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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 拢179 million 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 拢778 million of grant funding to 104 projects, delivering from 2023 to 2026.

Wave 2.2 of the SHDF awarded around 拢80 million 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. Wave 1 tables will continue to be updated until final data for all homes treated is available. SHDF Wave 2.1 and Wave 2.2 are actively reporting.

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

The Wave 2.1 data is based on returns from 102 grant recipients, with completed installations reported by 66 grant recipients.

The Wave 2.2 data is based on returns from 42 grant recipients, with completed installations reported by 19 grant recipients.

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

Key statistics

Total homes upgraded

To the end of May 2025, there were around 83,000 measures installed in 41,500 households across SHDF Wave 1, Wave 2.1 and Wave 2.2.

SHDF Wave 2.1 has delivered around 47,400 measures in 23,600 households, while Wave 2.2 has installed around 3,900 measures in 1,900 households up to the end of May 2025.

Almost 100% of upgraded homes were improved to EPC band C or above under Wave 2.1 (16,450 households) and Wave 2.2 (1,620 households), this is based on the 70% (16,500 households) of all households for Wave 2.1 and 86% (1,630 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 May 2025, there have been around 47,400 measures installed in 23,600 households under SHDF Wave 2.1. This is an increase of 4,160 measures installed (10%) and 2,160 households upgraded (10%) compared to the June statistical release. Of this increase, 3,330 measures (80%) and 1,740 households (80%) 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 5,200 measures delivered in December 2024 to February 2025 to 4,400 in the three months to May 2025. There were 830 measures installed in May 2025, 1,200 in April and 2,400 in March. There was a similar pattern in households upgraded, with 420 households upgraded in May 2025, 520 households in April and 1,200 in March. 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 3,500 measures installed in March 2024 under Wave 2.1.

There have been around 3,900 measures installed in 1,900 households under SHDF Wave 2.2 to the end of May 2025. This is an increase of 630 measures installed (19%) and 290 households upgraded (18%) compared to the June statistical release. Of this increase, 460 measures (73%) and 220 households (76%) came from upward revisions to previous months from Grant Recipients. There were 170 measures installed in May 2025, 400 in April and 740 in March. There was a similar pattern in households upgraded, with 70 households upgraded in May 2025, 170 households in April and 360 in March. 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 54% (25,400 measures) of the total 47,400 measures; this is followed by electricity related measures (such as solar PV) accounting for 23% (10,700 measures); and measures to upgrade windows and doors (such as double or triple glazing) accounting for 14% (6,600 measures).

Of the 3,900 measures installed under Wave 2.2, the most common measure types have been insulation measures accounting for 47% (1,900 measures), with electricity related measures accounting for 29% (1,100 measures) and heating controls measures accounting for 11% (430 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 28% 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 May 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 23,600 households upgraded under SHDF Wave 2.1 up to the end of May 2025, meaning they have at least one measure installed.

Figure 3 shows that Yorkshire and The Humber had the most households upgraded (4,000 households, 17%), followed by the North East (3,500 households, 15%) and the East of England (3,300 households, 14%).

Of the 1,900 households upgraded under SHDF Wave 2.2, the West Midlands had the most households upgraded (630 households, 33%), followed by North East (450 households, 24%) and the South East (420 households, 22%)

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 May 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 79% (37,200 measures) of the total 47,400 measures; this is followed by bungalows accounting for 12% (5,600 measures) and flats accounting for 9% (4,500 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 81% (3,200 measures) of the total 3,900 measures, followed by bungalows (640 measures, 16%) and flats (130 measures, 3%). 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 May 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 28 August 2025.

Scheme Information

More information on the SHDF scheme can be found on the SHDF Wave 1 website, 聽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

罢丑别听Department鈥檚 statistical revisions policy聽sets out the revisions policy for these statistics, which has been developed in accordance with the UK Statistics Authority聽.

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:聽EnergyEfficiency.Stats@energysecurity.gov.uk. The Department鈥檚 statement on聽statistical public engagement and data standards聽sets out the department鈥檚 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聽Department鈥檚 statement of compliance聽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