated supplier must choose to fund it.

The details below describe the current broad position. Ofgem guidance, legislation, supplier delivery rules and local Flex arrangements can change. Documents should be checked against the current rules at the time the project is assessed.

Basic eligibility factors

1. Check the home and tenure. Owner-occupied, privately rented and social homes are treated differently, and landlord or owner permission may be required.

2. Check the EPC starting point. Current consumer guidance broadly focuses on owner-occupied homes rated D to G and rented or social homes rated E to G, subject to detailed scheme rules.

3. Check the household route. This may be an eligible benefit, an ECO4 Flex declaration or another route allowed by the current order and delivery guidance.

4. Check the proposed project. A retrofit assessment and design must identify measures that comply with ECO4 and the applicable technical standards.

5. Check supplier support. Meeting the rules does not compel a supplier to make an offer or cover the full cost.

Which benefits are currently listed?

Under the current ECO4 Home Heating Cost Reduction Obligation route, the listed benefits include Universal Credit, Pension Credit Guarantee Credit, Pension Credit Savings Credit, Income Support, income-based Jobseeker’s Allowance, income-related Employment and Support Allowance, Housing Benefit and Child Benefit.

Child Benefit has additional household-income limits. The limits depend on whether the claimant is single or part of a couple and on the number of qualifying children. The current figures in Ofgem’s 2026 delivery guidance are shown below. They are gross annual household-income caps and should be checked again before an application is relied upon.

What is ECO4 Flex?

ECO4 Flex is an alternative referral route for some households that do not receive a listed benefit. Participating local authorities and devolved administrations can identify households under approved routes. Current guidance includes a low-income route with gross household income below £31,000, proxy-based routes and a route linked to certain health vulnerabilities made worse by living in a cold home.

A council declaration is not a funding award. The council identifies or refers a household under the Flex rules, while an energy supplier still decides whether to support the project. Not every council participates, local statements of intent differ and a supplier may have its own delivery capacity and evidence checks.

How do tenure and EPC ratings matter?

A current EPC can provide a useful starting point, but the certificate is not the retrofit design. It is a modelled assessment of the property’s energy performance. The retrofit assessment should look more closely at the building, occupancy, condition, ventilation, heating and risks.

Private tenants normally need the property owner’s permission for work. Landlords should understand the contract, guarantees, future maintenance and any effect on the tenancy. Social landlords may have separate procurement and programme arrangements. Leaseholders may also need freeholder, managing-agent or planning consent, depending on the measure and building.

Steps to confirm the current position

1. Find the existing EPC or ask the provider which rating evidence it will use.

2. Check the current benefit list or your council’s published ECO4 Flex statement.

3. Ask which obligated energy supplier would fund the project.

4. Confirm who will assess, coordinate, design and install the measures.

5. Read the written offer and do not treat a marketing eligibility check as approval.

Do not send full identity, benefit or health records to an unknown caller. Ask for the organisation’s name, privacy notice, supplier relationship and TrustMark details first. Official supplier and council contact routes can help you verify an approach.

Types of measures

ECO4 is not a catalogue from which every eligible household can choose any product. The measures depend on the starting condition of the home, the scheme route, the retrofit assessment, technical standards, supplier policy and the package needed to meet ECO4 requirements.

The scheme places strong emphasis on a whole-house and fabric-first approach. In simple terms, the team should understand how the home loses heat and manages moisture before adding or changing heating technology. Individual measures should work together rather than create new condensation, ventilation or comfort problems.

Common measures that may be considered

Why does the whole-house approach matter?

Homes behave as systems. Insulating walls can change surface temperatures and moisture movement. Replacing a boiler or installing a heat pump changes heat output, controls and sometimes hot-water arrangements. Improving airtightness without providing appropriate ventilation can increase indoor-air-quality and condensation risks.

The PAS 2035 process is intended to manage these interactions. A retrofit assessment records the building and household context. A retrofit coordinator oversees the process and risk pathway. Designers and installers then work to the relevant standards. The exact roles and documents vary with the project.

How are measures tailored to the home?

A solid-wall terrace, a cavity-wall semi-detached home and a system-built flat may need very different approaches. Even homes that look alike can have extensions, previous insulation, damp, altered ventilation or roof defects that change the design. The assessment should identify these differences rather than rely only on age or property type.

