How to Apply for Insulation Grants in the UK

Where you actually apply (and where you don't)

The single most common mistake people make is trying to apply to Ofgem. You cannot. Ofgem administers the Energy Company Obligation, but it does not take applications from households. Every real insulation grant is applied for through one of a small number of channels, and which one you use depends entirely on where you live. This page maps those channels honestly, step by step, so you knock on the right door first time.

Before anything else, one rule protects you from every scam in this space: never start work, pay a deposit, or sign an installation contract before you have written grant approval. Legitimate schemes approve funding in writing before a single tile is lifted. Anyone pushing you to begin sooner is not running a real grant. If you want the fuller picture on this, read our guide to insulation grant scams and myths and our honest answer to whether these schemes are really free insulation grants.

Step one: check the two things every scheme cares about

Almost every UK insulation grant is gated on your property's energy rating and your household circumstances. Getting these clear first saves weeks.

• Your EPC. Most schemes require a poor Energy Performance Certificate, typically band D to G. Find yours on the government EPC register before you apply. If you don't have one, a scheme's own retrofit assessment will produce the evidence.
• Your eligibility route. This is usually a qualifying means-tested benefit, a low household income, or living in a targeted low-income postcode. You do not always need to be on benefits. Our interactive eligibility checker walks you through it, and if you are not claiming anything, see insulation grants if you are not on benefits.

Once you know roughly which route fits, use the nation-by-nation map below. Never mix schemes across borders: an England scheme quoted at someone in Scotland is a red flag for a cowboy.

The application channel by nation

Nation	Main schemes	How you apply
England	Warm Homes: Local Grant; ECO4 (to 31 December 2026)	Council (WH:LG) or gov.uk checker; obligated supplier/accredited installer, or council for ECO4 Flex
Scotland	Home Energy Scotland Grant & Loan; Warmer Homes Scotland; Area Based Schemes; ECO4	Home Energy Scotland, 0808 808 2282 (single gateway)
Wales	Warm Homes Nest; ECO4	Nest (Welsh Government), via nest.gov.wales
Northern Ireland	Affordable Warmth Scheme; NISEP	NIEAS 0800 111 44 55 (Affordable Warmth); Scheme Manager for NISEP

England: two doors, and you can knock on both

England has two live routes. They are separate schemes, so you can explore both.

Warm Homes: Local Grant

This is delivered by your local council at no cost to the occupant, and it runs to around 31 March 2028. It covers on-gas and off-gas homes and funds wall, loft and underfloor insulation, air source heat pumps, controls and solar. To qualify your home must be EPC band D to G and meet one of: household income usually £36,000 a year or under; a qualifying means-tested benefit; or an eligible low-income postcode.

1. Start on the government page: apply for the Warm Homes: Local Grant. It routes you to your council.
2. Your council confirms whether it is delivering the grant in your area, because availability is council-by-council.
3. A retrofit assessment identifies the right measures. Reported funding has been up to around £30,000 per home, though the gov.uk apply page states no maximum, so treat that figure as reported and check current gov.uk guidance.

ECO4

ECO4 was extended nine months and now runs to 31 December 2026. There is no ECO5 and no successor, and suppliers may stop taking new referrals before the end date, so do not wait. You apply through an obligated energy supplier or an accredited installer, or through your council under the ECO4 Flex (LA Flex) route if you are a low-income household not on benefits. Read the full detail on our ECO4 grant page, and if you are weighing schemes, our ECO4 vs GBIS comparison explains why GBIS is no longer an option. One important honesty note: the Great British Insulation Scheme closed on 31 March 2026. Any site presenting it as open is out of date.

Scotland: one phone number does everything

Scotland is the simplest to navigate because there is a single gateway. Call Home Energy Scotland on 0808 808 2282 or start online. They triage you across the Home Energy Scotland Grant & Loan, Warmer Homes Scotland, Area Based Schemes and ECO4.

• Home Energy Scotland Grant & Loan. No benefits test. Up to £7,500 (75% of cost) for energy efficiency, with a £1,500 rural and island uplift, plus up to £7,500 for clean heating, so up to £15,000 in total, or £18,000 rural. You must own and live in the home, and the measure must be recommended in an EPC or home energy report. Per-measure caps apply: solid wall £10,000; flat or room-in-roof £4,000; loft, cavity and floor £2,000 each; draughtproofing £500. Spray foam is excluded.
• Warmer Homes Scotland. Effectively free, with the Scottish Government usually meeting all costs, but gated on being 75 or over with no working central heating, terminally ill, or on a passport benefit.
• Area Based Schemes. Council-targeted; you cannot self-apply, but Home Energy Scotland will tell you if your area is covered.

Start here: Home Energy Scotland Grant and Loan on mygov.scot. Full detail on our Scotland insulation grants page.

Wales: apply through Nest

In Wales the main fuel-poverty scheme is Warm Homes Nest, which funds insulation and heating, and ECO4 also applies. Apply through Nest directly. Nest's exact eligibility and caps change, so confirm current figures on the official site rather than trusting a third-party number. Start at the Nest Warm Homes Programme on gov.wales, and see our Wales insulation grants page.

Northern Ireland: different schemes entirely

Northern Ireland does not use ECO4 or GBIS. Its two main channels are:

• Affordable Warmth Scheme. Delivered via the NI Housing Executive for households with total gross income under £23,000. It offers a grant up to £7,500, or £10,000 where solid-wall insulation is needed, and is open to owner-occupiers and private tenants with landlord consent, approved to March 2028. Apply through NIEAS on 0800 111 44 55. Details at the NI Housing Executive Affordable Warmth Scheme page.
• NISEP. Delivered by electricity Scheme Managers, with income thresholds that vary, so find the live list via the Utility Regulator rather than trusting a single quoted figure.

A Warm Healthy Homes Fund is proposed to replace Affordable Warmth from March 2028, but it is not open yet. See our Northern Ireland insulation grants page.

What a compliant application looks like

Whichever nation you are in, grant-funded work must follow the same quality chain, and knowing it protects you.

1. Retrofit assessment first. A compliant job starts with a retrofit assessment and a Retrofit Coordinator, not with a salesperson quoting you a single measure. If an installer skips the assessment and just sells you cavity wall or loft insulation, that is a red flag.
2. Check the credentials. Insist on TrustMark registration and PAS 2035 (retrofit) or PAS 2030 (installation), which are mandatory for grant-funded work. Verify the installer against the scheme channel: the obligated supplier for ECO4, your council for WH:LG, or Warmworks for Warmer Homes Scotland.
3. Written approval before work. Grants are approved in writing first. Never pay upfront.

Be especially wary of two things. First, spray-foam loft insulation, a known mis-selling trap that can block mortgages and is excluded from the Home Energy Scotland Grant. Second, if you had external wall insulation fitted under ECO4 or GBIS, note the National Audit Office found in October 2025 that around 98% of such jobs had defects, so free TrustMark Find & Fix audits are available. Check TrustMark if this applies to you.

Costs, and the 0% VAT angle

Even without a grant, installing qualifying insulation in Great Britain has been at 0% VAT under the Energy-Saving Materials relief, a genuine saving for able-to-pay households. Confirm the current rate against HMRC VAT Notice 708/6, and note Northern Ireland treatment can differ. For measure-by-measure costs and what grants typically cover, see our insulation cost guide and the full grants and funding hub.

Applying to the real schemes is always free. When you are ready, our quote form and contact page let you start an honest enquiry with no phone hard-sell. You can also explore measure-specific routes such as loft insulation grants, cavity wall insulation grants and solid wall insulation grants, where a contribution is most likely to be requested.