ECO4 Scheme and Insulation Grants by Area 2026 — Measures and Homes
ECO and the Great British Insulation Scheme paid for energy-efficiency measures across Great Britain. This page shows what DESNZ recorded in each authority: measures installed and households receiving them, kept as two different counts.
The Great British Insulation Scheme closed on 31 March 2026. Its figures below are a record of delivery before it closed, not an application route. ECO eligibility remains an official decision and is not assessed here.
ECO and GBIS measures in your area
Choose a local authority to see the latest cumulative scheme figures held. A blank is not changed into zero: the source uses several forms of unavailable cell, and an omitted row does not prove which one it was.
ECO and GBIS delivery
Aberdeen City
| Scheme | Measures installed | Households receiving measures |
|---|---|---|
| Energy Company Obligation (ECO) | 10,182 no rate — dwelling stock is published for England only. | 8,177 |
| Great British Insulation Scheme (GBIS)closed | 60 no rate — dwelling stock is published for England only. | 48 |
Measures and households are separate published counts. One household can receive several measures, so neither count is derived from the other. The rate is measures per 1,000 dwellings for English areas only; it is not a share of households helped.
DESNZ also publishes 113,370 as a household projection. This is DESNZ’s 2022-based household projection for 2025. It is shown as published and is not the dwelling denominator used for any rate.
This page does not decide whether you qualify. Use the official ECO information and eligibility route.
Measures, households and dwellings are different
A measure is one installation. A household is a group of people, and one household can receive several measures. A dwelling is a self-contained home whether or not anybody lives in it. The published household projection is shown as context but is never used as the denominator.
For English areas only, the comparison rate divides measures by MHCLG’s separately sourced dwelling stock and states that basis beside the number. Scottish and Welsh areas return no rate, because no Great Britain denominator can be built from an England-only release.
How many measures go in each year
The figures above are cumulative totals for one area. This is the national picture over time: how many measures went in across Great Britain each year, and which schemes paid for them. It answers the question a single cumulative count cannot, which is whether delivery is speeding up or slowing down.
The series is annual and counts measures rather than homes. The Energy Company Obligation is most of it — 4.4 million of the 4.9 million measures recorded since 2013 — so the smaller schemes are listed separately rather than lost inside a total.
Great Britain · 2013 to 2025
How many measures go in each year
Measures installed in 2025
385,041
449,026 the year before
- 2013530,878
- 2014783,208
- 2015453,700
- 2016367,725
- 2017201,478
- 2018211,742
- 2019218,272
- 2020318,337
- 2021457,337
- 2022213,370
- 2023332,659
- 2024449,026
- 2025385,041
Which schemes are still installing, 2025
Schemes that had already closed are left out rather than shown as zero. A zero below is a scheme that is still open and installed nothing.
- Energy Company Obligation (ECO)271,728 measures
- Great British Insulation Scheme67,032 measures
- Social Housing Decarbonisation Fund35,193 measures
- Home Upgrade Grant9,624 measures
- Warm Homes: Local Grant799 measures
- Warm Homes: Social Housing Fund665 measures
- Green Deal finance plans0 measures
A measure is one installation, not one home. A house that has its loft topped up and its cavity filled counts twice here. DESNZ publishes a separate households figure and it covers the Energy Company Obligation alone.
These are measures installed during a year. The insulated stock figures on this page are a count of properties that have a measure in place. They answer different questions and do not reconcile, because a measure can be installed in a property already counted as insulated.
How much insulation potential remains
The national stock series estimates how many properties already have cavity-wall, loft or solid-wall insulation and how many could still take it. It is a Great Britain stock estimate, separate from the scheme-delivery counts above.
Great Britain insulation stock
Properties insulated and remaining potential
| Insulation type | Properties insulated | Remaining potential | As at |
|---|---|---|---|
| Cavity walls | 15,406,000 | 5,041,000 | December 2025 |
| Lofts | 17,703,000 | 7,731,000 | December 2025 |
| Solid walls | 909,000 | 7,601,000 | December 2025 |
Insulation stock and scheme delivery answer different questions and do not reconcile: a scheme measure can top up a property already counted as insulated. Remaining potential is DESNZ’s estimate of what is technically possible, not a forecast, target or promise that a property qualifies for a scheme.
What London’s homes are made of
The Greater London Authority’s model describes homes across the capital — their walls, roofs and heating. This is 3,887,534 homes across 33 boroughs, summarised from 4,994 neighbourhoods.