The household also matters. Occupancy, room use, health needs, heating patterns and the ability to operate new controls can affect the design. This does not mean the resident chooses any preferred product. It means the project should consider how the building is actually used and whether residents can use and maintain the proposed system safely.

What repairs or permissions may be needed?

Defects can prevent or delay retrofit. Active leaks, structural problems, unsafe electrics, asbestos, defective roofs, severe damp or blocked ventilation may need investigation or repair. Ask in writing whether preparatory work is included in ECO4 funding, charged separately or excluded from the contract.

Some work can also need planning permission, listed-building consent, landlord or freeholder consent, building-control approval, a network connection process or other permissions. The requirements vary by nation, property and measure. A provider should not promise that no permission is needed without checking the relevant conditions.

What about estimated savings?

The assessment may include modelled energy and carbon effects. These are useful for comparing a baseline and a proposed package, but they are not a promise about future bills. The model uses assumptions about the building and standardised occupancy that may differ from the way the household heats and uses the home.

Ask whether a figure represents modelled energy use, a scheme score, a carbon reduction or an estimated cash saving. A cash estimate should state the energy prices, weather assumptions, old system, new system and usage pattern. Without those details, it is difficult to judge what the number means.

How to apply

There is no single GOV.UK application form that guarantees an ECO4 award. Households normally begin with an energy supplier, a participating local authority for ECO4 Flex, or an organisation delivering work for a supplier. Any obligated supplier can potentially support a household; it does not have to be the supplier that currently provides your gas or electricity.

Installers and lead-generation companies may offer an initial check. Treat this as an enquiry, not approval. Ask which supplier is behind the project, who holds your data and which organisation would contract with you. A company using the ECO4 name is not automatically part of an authorised delivery chain.

Preliminary checks

1. Check that the property is in England, Scotland or Wales and is used as a domestic home.

2. Find the EPC and note the tenure, main heating system and any known defects.

3. Check the current benefit route or the local ECO4 Flex statement of intent.

4. Use official contact details to verify the supplier, council or provider.

5. Ask what personal documents are needed and read the privacy notice before sending them.

Finding an appropriate provider

You can contact an obligated supplier directly using its published ECO details. A supplier may refer you to a delivery partner or say it is not accepting projects of that type. Councils that participate in ECO4 Flex should publish information about their declaration process, but they do not usually install or fund the work themselves.

Where a provider approaches you, check the legal business name, address, company number, TrustMark registration for the relevant measure and the proposed supplier relationship. Search the official TrustMark register rather than relying on a badge in a brochure. For specialist work, check the relevant MCS, Gas Safe or electrical register as well.

Completing the evidence checks

The organisation may request evidence of a listed benefit, Child Benefit income, identity, address, ownership, tenancy or landlord consent. An ECO4 Flex route may involve income, proxy or health-related evidence. Only provide information that is necessary for the stated route and use a secure channel.

Ask who will receive the information, how long it will be kept, whether it will be shared with suppliers or subcontractors and how consent can be withdrawn. A provider should be able to give a privacy notice. Be cautious if a caller pressures you to send bank statements, benefit letters or medical evidence before you can verify the organisation.

Assessment and proposed design

If the initial checks support a possible route, the provider may arrange a retrofit assessment. The assessment is more detailed than an online form or EPC lookup. It should gather information about the building condition, construction, occupancy, ventilation, heating and energy use.

The project team then develops a plan. You should be told which measures are proposed, why they are appropriate, what standards apply, what disruption is expected and what must happen before installation. Ask for copies of the assessment or relevant consumer-facing outputs and raise inaccuracies before signing.

Receiving and reviewing the offer

The written offer should identify the contracting business, the measures, price, ECO4 funding, any household contribution, payment schedule, planned dates, subcontractors, guarantees, insurance, complaints route and work excluded. Do not sign a blank form or rely on changes made only in a phone call.

Check whether scaffolding, surveys, electrical upgrades, decorating, asbestos work, repairs, planning applications, temporary heating and making good are included. Ask what happens if the assessment changes, the supplier withdraws funding, hidden defects are found or the project cannot be completed before the scheme deadline.

Installation and handover

Before work begins, agree access, working hours, protection of belongings, welfare arrangements, dust control, temporary loss of heating or hot water and who to contact on site. Take dated photographs of the relevant areas and record existing damage. This can help if the finished work is disputed.

