In the first quarter of 2025 over 68k energy efficiency measures were installed across Great Britain, under a scheme to tackle fuel poverty and reduce carbon emissions, figures show.
According to the latest data from the Department for Energy Security and Net Zero, around 4.2 million measures were installed in 2.5 million properties through the Energy Company Obligation by the end of March.
The Energy Company Obligation (ECO) scheme is a government energy efficiency scheme in Great Britain to tackle fuel poverty and help reduce carbon emissions. The scheme has had four iterations so far, with the latest being ECO4 – which started on 1st of April 2022 and will run for four years.
Nearly 20% of ECO measures installed have been under ECO4, as the total estimated annual bill savings from ECO4 has amounted to £138.5 million so far.
Additionally, heating controls, electric storage heating and district heating measures made up 50% of ECO4 measures installed.
The data team at Polimapper has visualised statistics on energy efficiency installations under ECO since its first iteration, by Westminster constituency and measure type.
The highest rate of ECO measures installed per 1,000 households was seen in Bradford West, at 1,020 measures. This was followed by Bradford East (948) and Birmingham Perry Barr (825).
Conversely, the London areas of Chelsea and Fulham, Battersea, Cities of London and Westminster, and Richmond Park saw the lowest number of installations under the scheme, below 20 measures per 1,000 households.
Regarding measure type, cavity wall insulation measures were seen most in the constituency of Wythenshawe and Sale East, at a total of 7,194 installations. Bradford East (6,048) and Bradford West (5,859) registered the highest numbers of Loft Insulation installations.
About this map
The map below shows all energy efficiency measures installed under ECO until March 2025.
To view statistics in your area double click on the map or click here to launch the full page version.
Geodata context
The new DESNZ data on energy efficiency comes after a new study, from the Energy and Climate Intelligence Unit, reveals that poor building standards add £1k to energy bills of new homes.
The analysis shows that residents of homes built in the past seven years have paid around £5bn more in energy bills than they would have if low-carbon building regulations had not been scrapped in 2016.
Jess Ralston, energy analyst at Energy and Climate Intelligence Unit: “Governments giving in to housebuilder lobbying have left Britain with more poor-quality homes, more dependent on foreign gas, and more exposed to the highly volatile gas markets during the ongoing energy crisis. Unless we lower our gas demand by building better, warmer homes that run on heat pumps then we’ll just have to import more from abroad, as the North Sea continues its decades-long decline in output.”