ECO4 has just over a year left to run, and winter is when insulation demand peaks hardest. If you're an installer relying on word-of-mouth alone, you're leaving grant-funded work on the table that competitors are quietly scooping up through paid leads.

This is the window to get your lead generation right. Between now and 31 December 2026, roughly £1 billion a year in ECO4 funding is still flowing through the big suppliers, and winter always brings a fresh wave of homeowners searching for loft top-ups, cavity wall fills and solid wall retrofits once their heating bills spike. Sort your qualifying process and lead sources now, and you'll be well placed for the Warm Homes Plan when it lands in 2027 too.

What ECO4 Actually Is and Why It Matters Right Now

ECO4 (Energy Company Obligation, phase 4) launched in July 2022 and obligates larger energy suppliers — British Gas, EDF, E.ON Next, Octopus, OVO and others — to fund energy efficiency improvements for eligible households. It's not a government grant paid from taxpayer money; it's a legal obligation on suppliers, funded through customer bills, which is why the money keeps flowing regardless of political changes.

The scheme closes 31 December 2026. There is no ECO5. From January 2027, the £15 billion Warm Homes Plan takes over — meaning the next 12-14 months are the last chance to build a business around ECO4-specific lead flow before the rules reset.

By December 2025, ECO4 had delivered over 1.01 million energy efficiency measures across roughly 298,100 households, according to the UK Government's Home Energy Efficiency Statistical Release. That's a lot of loft insulation, cavity wall fills and external wall systems fitted at scale — and a lot of installers who got paid to do it.

Here's the bit most installers miss: ECO4's "whole-house" approach means one qualifying household often needs multiple measures, not just a single job. Government figures show an average of 4.10 measures per household under ECO4 alone, up from 1.84 measures per household under ECO3. That's more than double the work per lead — and it should change how you price your pipeline and pitch the job.

Qualifying ECO4 Leads Before You Pay For Them

The single biggest waste of money in this niche is paying for a lead, driving out to a survey, and finding the homeowner doesn't qualify. Eligibility criteria are genuinely complex, and most lead generation firms admit as much — but few tell you how to actually check before you commit a slot in your diary.

A household typically qualifies for ECO4 through one of three routes:

  • Income test — household income under £31,000
  • Benefits test — receipt of certain income-related benefits (Universal Credit, Pension Credit, Child Tax Credit and similar)
  • EPC test — a current Energy Performance Certificate rated D, E, F or G

How to vet a lead before booking the survey

  1. Ask for the EPC upfront. Every property has one on the public register — check gov.uk's EPC register by postcode before you even ring the homeowner back. If the property's already A-C rated, it's very likely ECO4-ineligible unless they qualify on income or benefits instead.
  2. Confirm benefits status verbally, don't assume. A lead form ticking "receives benefits" isn't proof. A two-minute call clarifying which benefit, and roughly when it started, saves a wasted site visit.
  3. Cross-check Council Tax band for GBIS leads. The Great British Insulation Scheme, which runs under the ECO4A Order until around April 2026, targets homes in lower Council Tax bands or with worse EPC ratings — slightly different criteria to core ECO4, so don't assume the two schemes qualify the same household.
  4. Get the property type early. Solid wall properties need different treatment (and budget) to cavity wall. ECO4 has a Solid Wall Minimum Requirement sub-obligation targeting the equivalent of 90,000 measures across the scheme — meaning suppliers are actively funding solid wall jobs, but installers need to pitch internal or external wall insulation specifically, not just assume loft top-up will do.

Winter Demand: Positioning to Capture the Seasonal Spike

Search volume for insulation jobs rises sharply from October through February every year — no source needs to tell you that if you've worked a British winter. Heating bills land, homeowners feel the draught, and loft, cavity wall and solid wall enquiries all climb together.

The mistake most installers make is treating their marketing spend as flat across the year. If you're buying leads at the same rate in June as you are in December, you're underspending during the exact months when conversion is highest and overspending during the quiet season when homeowners aren't thinking about their heating bill at all.

In practice, the installers who do well shift their lead budget deliberately:

  • October-November: ramp up spend as bills start landing and awareness peaks
  • December-February: highest volume window — most bookings and best appointment rates
  • March-April: taper as weather warms, but keep some spend running for GBIS and solid wall jobs which aren't purely weather-driven
  • May-September: reduce volume, but don't switch off entirely — use the quiet months to build referral relationships and EPC assessor partnerships instead

Winter also changes what homeowners are willing to hear. A pitch about a single loft top-up lands less well than a whole-house survey covering loft, cavity and draught-proofing together — which, handily, matches how ECO4 actually funds work now that the average household gets 4.10 measures rather than one.

Buying Exclusive vs Shared Insulation Leads

Not all leads are equal, and price alone tells you almost nothing about quality. The real question is whether you're buying an exclusive lead sold only to you, or a shared lead resold to three or four competing installers.

Shared leads are cheaper per unit, but the homeowner's fielding calls from multiple installers within the hour. Whoever calls back fastest usually wins the job — so your close rate depends more on speed than sales skill. Exclusive leads cost more upfront, but you're the only installer that homeowner hears from. That usually means a longer, calmer sales conversation and a higher conversion rate per lead purchased.