At handover, ask for operating instructions, warranties, guarantees, compliance certificates, commissioning records, ventilation information, maintenance requirements and emergency contacts. Check that controls are explained in a way the household can use. Do not sign a completion statement that you do not understand or that records work you believe is unfinished.

Accredited installers

The phrase accredited installer is widely used, but it is not a single legal status. Different parts of an ECO4 project can involve TrustMark registration, PAS certification, MCS certification, Gas Safe registration, electrical competence schemes, manufacturer approval and professional qualifications. Each applies to a different role or type of work.

Most installers carrying out ECO4 measures must be registered with TrustMark for the relevant measure. A narrow exception can apply to certain district-heating work. TrustMark registration helps connect the business to scheme requirements and a complaints framework, but it is not a guarantee that every job will be problem-free.

Why do the different credentials matter?

Tips for checking a provider

• Search the official register using the legal business name or registration number.

• Check that the measure category matches the work proposed for your home.

• Ask which business will sign the contract and which businesses will subcontract.

• Request a detailed scope, price, funding breakdown and list of exclusions.

• Read guarantee conditions, claim routes and any insurance-backed protection.

• Check recent company details and avoid paying an unverified personal account.

• Ask which supplier is funding the project and verify that relationship where possible.

• Keep copies of advertisements and messages that influenced your decision.

Communication and planning

A good consumer journey should make the roles clear. Ask for the contact details of the retrofit assessor, coordinator, designer, installer and contract manager where these roles exist. Find out who can approve changes and who is responsible for damage, complaints and remedial work.

Tell the project team about access needs, disability, health-related temperature needs, pets, caring responsibilities and times when the home cannot be without heating. This information can affect scheduling and temporary arrangements. It should not be used to pressure the household into a quick decision.

During installation

The installed work should match the agreed design and product specification unless a documented variation is approved. Ask before accepting substitutions. If the team uncovers damp, unsafe wiring, structural defects or asbestos, work may need to stop while the issue is assessed.

Keep a daily note of attendance, changes, damage and conversations. Photograph concealed work where safe and with the installer’s agreement. Do not enter unsafe work areas or attempt to inspect gas, electrical, roof or structural work yourself.

Post-installation checks and follow-up

Walk through the work before final sign-off. Check visible finishes, controls, ventilation points, access panels and areas where services enter the building. Ask the installer to demonstrate the heating or control system and explain what normal operation, maintenance and warning signs look like.

If something appears wrong, report it in writing as soon as possible and keep photographs. Follow the business’s complaint route first. If it is not resolved, the TrustMark process normally moves from the registered business to its scheme provider and may then reach the independent dispute-resolution route, subject to the scheme conditions.

Funding levels and limits

There is no standard ECO4 cheque or published household grant amount. Suppliers receive obligations measured through scheme rules and decide which projects to support. The funding offered can vary with the property, measures, delivery costs, scheme score, supplier targets and the agreements between organisations in the supply chain.

A supplier may fund the full contracted cost, fund part of it or decide not to proceed. A household contribution is permitted in some projects. Eligibility language in an advertisement does not create a legal entitlement to free work, and the word grant should not be read as a promise that every associated cost is covered.

How is an offer worked out?

The provider should translate the scheme calculation into a clear consumer offer. You do not need to understand every technical score, but you should be able to see the total price, the ECO4-funded amount, your contribution, any separate finance and which party receives each payment.

The offer should also explain what happens if costs change. A fixed-price contract, a provisional sum and a quote subject to survey carry different risks. Ask whether hidden defects, planning conditions, network work or required repairs can increase your contribution or cancel the project.

Potential out-of-pocket costs

• A stated household contribution towards the approved measures.

• Repairs or defect investigations outside the ECO4 scope.

• Planning, listed-building, leasehold or freeholder costs.

• Decoration or making good that the contract excludes.

• Maintenance, servicing and replacement after guarantees end.

• Energy use changes associated with a new heating system.

• Cancellation costs where the contract and consumer law allow them.

Do not pay a deposit or contribution until the contract identifies the legal business, purpose of the payment and refund conditions. Avoid cash or transfers to a personal account. If credit is offered, check who the lender or broker is, whether it is authorised where required, the total amount repayable and what happens if the installation is disputed.

Can ECO4 be combined with other support?

Current Ofgem rules restrict the use of specified public funding in the same ECO4 project. A household should not assume that ECO4 can simply be stacked with a council grant, Warm Homes programme or another government scheme to pay for the same package. Project boundaries and timing matter.

