Research and analysis

Building Safety Remediation: monthly data release - May 2025 (Accessible version)

Published 26 June 2025

Applies to England

Date of next publication: 9.30am on Thursday 17 July 2025

All figures in this release can also be found in an interactive dashboard.

Headlines

Overall remediation

As at the end of May 2025, there are 5,176 residential buildings 11 metres and over in height identified with unsafe cladding whose remediation progression is being reported on in this release, an increase of 124 since the end of April 2025.

Since the department first began reporting on all five remediation programmes in October 2023, 1,379 more buildings with unsafe cladding are being reported on in this release.

Overall, 2,482 buildings (48%) have either started or completed remediation works. Of these, 1,754 buildings (34%) have completed remediation works.

Figure 1: Of the 5,176 buildings identified with unsafe cladding, 2,482 (48%) have started or completed remediation works, of which 1,754 (34%) have completed remediation works. This includes remediation progress on high rise (18m+) and mid-rise (11-18m) buildings in height.

Note: From October 2023 onwards combined remediation progress is shown across the BSF, ACM programme, Cladding Safety Scheme, developer remediation contract and as reported by registered providers of social housing. The total number of buildings identified with unsafe cladding, reported in the overall remediation section of the data release, does not sum to the total number of buildings in each remediation programme, reported in each respective section of the data release. This is due to some buildings appearing in more than one remediation programme.

The increase in the number of reported completions between May and June 2024 is largely due to a change in methodology in reporting social housing sector remediation, which from June 2024 includes social housing buildings that had completed remediation independently of government funding and monitoring schemes before March 2024.

ACM remediation – monthly update (as at end May 2025) since previous publication.

As at 31 May 2025 of the 517 high-rise (18 metres and over in height) residential and publicly owned buildings with ACM cladding systems, unlikely to meet Building Regulations, 495 (96%) have either started or completed remediation works, an increase of one since the end of April.

Of these, 457 buildings (88%) have completed ACM remediation, including those awaiting building control sign-off, an increase of three since the end of April.

There are 22 buildings yet to start ACM remediation (4% of all buildings), no change since the end of April. One building is vacant so does not pose a risk to resident safety, 17 occupied buildings have forecast start dates, a further building has had local authority enforcement action taken against them and the remaining three buildings have come into scope in 2024 and 2025.

Building Safety Fund (BSF) – monthly update (as at end May 2025) since previous publication.

As at 31 May 2025, of the 772 high-rise (18 metres and over in height) residential buildings proceeding with an application for funding through the Building Safety Fund, 133 buildings (17%) have started remediation works and 411 buildings (53%) have completed remediation on unsafe non-ACM cladding, including those awaiting building control sign-off.

Overall, 544 high-rise buildings (70%) in the BSF have either started or completed remediation works on non-ACM cladding, no change since the end of April. Of these, 411 buildings (53% of buildings) have completed remediation works, an increase of four since the end of April.

Cladding Safety Scheme (CSS) – monthly update (as at end May 2025) since previous publication.

As at 31 May 2025, 732 buildings 11 metres and over in height have been assessed as eligible for the Cladding Safety Scheme (including 166 buildings that have transferred from the BSF), an increase of 76 eligible buildings since the end of April. Of the 732 eligible buildings, 123 buildings (17%) have either started or completed remediation works, an increase of five since the end of April. Of these, 38 buildings (5%) have completed remediation works, including those awaiting building control sign-off, an increase of five since the end of April.

The CSS continues to investigate and pull in potentially eligible buildings. There are a further 6,052 buildings 11 metres and over in height in the pre-eligible stages of the Cladding Safety Scheme, which launched fully in July 2023. Of these, 258 buildings are progressing through eligibility checks, and 5,794 buildings are in the pre-application stage.

Developer remediation – data received from developers as at 30 April 2025. Data received from other programmes relating to developer-led remediation is as at 31 May 2025.

As at 31 May 2025, 2,025 buildings 11 metres and over in height have been identified as having life-critical fire safety defects (including cladding and non-cladding defects) which developers have committed to remediate or pay to remediate (where the cladding remediation works are being carried out in a government funded remediation programme), an increase of 181 since reported in the April data release.

Of these, developers reported that 997 (49%) have either started or completed remediation works, an increase of 40 since reported in the April data release. Of these, 516 (25% of buildings) are reported to have completed remediation works, an increase of 15 since reported in the April data release.

When excluding buildings reported with only non-cladding defects, there are 1,526 buildings which developers have reported as having unsafe cladding, an increase of 75 since reported in the April data release. Of which 824 (54%) are reported to have started or completed remediation, an increase of 35 since reported in the April data release, including 448 (29% of buildings) which are reported to have completed remediation, an increase of seven since reported in the April data release.

