Official Statistics

Summary of the Social Housing Decarbonisation Fund statistics: September 2025

Published 25 September 2025

Applies to England

Introduction

The Social Housing Decarbonisation Fund (SHDF) is a government scheme designed to upgrade a significant amount of the social housing stock currently below Energy Performance Certificate (EPC) C up to that standard.

The Government launched Wave 1 of the SHDF in August 2021. It awarded around £179m of grant funding for delivery from 2022 into 2023 for energy performance improvements to up to 20,000 social housing properties.

Successful projects within Wave 2.1 of the SHDF were announced on 22 March 2023. Wave 2.1 of the SHDF awarded around £778m of grant funding to 104 projects, delivering from 2023 to 2026.

Wave 2.2 of the SHDF awarded around £80m of grant funding from April 2024, building on the allocations made under the previous Wave 2.1 for delivery from 2024 to 2026.

What you need to know about these statistics

This release presents the latest statistics on the SHDF Wave 1, Wave 2.1 and Wave 2.2.

SHDF Wave 1 is now closed and the statistics are based on returns from all 62 local authorities who participated in this wave. SHDF Wave 2.1 and Wave 2.2 are actively reporting.

The data in these statistics are based on returns submitted by mid-September 2025, covering measure installations to the end of July 2025.

The Wave 2.1 data is based on returns from 102 grant recipients, with completed installations reported by 70 grant recipients.

The Wave 2.2 data is based on returns from 42 grant recipients, with completed installations reported by 21 grant recipients.

All figures in this publication are provisional and subject to revision.

Key statistics

Total homes upgraded

To the end of July 2025, there were around 90,800 measures installed in 44,500 households across SHDF Wave 1, Wave 2.1 and Wave 2.2.

SHDF Wave 2.1 has delivered around 54,100 measures in 26,100 households, while Wave 2.2 has installed around 5,000 measures in 2,300 households up to the end of July 2025.

Almost 100% of upgraded homes were improved to EPC band C or above under Wave 2.1 (18,600 households) and Wave 2.2 (2,000 households), this is based on the 71% (18,700 households) of all households for Wave 2.1 and 86% (2,010 households) for Wave 2.2, where pre and post installation EPC ratings are known and initial rating was band D or lower.

Delivery by month

To the end of July 2025, there have been around 54,100 measures installed in 26,100 households under SHDF Wave 2.1. This is an increase of 2,560 measures installed (5%) and 1,100 households upgraded (4%) compared to the August statistical release. Of this increase, 2,070 measures (81%) and 890 households (81%) came from upward revisions to previous months from Grant Recipients.

As shown in Figure 1, reported measure delivery under Wave 2.1 in the last 3-month period was down from 7,200 measures delivered in February 2024 to April 2025 to 2,700 in the three months to July 2025. There were 490 measures installed in July 2025, 760 in June and 1,500 in May. There was a similar pattern in households upgraded, with 210 households upgraded in July 2025, 320 households in June and 630 in May. It is likely that data, especially for the most recent months, will be revised upwards in future publications, but monthly delivery is lower than the peak of 3,700 measures installed in March 2024 under Wave 2.1.

There have been around 5,000 measures installed in 2,300 households under SHDF Wave 2.2 to the end of July 2025. This is an increase of 540 measures installed (12%) and 230 households upgraded (11%) compared to the August statistical release. Of this increase, 310 measures (57%) and 130 households (54%) came from upward revisions to previous months from Grant Recipients. There were 240 measures installed in July 2025, 230 in June and 290 in May. There was a similar pattern in households upgraded, with 110 households upgraded in July 2025, 100 households in June and 120 in May. It is likely that data, especially for the most recent months, will be revised upwards in future publications as more reports are received from Grant Recipients.

Figure 1: Number of Measures Installed by Installation Month under SHDF Wave 1, Wave 2.1 and Wave 2.2

The data used in Figure 1 can be found in Table 1 of the Accompanying Tables.

Delivery by measure type

As shown in Figure 2, the majority of measures installed under SHDF Wave 2.1 have been insulation measures, accounting for 53% (28,600 measures) of the total 54,100 measures; this is followed by electricity related measures (such as Solar PV) accounting for 22% (11,800 measures); and measures to upgrade windows and doors (such as double or triple glazing) accounting for 16% (8,500 measures).

Of the 5,000 measures installed under Wave 2.2, the most common measure types have been insulation measures accounting for 46% (2,300 measures), with electricity related measures accounting for 27% (1,400 measures) and heating controls measures accounting for 11% (560 measures).