Separate support may sometimes fund different work before or after the whole ECO4 project, but this must be checked with the relevant scheme administrators before contracts are signed. Using public funding incorrectly can make a measure ineligible or create repayment and delivery problems for the organisations involved.

How can I compare offers?

Compare like with like. One offer may include ventilation, scaffolding, electrical upgrades and making good, while another may show a lower contribution because these items are excluded. Ask for the product and system specifications where they matter, but do not choose on a headline efficiency figure alone.

Independent consumer help can be useful if the funding explanation is unclear. Citizens Advice can explain consumer rights and contract issues. Energy Saving Trust services can provide general home-energy information, with different routes for England, Scotland and Wales. Neither organisation can require a supplier to fund an ECO4 project.

Key deadlines

ECO4 was extended in 2026 and is now due to end on 31 December 2026. The extension gives suppliers more time to complete their existing obligations. It does not create an unlimited application window for households or guarantee that a project started late in the year can be installed and notified in time.

A supplier, council or delivery partner may set an earlier intake date. Complex projects can need surveys, design, planning, landlord consent, network work, materials and remediation before installation. The practical deadline for a particular home can therefore be much earlier than the legal end of the scheme.

Overall scheme duration

The statutory scheme period now runs to the end of 31 December 2026 in Great Britain. The government’s extension decision did not increase the overall targets and did not establish a new supplier obligation to follow automatically after ECO4. Other Warm Homes programmes are separate policy and funding routes.

A future announcement should not be treated as live support until the responsible body publishes final rules, dates, territory and an application route. Likewise, older webpages that still show March 2026 as the ECO4 end date are out of date.

Supplier-led deadlines

Suppliers manage delivery pipelines against their obligations. They may prioritise certain measures, regions or delivery partners and may close routes when targets or budgets are committed. An installer cannot guarantee that a supplier will accept a measure merely because an assessment has taken place.

Ask for the latest realistic timetable and what milestone must be reached by which date. Useful milestones include evidence approval, retrofit assessment, design sign-off, contract, permission, installation, commissioning and final notification. A vague statement that funding is ending soon is not enough reason to sign immediately.

Typical application timeline

Some straightforward projects can move quickly, while others take months. Delays can arise from missing evidence, landlord consent, assessor availability, product lead times, weather, scaffolding, planning, distribution-network requirements or the need to repair the building first.

Do not allow a deadline to justify skipping a necessary assessment or accepting unsafe work. A project that cannot be designed and delivered properly before the scheme end may need a different route. The provider should explain that risk rather than promising that paperwork alone secures the funding.

Planning ahead

• Verify the provider and supplier relationship before sharing sensitive evidence.

• Gather benefit, tenure and permission documents without sending originals by post.

• Raise damp, roof, structural, electrical and access issues at the assessment.

• Ask for a written critical path and a named contact for delays.

• Keep alternatives open until the supplier offer and contract are clear.

Extensions and revisions

The ECO framework has changed several times, and delivery guidance is updated when legislation or administration changes. Use the latest version shown on Ofgem’s ECO pages. A cached copy, old installer leaflet or previous phase of ECO may contain rules that no longer apply.

The scheme end date is material, but it should be communicated calmly. Be cautious of messages claiming that you must sign today, that a grant slot has been reserved without evidence, or that a government official will withdraw support unless you provide bank details.

Common pitfalls

ECO4 combines public rules with private contracts and a long delivery chain. Many problems start when those parts are blurred. A household may believe a marketing company is the supplier, an eligibility check is an award, TrustMark registration guarantees the work or a free offer covers every associated cost.

The checks below can reduce risk, but they cannot remove it. Keep a written record and use official contact details when something does not match the offer.

Treating a preliminary check as approval

An online calculator or phone questionnaire may show that a route is worth exploring. It cannot confirm the EPC evidence, property condition, compliant measures, supplier decision or final contract. Avoid making financial commitments or cancelling other work on the strength of a preliminary result.

Assuming free means no possible cost

Some ECO4 projects have no household contribution, but free should be tested against the full scope. Ask about repairs, scaffolding, planning, electrical work, decorating, temporary accommodation, servicing and future maintenance. All charges and exclusions should be in writing.

Responding to an unverified cold caller

ECO4 is sometimes used in misleading calls, doorstep sales and online adverts. A caller may know your address or EPC rating without being connected to a supplier. Verify the organisation independently. Energy Saving Trust says it does not cold call to offer home improvements.