Social housing sector – quarterly data received from Registered Providers of social housing is at 31 March 2025. Where data from other government programmes has been used to supplement this, the data is as at 31 May 2025.

As at 31 May 2025, 2,794 social buildings 11 metres and over in height have been identified as having life-critical fire safety cladding defects. This is an increase of 75 buildings since reported in the April data release. The 2,794 buildings have been identified using survey data submitted by Registered Providers of social housing and data on buildings the department is monitoring under other government programmes (ACM programme, BSF, CSS and Developer Remediation contract).

Of these, 1,226 (44%) are reported to have started or completed remediation works - a decrease of two buildings since reported in the April data release. Further detail on why there has been a fall in the number of buildings reported to have started or completed remediation is available in the social housing section of the data release. Of these, 1,226 buildings, 953 (34% of buildings) have completed remediation - an increase of 96 buildings since reported in the April data release.

Enforcement – monthly update (as at 20 May 2025) since previous publication

As at 20 May 2025, local authority enforcement action has been, or is being, taken under the Housing Act 2004 against 553 buildings over 11m with suspected unsafe cladding, an increase of eight since the end of April.

Introduction

This Data Release provides data on:

• Remediation progress across MHCLG’s Building Safety Remediation portfolio, covering buildings in the ACM programme, Building Safety Fund, Cladding Safety Scheme, developer remediation contract and reported by registered providers of social housing.

• Progress with remediation of high-rise (18 metres and over in height) residential buildings (including student accommodation and hotels) and publicly owned buildings with ACM cladding systems unlikely to meet Building Regulations in the ACM programme.

• Progress with remediation of high-rise residential buildings with non-ACM cladding systems assessed as eligible for funding from the Building Safety Fund.

• Progress with the applications for and remediation of medium-rise (11 – 18 metres in height) residential buildings in England, and Northern Ireland, and high-rise residential buildings outside of London with non-ACM cladding systems in the Cladding Safety Scheme.

• Progress of remediation of residential buildings 11 metres and over in height with life-critical fire safety risks under the developer remediation contract.

• Progress of remediation of residential buildings 11 metres and over in height with unsafe cladding reported by registered providers of social housing.

• Enforcement action taken by local authorities against high-rise residential buildings with unsafe cladding under the Housing Act 2004.

The data in Figure 1 and the overall remediation progress section of the data release, shows the combined remediation progress across MHCLG’s Building Safety Remediation portfolio, covering buildings and accounting for crossover in the ACM programme, Building Safety Fund, Cladding Safety Scheme, developer remediation contract and reported by registered providers of social housing.

The figures in this publication are correct as at the specified dates. Remediation progress on the ACM programme, BSF and CSS will be updated monthly, and remediation progress on the developer remediation contract and registered providers of social housing will be updated quarterly.

Enquiries

Contact: BuildingSafetyData2@communities.gov.uk

Media enquiries: 0303 444 1209

NewsDesk@communities.gov.uk

User Engagement

We are committed to improving and broadening this data release further in the months ahead and would welcome feedback both on the revised content of this data release and what could be further done in the future. Please contact BuildingSafetyData2@communities.gov.uk

Dates of future publications

The publication dates for the next three months are:

• 17 July 2025

• 21 August 2025

• 25 September 2025

Building Safety Overview

This data release publishes data across all government remediation activities to give an overview of the status of progress to remediate unsafe cladding on residential buildings over 11m in England. This includes:

• Data relating to the Aluminium Composite Material (ACM) cladding programme – those highest risk buildings that are high-rise buildings with unsafe, ‘Grenfell-style’ ACM cladding.

• Data relating to the Building Safety Fund, which funds the remediation of eligible high-rise residential buildings with other forms of unsafe cladding.

• Data relating to the Cladding Safety Scheme, which funds the remediation of residential buildings over 11m in height with unsafe cladding.

• Data relating to developer-led remediation, which reports on those buildings that developers have agreed to remediate.

• Data on residential buildings over 11m in height that are the responsibility of registered social housing providers.

Overall remediation progress

Figure 2: 2,482 residential buildings (48% of identified buildings) have started or completed remediation on unsafe cladding, of which 1,754 (34% of identified buildings) have completed remediation works.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	1754	34%	1754	34%
Remediation underway	728	14%	2482	48%
In programme	2694	52%	5176	100%
Total	5176	100%	5176	100%

Table 1: Remediation progress for buildings monitored by MHCLG in the ACM programme, Building Safety Fund, the CSS, the developer remediation contract, and social housing surveys, England, 31 May 2025.

