The short answer
To apply for a loft insulation grant in the UK, start at the official GOV.UK 'help to insulate your home' service or contact your energy supplier, who administers the ECO4 and Great British Insulation schemes. You provide details of your circumstances and property; if you appear eligible, an approved installer carries out an assessment, often including an EPC check, before fitting the insulation. The work is then delivered free or at reduced cost. Use official channels only — reputable grants are not sold through unsolicited doorstep or phone offers, which can be scams.
The application process is more about checks than paperwork. Here is the sequence, the official entry points, and how to keep it safe.
Applying at a glance
- Start pointGOV.UK or your energy supplier
- SchemesECO4, Great British Insulation Scheme
- AssessmentEligibility + property/EPC check
- Delivered byApproved installer
- AvoidUnsolicited cold-call offers
Step by step: how the process works
Applying for a grant follows a fairly consistent path across the schemes:
- 1. Check eligibility — use the GOV.UK 'help to insulate your home' tool or speak to your energy supplier. You will be asked about benefits, income, the property and its EPC.
- 2. Provide details — confirm your circumstances (any qualifying benefits), the property's tenure and, where relevant, its council tax band.
- 3. Property assessment — an approved installer surveys the loft, checks existing insulation against the recommended 270mm, and confirms what the scheme will fund.
- 4. Installation — the insulation is fitted by the approved installer, free or at reduced cost depending on the scheme and your circumstances.
- 5. Sign-off — you receive paperwork confirming the work; tenants will have needed landlord consent beforehand.
Choosing the right scheme and route
Which scheme fits depends mainly on whether you claim a qualifying benefit and on your home's energy rating.
| Your situation | Likely route |
|---|---|
| On a qualifying benefit | ECO4 (via supplier/installer) |
| Low income, no listed benefit | ECO4 LA Flex (council referral) |
| Average income, low-EPC home | GBIS General Group |
| Private tenant | Either scheme + landlord consent |
Indicative routing for guidance, 2026. The official assessment confirms which scheme applies to you.
After you apply: assessment, consent and quality
Once you have started an application, the most important stage is the property assessment. An approved installer will inspect the loft, measure existing insulation, and may carry out or rely on an EPC to confirm the home's rating — the schemes prioritise the least efficient properties, so a poorly insulated loft strengthens the case. If you are a private tenant, securing the landlord's consent in advance keeps the process moving, since the work cannot proceed without it.
Quality matters as much as cost. Use installers working under the recognised schemes, which carry consumer protections and standards, rather than informal traders. A correct job insulates to the recommended 270mm, keeps the eaves clear for ventilation, and does not pack insulation under the cold-water tank. If something goes wrong, the scheme's complaints and guarantee arrangements give you a route to put it right — another reason to apply through official channels rather than an unsolicited offer. Keep all paperwork, as it may help with future EPC assessments or a property sale.
Documents and standards to expect
Installations delivered under the government-backed schemes are expected to meet recognised quality standards, and that shows up in the paperwork you receive. Work is typically carried out under the PAS 2035 / PAS 2030 retrofit standards, which set out how a measure should be assessed, installed and checked, and reputable installers are certified accordingly. You should expect documentation confirming what was installed, to what depth, and any guarantee that applies — commonly backed by a recognised guarantee body for insulation measures.
Having these documents matters beyond the day of installation. They evidence that the loft now meets the recommended standard, which can support a future EPC and reassure a buyer if you sell. They also give you a clear route if a problem emerges later, because you can point to the standard the work was meant to meet. When choosing how to proceed, favour an installer who can show the relevant certification and who explains the guarantee, over a cheap quote with no such backing. Combined with applying only through GOV.UK or your energy supplier, this is the surest way to get insulation that is both grant-funded and properly done — a warmer home and a tidy paper trail to prove it.
Frequently asked questions
Where do I actually apply for a loft insulation grant?
Start at the GOV.UK 'help to insulate your home' service or contact your energy supplier, which administers ECO4 and the Great British Insulation Scheme. They check eligibility and arrange an approved installer to assess and fit the insulation.
Do I need an EPC to apply?
An EPC often forms part of the assessment because the schemes target less efficient homes. The installer may use an existing EPC or arrange one; a low rating with an under-insulated loft strengthens your case.
How do I avoid loft insulation grant scams?
Apply only through GOV.UK or your own energy supplier. Be wary of unsolicited phone calls or doorstep visits offering 'free government insulation' — verify any offer through official channels before sharing details or agreeing to work.
Sources & further reading
Figures on this page are typical UK ranges drawn from published sources and depend on your specific loft. They are guidance, not a quotation.