Do not share one-time passcodes, online banking details or identity documents to prove eligibility. Do not let a caller remote-control your device. If you suspect fraud, contact your bank where relevant and use the official reporting route for your nation.

Signing before the design is clear

A contract signed too early can leave uncertainty about products, ventilation, enabling work, contributions and completion standards. Ask whether the document is an expression of interest, survey authority, funding consent or binding installation contract. Each has a different effect.

Ignoring damp, ventilation or defects

Insulation should not be used to cover unresolved leaks, severe damp or structural defects. The project should assess moisture and ventilation. If the provider says a defect is outside the ECO4 scope, obtain a clear explanation of what must be done and whether the project will remain available afterwards.

Accepting guaranteed savings

No provider can know future energy prices, weather and household behaviour. Modelled savings can be helpful only when assumptions are shown. Ask for the estimated energy reduction and the basis of any cash conversion. Treat a guaranteed bill reduction or property-value increase as a warning sign.

Overlooking funding interactions

Do not apply separate public funding to the same ECO4 project without checking the rules. Tell each scheme administrator about other support. A provider that suggests splitting invoices or dates to conceal double funding may put the project at risk.

Losing records after installation

Keep the assessment, design summary, contract, invoices, contribution receipts, product details, photographs, commissioning records, guarantees, certificates and complaint correspondence. Digital copies are useful if the provider later closes or documents are lost.

What if wall insulation may be poor quality?

The government has published a dedicated route for households concerned about some external or internal wall insulation installed under ECO4 or the Great British Insulation Scheme. TrustMark has also publicised a free Find and Fix audit offer for relevant external wall insulation properties.

Use the official GOV.UK and TrustMark pages to verify the process and any unique measure reference number. A legitimate scheme audit should not require you to pay a cold caller. If faults are identified through the official process, the responsible installation business may be required to put them right without charging the household, subject to the scheme and case details.

The verification process

Verification is the collection and checking of evidence that allows a measure to count towards a supplier’s ECO4 obligation. It can include household eligibility, EPC and property information, the retrofit process, technical installation records, photographs, commissioning data and TrustMark lodgement.

Verification is not a single visit and it is not the same as a guarantee. Some checks happen before the work, some at handover and some through later desk audits or site monitoring. Ofgem can reject measures from supplier reporting where rules are not met, while the household’s contract and consumer remedies follow separate routes.

What is checked before work starts?

• The household route, such as a listed benefit or Flex declaration.

• The property’s tenure, EPC position and owner or landlord consent.

• The retrofit assessment, risks and proposed package of measures.

• The businesses, certifications and scheme registrations involved.

• The funding offer, household contribution and interaction with other support.

• Relevant planning, building, network and specialist-work requirements.

Who may be involved?

The retrofit assessor gathers information about the home. The retrofit coordinator manages the PAS 2035 process and risk pathway. Designers and installers carry out their defined work. The TrustMark scheme provider supports registration and oversight. The obligated energy supplier decides whether to claim the measure, and Ofgem administers the obligation and audits supplier compliance.

One company can perform several roles, but the responsibilities should still be clear. Ask who has authority to change the design and who signs off each stage. A salesperson should not present a preliminary visit as the final technical approval unless that is genuinely the role being performed.

How can completed work be evidenced?

What happens during an audit?

A supplier, TrustMark body or Ofgem contractor may review records or arrange monitoring. Not every property receives the same audit. If someone requests access, ask for identification, the organisation’s details, the reason for the visit and a contact you can verify independently.

An audit may identify missing evidence, non-compliance or defective work. That does not automatically mean the resident caused the problem or must repay the ECO4 support. Ask for the finding in writing, who is responsible for correction, the proposed remedy and the complaint route if you disagree.

Responding to verification requests

1. Verify the person and organisation using an official contact route.

2. Ask what evidence is required and why it is necessary.

3. Provide copies rather than original documents unless a secure process requires otherwise.

4. Correct factual errors about the household or property promptly in writing.

5. Keep a copy of every document, photograph and response sent.

6. Seek consumer advice before signing a statement you do not understand.

Common verification challenges

Problems can include inconsistent addresses, expired or incorrect benefit evidence, missing landlord consent, an EPC mismatch, unrecorded design changes, poor photographs, products that differ from the specification, incomplete commissioning or late notification. These issues may delay the project or prevent a supplier from counting a measure.