Overall remediation: key statistics

Of the 5,176 residential buildings 11 metres and over in height with unsafe cladding the department is monitoring, as of 31 May 2025:

• 1,754 buildings (34%) have completed remediation, including those awaiting building control sign off

• 728 buildings (14%) have started remediation

• 2,694 buildings (52%) have not started remediation

Since the end of April 2025:

• The department is monitoring the remediation progress of 124 more buildings.

• Five more buildings are known to have started or completed remediation. This is a net change. While 124 buildings are reported to have started or completed remediation in the most recent time period when they previously were not reported to have started remediation (73 buildings) or not reported to have cladding defects (51 buildings), this was offset by the status of 119 buildings changing from having started or completed remediation to not having cladding defects (40 buildings) or not having started remediation (79 buildings) in the latest time period. The majority of the buildings whose statuses changed to not having started or completed remediation, or not having cladding defects, were reported as such by registered providers of social housing.

• The number of buildings known to have completed remediation has increased by 102.

Since the end of May 2024:

• The department is monitoring the remediation progress of 802 more buildings, largely due to more buildings being identified with unsafe cladding in the CSS and reported by developers and social housing registered providers.

• 416 more buildings are known to have started or completed remediation, and 666 more buildings are known to have completed remediation.

There are an estimated 274,000 dwellings in the occupied private and social sector 11m+ residential buildings with unsafe cladding that the department are monitoring. Of these an estimated 104,000 dwellings are in buildings that have completed remediation, and an estimated 48,000 additional dwellings are in buildings that have started remediation. An estimated 123,000 dwellings are in buildings that have not started remediation.

Figure 3: Progress of remediating unsafe cladding differs across the programmes due to the differing maturity of the schemes.

Overall remediation by height

Figure 4: 56% of the 18m+ buildings the department is monitoring the remediation progress of have started or completed remediation on unsafe cladding, compared to 36% of 11-18m buildings.

Overall remediation by tenure

Figure 5: 44% of the social buildings the department is monitoring the remediation progress of have started or completed remediation on unsafe cladding, compared to 51% of the private buildings.

The ‘Other’ bar includes high-rise buildings with unsafe ACM that are hotels, student accommodation and public buildings.

Overall remediation by location

Figure 6: Most buildings that the department are monitoring the cladding remediation of are concentrated around urbanised areas in England, particularly the urban areas of Greater London, Greater Manchester, West Yorkshire and the south coast.

England, 31 May 2025

Local authorities with 10 or fewer 11m+ buildings monitored with unsafe cladding are excluded from this map as their inclusion could lead to the identification of buildings with unsafe cladding.

ACM Remediation

Information in this section is correct as at 31 May 2025 and shows a monthly update from the previous publication.

Figure 7: 96% of the 517 identified ACM clad high-rise buildings have started or completed remediation, with 94% having had their ACM cladding removed and 88% having completed remediation works on site.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Completed Remediation	432	84%	432	84%
Remediation complete awaiting building control signoff	25	5%	457	88%
Remediation started - cladding removed	27	5%	484	94%
Remediation started	11	2%	495	96%
Remediation plans in place	18	3%	513	99%
Intent to remediate	0	0%	513	99%
Remediation plan unclear	4	1%	517	100%
Total	517	100%	517	100%

Table 2: Remediation status of buildings with ACM cladding systems unlikely to meet Building Regulations, 31 May 2025

ACM Remediation: key statistics

As of 31 May 2025, the department has identified 517 high-rise residential and publicly owned buildings identified with ACM cladding systems unlikely to meet Building Regulations, an increase of one since the end of April. The building which was determined as in scope of the ACM programme in April has already had unsafe ACM cladding removed from the building.

• 457 buildings (88% of all buildings) have completed ACM remediation – an increase of three since the end of April. Of these, 432 buildings (84% of all buildings) have received building control sign off – an increase of four since the end of April.

• 495 buildings (96% of all buildings) have started or completed ACM remediation – an increase of one since the end of April. Of these, 484 buildings (94% of all buildings) have removed ACM cladding – an increase of one since the end of April.

There are an estimated 28,000-31,300 dwellings in private and social sector buildings that have completed remediation, and a further 4,100-4,300 dwellings in occupied private and social sector buildings that have yet to be remediated.

Driving ACM remediation forward

There are 22 buildings yet to start ACM remediation (4% of all buildings) - no change since the end of April. One building is vacant so does not pose a risk to resident safety.

Occupied buildings that have:	Undergone enforcement action	Undergone enforcement action supported by Joint Inspection Team	Forecast start available	Forecast to start by the end of June 2025
Total	7	4	17	0

Table 3: Enforcement action and forecast start dates for occupied high-rise buildings yet to start ACM remediation, 31 May 2025

Of the 21 high-rise occupied buildings yet to start ACM remediation:

• Four buildings are forecast to start works by the end of December 2025, and two of these have had local authority enforcement action taken against them.