These are shares of the homes that were actually surveyed, not of every home in London. Only homes with a publisher-observed value are counted in each measure, so every figure below also states its own coverage.
- Walls insulated
- 34.2% of the homes surveyed765,620 of 2,236,274 homesBased on 57.5% of London’s homes — the rest are modelled, not surveyed, and are not counted here.
- EPC band C or better
- 50.8% of the homes surveyed1,314,932 of 2,589,038 homesBased on 66.6% of London’s homes — the rest are modelled, not surveyed, and are not counted here.
- Heated by mains gas
- 87.1% of the homes surveyed2,054,081 of 2,358,499 homesBased on 60.7% of London’s homes — the rest are modelled, not surveyed, and are not counted here.
- Heated by electricity
- 12.4% of the homes surveyed293,357 of 2,358,499 homesBased on 60.7% of London’s homes — the rest are modelled, not surveyed, and are not counted here.
- Heated by a heat pump
- 0.37% of the homes surveyed9,619 of 2,568,860 homesBased on 66.1% of London’s homes — the rest are modelled, not surveyed, and are not counted here.
- Roof could take solar
- 87.1% of all homes3,386,228 of 3,887,534 homesHomes in a building with a usable roof — not a count of roofs. A block of flats counts once for every flat in it.
Homes by borough
| Borough | Homes |
|---|---|
| Croydon | 170,383 |
| Barnet | 162,828 |
| Wandsworth | 161,126 |
| Lambeth | 150,273 |
| Ealing | 149,228 |
| Southwark | 149,062 |
| Tower Hamlets | 144,191 |
| Bromley | 143,916 |
| Lewisham | 139,377 |
| Westminster | 138,510 |
| Brent | 135,126 |
| Enfield | 132,530 |
| Newham | 131,250 |
| Greenwich | 128,997 |
| Hackney | 124,118 |
| Camden | 121,640 |
| Haringey | 119,067 |
| Hillingdon | 118,533 |
| Waltham Forest | 111,589 |
| Hounslow | 110,935 |
| Islington | 109,039 |
| Havering | 108,759 |
| Redbridge | 108,113 |
| Bexley | 101,485 |
| Hammersmith and Fulham | 100,320 |
| Harrow | 97,795 |
| Kensington and Chelsea | 92,022 |
| Merton | 88,265 |
| Sutton | 86,848 |
| Richmond upon Thames | 86,291 |
| Barking and Dagenham | 81,070 |
| Kingston upon Thames | 76,407 |
| City of London | 8,441 |
London only - about 13 per cent of Great Britain's households. A London figure is never a Great Britain one.
119 of 4,994 LSOAs draw dwellings from more than one borough, so an LSOA is apportioned between them in the publisher's own counts rather than assigned whole to one.
Every figure is a count of DWELLINGS. Nothing here counts buildings: the building key is an Ordnance Survey column this source never requests, so the repeated per-dwelling solar figures cannot be de-duplicated and are never summed.
Contains London Building Stock Model 2 data from the Greater London Authority, licensed under the Open Government Licence v3.0. Contains Ordnance Survey data (c) Crown copyright and database rights 2023. · London Building Stock Model 2
Where to check eligibility
This page does not decide whether a household qualifies. Read the official ECO guidance and eligibility route for the current scheme. GOV.UK also keeps the former Great British Insulation Scheme page as the official record of the scheme that closed.
For the wider register of household support, see energy grants and schemes. That register also ends at the official route rather than making its own eligibility judgement.
Frequently asked questions
Is the Great British Insulation Scheme still open?
No. The Great British Insulation Scheme closed on 31 March 2026. The figures on this page are the measures it delivered before closing; they are not evidence that applications remain open.
Does a high local count mean I qualify for ECO4?
No. A local delivery count describes completed measures in the official statistics. It says nothing about an individual home’s eligibility. Use the official ECO information and route linked on this page; this site does not make an eligibility decision.
Why are measures and households different?
One household can receive more than one measure, such as loft and cavity-wall insulation. DESNZ publishes both counts, so this page keeps both and never divides one by the other.
Why is there no per-dwelling rate for Scotland or Wales?
The scheme release covers Great Britain, but the dwelling-stock denominator held here is published for England only. Scotland and Wales publish their own series on their own definitions, so this page returns no rate rather than combining unlike figures.
Related reading
Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.