Do not agree to recreate evidence that is untrue or sign a backdated statement. If an installer asks you to confirm work you did not receive, report the concern to the supplier and relevant scheme body. Fraud or deliberate false records can affect consumers, suppliers and public confidence in the scheme.

Why the process matters

Strong verification helps suppliers demonstrate that public-policy obligations have produced compliant measures. For residents, good records make it easier to understand the work, use new systems, claim under guarantees and show what happened if the property is sold or let.

Verification cannot prevent every defect. Keep inspecting the home after installation for unusual damp, cracking, loose finishes, blocked ventilation, control faults or changes in heating performance. Report concerns early and do not attempt unsafe repairs yourself.

Key takeaways

ECO4 can support significant improvements in eligible homes, but the route is more complex than a simple grant application. Household evidence, property rules, a compliant retrofit plan, supplier funding and suitable delivery capacity all need to align.

Questions to ask before accepting an offer

• Which obligated supplier is funding this project?

• Which household route and property rules are being relied upon?

• Who assessed the home and who is the retrofit coordinator?

• Why are these measures proposed, and what alternatives were considered?

• What is the total price, supplier funding and household contribution?

• Which repairs, permissions, making good and future costs are excluded?

• Which businesses will install the work, and how can I verify them?

• Which guarantees, certificates and complaint routes will I receive?

• What happens if the work cannot finish before 31 December 2026?

What happens next

Start with checks you can make without committing to work: find the EPC, confirm the tenure and permissions, review the current Ofgem and GOV.UK rules, and see whether your council publishes an ECO4 Flex route. You can also contact an obligated supplier directly or use the free organisations listed below.

Rules, delivery capacity, evidence requirements and support programmes can change. This guide cannot determine your household’s eligibility, the design for your home, the funding a supplier will offer or the likely outcome. A property-specific assessment and current written offer are needed before a decision is made.

Clearwise can make an introduction only where you choose to provide consent. The provider is independent and decides whether it can assess or assist. An introduction does not guarantee acceptance, suitability, funding, availability, savings or completion. You can use the FAQs, glossary, useful organisations and references before deciding whether to make an enquiry.

Frequently asked questions

Eligibility

Application process

Funding and costs

Installation and verification

Benefits and future considerations

Miscellaneous concerns

Useful organisations

Energy Saving Trust

Energy Saving Trust provides independent information on home energy and low-carbon options. Its household advice routes differ by nation: the Home Retrofit Advice and Information Line serves England, Home Energy Scotland serves Scotland, and Nest provides a route in Wales. It does not decide ECO4 supplier funding.

• England: 0800 098 7950; Scotland: 0808 808 2282; Wales: 0808 808 2244
• energysavingtrust.org.uk

Citizens Advice

Citizens Advice can help with consumer rights, contracts, traders and energy-related problems. The consumer service number shown is for England and Wales. The website links to the separate Citizens Advice Scotland service and other nation-specific support.

• 0808 223 1133 (England and Wales consumer service)
• www.citizensadvice.org.uk

Ofgem

Ofgem administers ECO4, publishes current scheme guidance and monitors obligated energy suppliers. Its ECO pages include household information, supplier contacts, delivery guidance and public reports. The phone shown is the dedicated support line for concerns about poor-quality wall insulation.

• 0808 169 4447 (wall insulation support)
• www.ofgem.gov.uk

National Energy Action (NEA)

National Energy Action is a fuel-poverty charity. Its Energy and Benefits Advice Support Service provides help with bills, income and keeping warm, mainly in England, Wales and Northern Ireland. Scotland readers can use Home Energy Scotland for nation-specific support.

• 0800 304 7159
• www.nea.org.uk

References

Still have questions?

If you're still unsure about how ECO4 applies to your personal situation - whether it's eligibility concerns, funding details, or simply understanding which measures would deliver the greatest benefit - speaking with an expert can be invaluable. Expert advisers can offer personalised insights that might not appear in a general guide, answering questions specific to your home and financial circumstances.

If you'd like further clarification or tailored recommendations, consider scheduling a conversation with an energy efficiency expert. You can discuss your specific challenges, explore potential solutions, and gain the peace of mind that comes with one-to-one guidance. The first consultation is often free, providing a risk-free way to ensure you fully understand all your options before proceeding with any improvements.