• An additional 13 buildings are forecast to start works by the end of 2026, and four of these have had local authority enforcement action taken against them.

• One building without a forecast start date has had local authority enforcement action taken against it.

• Of the remaining three buildings, one has been determined as in scope of the ACM monitoring programme in 2024, and the other two in 2025. The department continues to engage with building owners to ensure their remediation is progressed.

These forecast estimates are based on information provided by building owners and agents and may change as further information is received. These estimates can also change as a result of buildings being newly identified. The department continues to engage with building owners to start remediation works on site as soon as possible, and will continue to support local authorities and fire and rescue services in the use of their enforcement powers.

Figure 8: 96% of buildings are forecast to have started or completed ACM remediation works by the end of June 2025.

ACM remediation progress by year of identification

Figure 9: 99% of buildings identified at 31 December 2022 have started or completed remediation compared to 96% of all buildings in the programme.

Since 31 December 2021, 36 further high-rise residential buildings have been identified with ACM cladding systems unlikely to meet Building Regulations and have moved into scope of the Building Safety Programme. Of these, six buildings were identified in 2022, eight buildings were identified in 2023, 19 buildings were identified in 2024 and three buildings were identified in 2025.

Year of identification	Number of buildings identified	Cumulative number
2017 - 2019	428	428
2020	31	459
2021	22	481
2022	6	487
2023	8	495
2024	19	514
2025	3	517
Total	517	517

Table 4: Buildings with unsafe ACM cladding by year of identification, 31 May 2025

ACM remediation by sector

Figure 10: 99% of the 163 social sector residential buildings in the ACM programme have started or completed remediation, compared to 93% of the 253 private sector residential buildings.

Building Safety Fund

Information in this section is correct as at 31 May 2025 and shows a monthly update from the previous publication.

Figure 11: 70% of buildings proceeding with an application for funding in the BSF have started or completed remediation, with 53% having completed remediation works on site.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	274	35%	274	35%
Remediation complete: awaiting building control sign-off	137	18%	411	53%
Remediation started	133	17%	544	70%
Remediation plans in place	121	16%	665	86%
Intent to remediate	107	14%	772	100%
Total	772	100%	772	100%

Table 5: Remediation status of buildings within the Building Safety Fund, 31 May 2025

BSF remediation: key statistics

As at 31 May 2025, 772 buildings were assessed as eligible and are proceeding with an application for funding from the Building Safety Fund. The remaining 2,917 buildings registered with the fund are either ineligible (1,115), withdrawn (1,608), in review or have given insufficient evidence (15), or have transferred to the Cladding Safety Scheme (179).

Of the 2,917 buildings that registered with the Building Safety Fund and are not currently proceeding with an application for funding, 456 buildings which were assessed as eligible have been transferred to developers.

As at 31 May 2025, 179 buildings have transferred to the Cladding Safety Scheme for their remediation (where works have not yet started on site) and are progressing through the CSS process, an increase of 58 since the end of April  The number of buildings reported as transferred from the BSF to the CSS in this section of the data release may not be the same as the number of eligible CSS buildings that have transferred from the BSF in the CSS section of the data release.  This is because different programmes may define buildings differently due to how they operate. One building has also withdrawn from the CSS since transferring from the BSF.

Of the 772 buildings proceeding with an application for funding in the Building Safety Fund:

• 162 buildings (21%) are remaining in the fund with developers set to reimburse the cost of remediation.

• Seven buildings (1%) are anticipated to be transferred to developers.

Of the 772 buildings proceeding with an application for funding, 183 buildings have been assessed with a Fire Risk Appraisal for External Walls (FRAEW), and 589 have been assessed under the BSF 2020 CAN criteria. It is possible for a building to submit a new application to the fund after having completed remediation, if it originally applied under the BSF 2020 CAN criteria. Therefore, buildings could be double counted. As of 31 May 2025 one building had undertaken remediation work from both application periods, so is double counted. Further details are available in the technical note.

Of the 772 buildings proceeding with an application for funding, 544 buildings (70%) have either started or completed remediation works – no change since the end of April.

Of the 544 buildings that have started or completed remediation as at 31 May 2025:

• 133 buildings (17% of all buildings) have started remediation.

• 411 buildings (53% of all buildings) have completed remediation – an increase of four since the end of April. Of these, 274 buildings (35% of all buildings) have received building control sign off.

There are 228 eligible buildings proceeding with an application for funding that have not started remediation, of which:

• 121 (16% of all buildings) have remediation plans in place.

• 107 (14% of all buildings) have reported an intent to remediate.

There are an estimated 66,000 dwellings in buildings that are eligible and proceeding with an application for funding in the BSF.