In the UK market, exclusive insulation leads — covering loft, cavity wall and spray foam removal work — have been advertised from around £22 per lead. That's a starting point, not a ceiling. ECO4-specific leads with verified eligibility data attached tend to command a premium over generic insulation enquiries, precisely because of the qualification work described above.

When judging a lead generation partner, ask them directly:

  • Is this lead exclusive or shared, and if shared, with how many others?
  • What's the average appointment rate their existing clients report?
  • Do they pre-qualify on EPC, income or benefits before passing the lead to you?
  • How fresh is the lead — sold within minutes of the enquiry, or sitting in a batch for days?

Cost-Per-Lead Benchmarks and Judging a Fair Price

There's no single "correct" price for an insulation lead in the UK. It depends on exclusivity, qualification depth and the measure type. Still, a few reference points help you judge whether you're being quoted fairly.

Generic, unqualified insulation enquiries — someone who filled in a form with minimal screening — sit at the lower end, sometimes near that £22 exclusive-lead starting point. Leads pre-screened against ECO4's income, benefits or EPC criteria cost more, because the provider's done work you'd otherwise have to do yourself on the phone.

The maths that actually matters is cost per booked survey, not cost per lead. A £22 lead that converts to an appointment 7.5% of the time costs you roughly £293 per booked survey. A £40 lead that's been properly qualified and converts at 20% costs you £200 per booked survey — cheaper in practice, despite the higher sticker price.

Ask any provider for their historical appointment rate before you commit budget, and track your own numbers from week one. That way you're comparing providers on equal terms, not just sticker price.

Diversify Your Pipeline: Don't Rely on One Source

Relying on a single lead marketplace is a fragile strategy. Providers change pricing, exclusivity policies or lead volume without warning, and if that's your only tap, your whole pipeline dries up overnight.

The installers with the steadiest work mix purchased leads with self-generated ones:

  • EPC assessor partnerships — assessors see every low-rated property before anyone else does; a referral arrangement with two or three local assessors can be more reliable than any paid lead source.
  • Referral schemes — a simple £50-£100 referral fee to past customers for introducing a neighbour costs less than most paid leads and converts far better.
  • Local trade partnerships — mortgage brokers, letting agents and boiler installers all meet homeowners who need insulation advice; a reciprocal referral arrangement costs nothing but relationship-building.
  • Multiple paid providers — run two or three lead sources at once, even at modest volume each, so one provider's bad month doesn't sink your entire order book.

Life After ECO4: Preparing for the Warm Homes Plan

Most guidance on this topic stops at ECO4's rules and ignores what happens next. That's a mistake — 31 December 2026 is now inside most installers' planning horizon.

From January 2027, the £15 billion Warm Homes Plan replaces ECO4 entirely across England, Scotland and Wales. Details are still firming up, but the direction is clear: continued support for low-income and fuel-poor households, alongside growing emphasis on Able-to-Pay work and the Boiler Upgrade Scheme (BUS) for households funding their own improvements. Scotland runs its own Home Energy Scotland (HES) advice and funding route alongside UK-wide schemes, so installers working north of the border should keep both frameworks in view rather than assume England's rules apply uniformly.

The practical takeaway: start diversifying your lead mix towards Able-to-Pay and BUS-adjacent work now, rather than waiting until ECO4 closes. Homeowners who don't qualify for grant funding but still want cavity wall or loft insulation are a growing segment. Installers who've built that channel before the ECO4 cliff-edge will have a smoother transition than those who haven't.

Frequently Asked Questions

How do I check if a homeowner actually qualifies for ECO4 before booking a survey?

Check the property's EPC rating on the gov.uk public register by postcode — anything D to G is a strong signal. Then confirm income (under £31,000) or benefits status directly with the homeowner over the phone rather than relying on a lead form's tick-box answers.

What's the difference between ECO4 and the Great British Insulation Scheme (GBIS)?

ECO4 qualifies households through income, benefits, or EPC rating D-G. GBIS, which runs under the ECO4A Order until around April 2026, instead targets homes in lower Council Tax bands or with worse EPC ratings — similar aim, slightly different eligibility route, so check which scheme a lead actually fits before pitching it.

Should I focus only on loft insulation, or pitch multiple measures?

Pitch multiple measures. Government data shows ECO4 households receive an average of 4.10 measures each, compared to 1.84 under the previous scheme, so a whole-house survey covering loft, cavity and draught-proofing together converts better than a single-measure pitch.

Is Scotland covered by ECO4, or does Home Energy Scotland run separately?

ECO4 applies across England, Scotland and Wales, but Scottish homeowners also have access to Home Energy Scotland (HES) advice and funding routes. Installers working in Scotland should check both frameworks rather than assuming England-only rules apply.

Will there be an ECO5 after ECO4 closes?

No. ECO4 closes 31 December 2026 and is not being replaced by an ECO5 — the £15 billion Warm Homes Plan takes over from January 2027, with a stronger emphasis on Able-to-Pay work alongside continued low-income support.

Get your qualification process tight now, spread your lead spend across the winter peak deliberately, and start building the referral and Able-to-Pay channels that'll carry you past December 2026. Installers who treat lead buying as a system rather than a gamble are the ones still fully booked when ECO4 closes and the Warm Homes Plan opens.