Similar to the pattern for Wave 2.1, the majority of measures installed over the period under SHDF Wave 1 were insulation measures accounting for 59% (18,600 measures). Windows and door measures accounted for 23% and electricity related measures accounted for 13% of the total 31,700 measures installed.

The most common single measure type installed under Wave 1, Wave 2.1 and Wave 2.2 is loft insulation, accounting for 23%, 25% and 27% of measures installed respectively.

Figure 2: Percentage of Measures Installed by Measure Type under SHDF Wave 1, Wave 2.1 and Wave 2.2 (March 2022 to July 2025)

Solid Wall contains External Solid Wall Insulation and Internal Solid Wall Insulation measures; Other insulation contains all roof and floor insulation measures; ASHP: Air Source Heat Pump; GSHP: Ground Source Heat Pump; Other heat contains all non-ASHP and non-GSHP forms of low carbon heat and heating controls measures.

The data used in Figure 2 can be found in Table 3.1, 3.2 and 3.3 of the Accompanying Tables.

Delivery by region

There have been 26,100 households upgraded under SHDF Wave 2.1 up to the end of July 2025, meaning they have at least one measure installed.

Figure 3 shows that Yorkshire and The Humber had the most households upgraded (4,200 households, 16%), followed by the West Midlands (4,000 households, 15%) and the East of England (3,600 households, 14%).

Of the 2,300 households upgraded under SHDF Wave 2.2, the West Midlands had the most households upgraded (700 households, 30%), followed by North East (550 households, 24%) and the South East (470 households, 20%).

Please note the regions have different population sizes and participating number of grant recipients across Wave 1, Wave 2.1 and Wave 2.2.

Figure 3: Number of Households Upgraded under SHDF Wave 1, Wave 2.1 and Wave 2.2 by English Region (March 2022 to July 2025)

The data used in Figure 3 can be found in Table 6.1, 6.2 and 6.3 of the Accompanying Tables.

Delivery by property type

As shown in Figure 4, the majority of measures were installed in houses under Wave 2.1 accounting for 78% (42,200 measures) of the total 54,100 measures; this is followed by bungalows accounting for 12% (6,600 measures) and flats accounting for 10% (5,200 measures). No measures were installed in Maisonettes.

Similar to the pattern of Wave 2.1, the highest number of measures were installed in houses under Wave 2.2 accounting for 78% (3,900 measures) of the total 5,000 measures, followed by bungalows (940 measures, 19%) and flats (180 measures, 4%). No measures were installed in Maisonettes.

Figure 4: Percentage of Measures Installed by Property Type under SHDF Wave 1, Wave 2.1 and Wave 2.2 (March 2022 to July 2025)

Maisonettes and unknown property type feature less than 1% of measures installed across Wave 1, Wave 2.1, and Wave 2.2 and are not shown on this chart.

The data used in Figure 4 can be found in Table 4.1, 4.2 and 4.3 of the Accompanying Tables.

Annex: Further Information

Next publication date

The next publication will be released at 09:30am on Thursday 30 October 2025.

Scheme Information

More information on the SHDF scheme can be found on the SHDF Wave 1 website,  SHDF Wave 2.1 website and SHDF Wave 2.2 website.

Accompanying tables

Tables showing number of measures installed and households upgraded under SHDF are available.

Revisions policy

The Department’s statistical revisions policy sets out the revisions policy for these statistics, which has been developed in accordance with the UK Statistics Authority Code of Practice for Statistics.

User engagement

Users are encouraged to provide comments and feedback on how these statistics are used and how well they meet user needs. Comments on any issues relating to this statistical release are welcomed and should be sent to: EnergyEfficiency.Stats@energysecurity.gov.uk. The Department’s statement on statistical public engagement and data standards sets out the department’s commitments on public engagement and data standards as outlined by the Code of Practice for Statistics.

Pre-release access to statistics

Some ministers and officials receive access to these Official Statistics up to 24 hours before release. Details of the arrangements for doing this and a list of the ministers and officials that receive pre-release access to these statistics can be found in the Department’s statement of compliance with the Pre-Release Access to Official Statistics Order 2008.

Contact

Responsible statisticians: Nick Dann and Christine Cheung

Email: EnergyEfficiency.Stats@energysecurity.gov.uk

Media enquiries: 020 7215 1000

Public enquiries: 0300 068 6838