BSF remediation progress over time

Figure 12: 22 more buildings proceeding with an application for funding in the BSF have started or completed remediation since the end of May 2024

Since the end of May 2024:

• 139 fewer eligible buildings are proceeding with an application for funding from the Building Safety Fund.

• 22 more eligible buildings have started or completed remediation, and 124 more eligible buildings have completed remediation.

BSF remediation by tenure

Figure 13: 90% of social sector buildings in the BSF, including buildings with a financial viability claim, have started or completed remediation compared to 66% of private sector buildings.

Social sector buildings receiving full government funding for their remediation due to financial viability claims were, up until May 2024, included in private sector buildings counts. Further detail is available in the accompanying technical note.

The proportion of social sector buildings in the BSF that have started or completed remediation increased in May 2025 due to 58 social sector buildings that have not yet started remediation transferring to the CSS.

Cladding Safety Scheme

Information in this section is correct as at 31 May 2025 and shows a monthly update from the previous publication.

Figure 14: There are 6,784 buildings at different stages of the Cladding Safety Scheme, including 258 buildings with live applications and 732 eligible buildings, of which 123 buildings have started or completed works, with 38 having completed works.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	38	5%	38	5%
Works started	85	12%	123	17%
In programme	609	83%	732	100%
Total	732	100%	732	100%

Table 6: Remediation status for buildings within the Cladding Safety Scheme, 31 May 2025

Cladding Safety Scheme: Key statistics

As at the end of May 2025, there were 6,784 buildings in the different stages of the Cladding Safety Scheme (732 eligible buildings and 6,052 pre-eligible buildings). Of the 6,052 pre-eligible buildings:

• 5,794 buildings are in the pre-application stage.

• 258 buildings have a live application and are progressing through the eligibility stages.

There are 732 eligible buildings as at the end of May 2025, an increase of 76 since the end of April. 58 of the newly eligible buildings this month have been transferred from the BSF. In total, 166 of the eligible buildings in the CSS have been transferred from the BSF.

The number of eligible CSS buildings reported as transferred from the BSF to the CSS in this section of the data release may not be the same as the number of buildings that have transferred from the BSF to the CSS in the BSF section of the data release. This is because different programmes may define buildings differently due to how they operate. One building has also withdrawn from the CSS since transferring from the BSF.

Of the 732 eligible buildings:

• 656 buildings (90% of eligible buildings) have signed Grant Funding Agreements (GFA) - an increase of 25 since the end of April.

• Of these, 467 buildings (64% of all eligible buildings) have received a pre-tender support payment – an increase of 26 since the end of April.

• 123 buildings have started or completed remediation works on site – an increase of five since the end of April.

• Of these, 38 buildings have completed remediation works on site, including those awaiting building control sign-off – an increase of five since the end of April.

Four eligible buildings are in Northern Ireland, with the remainder in England.

Height breakdown

Figure 15: 23% of eligible 11-18m buildings in the CSS have started or completed remediation, compared to 5% of eligible 18m+ buildings.

Tenure breakdown

Figure 16: 17% of eligible social sector buildings in the CSS have started or completed remediation, the same proportion as eligible private sector buildings.

Developer-Led Remediation

Information in this section received by developers is correct as at 30 April 2025. Information in this section received from other programmes that relate to developer-led remediation (where cladding remediation is being carried out in a government funded remediation programme and the developer will subsequently pay for the works) is correct as at 31 May 2025.

The estimates in this section include some buildings which are also included in other sections of this data release e.g., those reported under the following sections: ‘ACM Remediation’, ‘Building Safety Fund’, ‘Cladding Safety Scheme’ and ‘Social Housing Sector’.

Figure 17: 49% of buildings in the developer remediation contract have either started or completed remediation works on life-critical fire safety risks, with 25% having completed remediation works on site.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	430	21%	430	21%
Remediation complete – awaiting building control sign-off	86	4%	516	25%
Remediation started	481	24%	997	49%
Remediation not started – plans in place	372	18%	1369	68%
Remediation not started – no plans in place	656	32%	2025	100%
Total	2025	100%	2025	100%

Table 7: Remediation status of buildings requiring works under the developer remediation contract, 31 May 2025. Percentages may not sum to 100% due to rounding.

Developer remediation: key statistics

The estimates in this section are based on a combination of self-reported data submitted by developers and information that has been imputed from Building Safety Fund (BSF) and ACM programme data. A building is identified with life-critical fire safety defects if:

• The developer has self-reported that works are (or were) required on the building

• The developer has reported a remediation status of planned, started or complete

• The building is eligible for funding in the BSF or is being monitored under the ACM programme (including buildings developers have agreed to re-imburse taxpayers for);

• The building has had money paid out by the BSF or ACM remediation funds.

Furthermore, where a building has been identified with life-critical fire safety defects but the developer has not reported a defect type in the question ‘What do the issues relate to’ it is assumed that the defect type relates to cladding.

Other data, unless otherwise stated, is based on self-reported data by developers in their latest data report.

As at 31 May 2025, 54 developers have signed the developer remediation contract, although two developers who merged are reported as one in this release. There are 4,636 buildings covered by the developer remediation contract. Of these, 2,025 buildings have been identified as having life-critical fire safety defects that developers are obligated to remediate or pay to remediate – an increase of 181 since the April data release. Of the 2,025 buildings identified as having life-critical fire safety risks:

• 516 (25%) are reported to have completed remediation– an increase of 15 since the April data release. Of the 516 buildings that are reported to have completed remediation, 430 buildings (21% of all buildings with defects) are reported to have received building control sign-off.

• 997 (49%) are reported to have started or completed remediation – an increase of 40 since the April data release.

• 372 (18%) are reported to have not started remediation but have plans in place – an increase of two since the April data release.

• 656 buildings (32%) have not started and have no plans in place - an increase of 139 since the April data release, due to developers identifying more buildings with defects between their January 2025 and April 2025 data returns.

Although information from developers is received quarterly, these statistics are subject to change and are updated monthly as information from other programmes which relate to remediation is updated monthly.

The 2,025 buildings identified as requiring remediation have an estimated cost of remediation of around £4.1 billion. This is an increase of £0.2bn since reported in the April data release. This increase is due to more buildings being found with life-critical fire safety defects. This cost is based on the self-reported cost of works in the developer data report. However, if the cost is not known it is imputed based on the average known reported cost by developers by height band of building.

There are an estimated 128,900 dwellings in buildings with defects that developers are committed to remediate. Of these, there are an estimated 67,300 dwellings in buildings that are reported as having either started or completed remediation works. This number of dwellings is based on the self-reported data in the developer data report. However, if this information is not known it is imputed based on the average number of dwellings reported by developers by height band of building.

Based on start and completion dates reported by developers, 541 buildings which have not yet started are reportedly expected to start works between 1 May 2025 and 30 April 2026, and 342 buildings which have not yet completed are reportedly expected to complete their remediation between 1 May 2025 and 30 April 2026.

445 buildings have transferred from the Building Safety Fund to developers, no change since the April data release:

• 56 (13%) have completed remediation - an increase of seven since the April data release. Of these 56, 42 buildings (9% of all buildings) are reported to have received building control sign-off.

• 181 (41%) have started or completed remediation – an increase of 10 since the April data release.

• 112 (25%) are reported to have not started remediation but have plans in place - a decrease of six since the April data release.

• 70 (16%) are reported to have not started remediation and have no plans in place – a decrease of two since the April data release.

• 82 (18%) have not been identified by developers as having life-critical fire-safety defects – a decrease of two since the April data release.

The 445 buildings in the developer remediation contract differs from the 456 reported in the Building Safety Fund section of the data release, due to developers defining buildings differently to in the Building Safety Fund. The same building structures are included in both sections of the release.

Height breakdown

Figure 18: 56% of the 18m+ buildings have started or completed remediation, compared to 42% of the 11-18m buildings.

Cladding defects

The estimates in this section are based on a combination of self-reported data submitted by developers and information that has been imputed from Building Safety Fund (BSF) and ACM programme data (please see above for further details).

Where a building has been identified with life-critical fire safety defects but the developer has not reported a defect type in the question ‘What do the issues relate to’ it is assumed that the defect type relates to cladding.

Some remediation being undertaken by developers on buildings with life-critical fire safety risks relate to non-cladding defects. When excluding buildings reported to have only non-cladding defects, there are 1,526 buildings which developers have reported as having unsafe cladding – an increase of 75 since the April data release. Of these:

• 448 (29%) are reported to have completed remediation– an increase of seven since the April data release. Of the 448 buildings that are reported to have completed remediation, 382 buildings (25% of all buildings with defects) are reported to have received building control sign-off.

• 824 (54%) are reported to have started or completed remediation – an increase of 35 since the April data release.

• 325 (21%) are reported to have not started remediation but have plans in place – an increase of three since the April data release.

• 377 buildings (25%) have not started and have no plans in place - an increase of 37 since the April data release, due to developers identifying more buildings with defects between their January 2025 and April 2025 data returns.

These estimates are subject to change each month due to the monitoring of buildings under the developer remediation contract in other remediation programmes.

Self-reported information

The figures reported for developers above combine information received directly from developers as well as information held by the department from other programmes which relate to remediation. This is to help better estimate a figure for buildings requiring remediation under the developer remediation contract. The figures reported above will also include buildings which are being remediated solely under a government remediation scheme, for which the developer will reimburse taxpayers.

The estimates in this section report on buildings which have been self-reported by developers as requiring remediation to life-critical fire safety risks and are updated quarterly . The estimates report on buildings which are being remediated by the developer directly, rather than being remediated through a government fund and being reimbursed to taxpayers. However, some buildings being remediated under a government remediation programme will be included if other relevant fire safety defects have been found, which were not eligible for a government remediation programme and which the developer is remediating themselves. Developers have self-reported that 1,892 buildings require life-critical fire safety remediation, which will be directly remediated by the developer, an increase of 192 since the April data release. Buildings that are being remediated in the BSF or ACM programme, but are also reported to have other non-EWS life-critical fire safety defects by the developer will be included in these statistics. Of these 1,892 buildings being directly remediated by the developer:

• 440 buildings (23%) have completed remediation, an increase of 21 since the April data release. Of these, 367 buildings (19% of all buildings with defects) are reported to have received building control sign-off.

• 882 buildings (47%) have started or completed remediation, an increase of 45 since the April data release.

• 372 buildings (20%) have not started remediation but have a plan in place, an increase of 8 since the April data release.

• 638 buildings (34%) have not started and have no plans in place, an increase of 139 since the April data release, due to developers identifying more buildings with defects between their January 2025 and April 2025 data returns.

Further information on the progress developers have made regarding the buildings they’ve reported on is available in the accompanying management information tables. Additionally, alongside the Building Safety Remediation Data Release, MHCLG publishes a ‘developer progress chart’ which allows you to compare the progress developers have made on determining whether works are required on buildings they are responsible for, as well as progress being made on buildings requiring works that have started on site. This chart represents the self-reported information shown above and is published in the  accompanying dashboard.

Social Housing Sector

Information in this section received by Registered Providers of Social Housing is correct as at 31 March 2025. Information in this section received from other programmes that relate to social housing is correct as at 31 May 2025.

A number of Registered Providers have made revisions to their data in recent quarters, and this could continue in subsequent quarters. We are working with data providers to improve the survey questions, validation checks and adherence to guidance, as well as exploring improved methods of reporting the data to improve data quality going forwards.

The estimates in this section include some buildings which are also included in other sections of this data release e.g., those reported under the following sections: ‘ACM Remediation’, ‘Building Safety Fund’, ‘Cladding Safety Scheme’ and ‘Developer Remediation’.

From June 2024, the estimates in this section of the release include buildings which have been reported by Registered Providers to have completed remediation since 14 June 2017 but prior to the most recent assessment. They also include social buildings the department has identified in other remediation programmes as having unsafe cladding and are also being monitored in those programmes.

Figure 19: 44% of social buildings identified to have unsafe cladding have started or completed remediation works, with 34% (of identified buildings) having completed remediation works on site.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	904	32%	904	32%
Remediation complete – awaiting building control sign-off	49	2%	953	34%
Remediation started	273	10%	1,226	44%
Remediation works planned	997	36%	2,223	80%
Remediation plans unclear from survey	571	20%	2,794	100%
Total	2,794	100%	2,794	100%

Table 8: Remediation status of social buildings with unsafe cladding, 31 May 2025.

Social Housing remediation: Key statistics

The estimates in this section are based on a combination of self-reported data submitted by registered providers and information that has been imputed from Building Safety Fund (BSF), Cladding Safety Scheme, ACM programme data and data submitted by developers under the Developer Remediation Contract. A building is identified with life-critical fire safety defects if the registered provider has self-reported cladding defects, the building is eligible for funding in the BSF, CSS or is being monitored under the ACM programme, or the building is reported by developers with cladding defects in their latest quarterly data report.

548 registered providers of social housing were invited to respond to this round of a survey on their 11m+ stock. 939 small registered providers were excluded from this round of the survey because they had indicated that they were not the Responsible Entity for any 11m+ residential buildings.

As at 31 May 2025, 2,794 social buildings 11 metres and over in height have been identified as having life-critical fire-safety cladding defects – an increase of 75 buildings since the April data release. Of the 2,794 buildings identified with unsafe cladding:

• 1,895 were reported by Registered Providers to have unsafe cladding at the time of their most recent assessment. This could include buildings whose remediation work has been completed but await building control sign off and those awaiting a subsequent assessment to confirm no outstanding life-critical fire-safety defects. Additional information on these buildings is available in the accompanying management information tables, social housing provider release document and the Regulator for Social Housing’s publication on Fire safety remediation in social housing in England.

• 762 were reported by Registered Providers to have unsafe cladding since June 2017 but prior to the most recent assessment, which have since been remediated.

• 137 were identified under other remediation programmes (BSF, ACM, CSS or developer remediation) as having unsafe cladding and are also being monitored in those programmes.

Of the 2,794 buildings identified to have unsafe cladding:

• 953 buildings (34%) are reported to have completed remediation – an increase of 96 buildings since reported in the April data release. Of these 953 buildings, 904 (32% of all buildings with defects) are reported to have received building control sign-off – an increase of 116 buildings since reported in the April data release.

• 1,226 buildings (44%) buildings are reported to have started or completed remediation – a decrease of two buildings since reported in the April data release. While 109 buildings are reported to have started or completed remediation when they previously were not reported to have started remediation (64 buildings), or have cladding defects (45 buildings), this was offset by the status of 111 buildings changing from having started or completed remediation to not having cladding defects or no longer being reported in the survey (33 buildings), or to not having started remediation (78 buildings).

• 997 buildings (36%) buildings are reported to have not started remediation but have plans in place – an increase of five buildings since reported in the April data release.

Although information from registered providers of social housing is received quarterly, these statistics will be updated monthly as information from other programmes which relate to social building remediation is updated monthly.

Height breakdown

Figure 20: 51% of the 18m+ social buildings identified to have unsafe cladding have started or completed remediation, compared to 35% of the 11-18m buildings.

Additional information available for individual social housing providers is available in the accompanying management information tables and social housing provider release document.

The estimates in this section exclude four buildings identified with unsafe cladding which have been decanted prior to demolition.

Social Housing remediation: Data reported by registered providers of social housing

The estimates in this section include buildings self-reported by registered providers in the latest survey (as at 31 March 2025) as having unsafe cladding since June 2017.

Registered Providers reported that 2,657 have been found to have unsafe cladding since June 2017. Of these, 762 completed remediation prior to their most recent building works assessment and 1,895 buildings have been identified with unsafe cladding at the time of the most recent building works assessment. Of the 2,657 buildings:

• 893 buildings (34%) that were identified with unsafe cladding since June 2017) are reported to have completed remediation – an increase of 93 buildings since reported in the 31 December 2024 Social Housing Remediation data release.

• 1,148 buildings (43%) are reported to have started or completed remediation – a decrease of seven buildings since reported in the 31 December 2024 Social Housing Remediation data release. While 103 buildings are reported to have started or completed remediation, when they previously were not reported to have started remediation (57 buildings), or have cladding defects (46 buildings), this was offset by the status of 110 buildings changing from having started or completed remediation to not having cladding defects or no longer being reported in the survey (33 buildings), or to not having started remediation (77 buildings).

• 984 buildings (37%) are reported to have not started remediation but have plans in place – an increase of 24 buildings since reported in the 31 December 2024 Social Housing Remediation data release.

Enforcement

Information in this section is correct as at 20 May 2025 and shows a monthly update from the previous publication.

This section includes local authority enforcement action on buildings 11 metres or over in height. Up until June 2024 only enforcement action taken on buildings over 18m in height was reported on.

Local authority enforcement action: key statistics

As at 20 May 2025, enforcement action has been, or is being, taken under the Housing Act against 553 buildings over 11m with suspected unsafe cladding - an increase of eight since the end of April. Of these, 158 buildings have had 161 inspections with Joint Inspection Team support – an increase of three inspections since the end of April.

Of the 553 buildings where a local authority had undertaken an inspection, we are aware that:

• 125 had a Category 1 HHSRS rating

• 373 had a Category 2 HHSRS rating

As several buildings have now had two or more inspections, from August 2024, only the most recent inspection’s category rating is reported on, as this is used to gauge the risks of the buildings in each Local Authority’s portfolio. Additional inspections are still reported as enforcement action.

Of the 553 buildings, we are aware that at least 206 improvement notices, 59 hazard awareness notices and 1 prohibition order have been served to date. Some buildings may have received multiple notices. We understand that 49 of the improvement notices have been subject to appeals.

Accompanying dashboard

An additional interactive dashboard showing the information in this release is available.

Accompanying tables 

 Additional management information tables are available.

The tables provide data on:

• the remediation progress of high-rise (18 metres and over) residential buildings identified with unsafe Aluminium Composite Material (ACM) cladding systems,
• the remediation progress of high-rise residential buildings with unsafe non-ACM cladding systems that are pursuing successful applications from their Building Safety Fund (BSF) Registration,
• data on buildings in the Cladding Safety Scheme (CSS),
• the remediation progress of buildings covered by the developer remediation contract, including a developer-by-developer breakdown,
• the remediation progress of buildings monitored under the social housing survey, including a provider-by-provider breakdown,
• the progress of the Waking Watch Relief Fund and Waking Watch Replacement Fund, and
• building safety enforcement action undertaken by Local Authorities in England.

Related Statistics 

BRE testing

Previously, MHCLG published a table on samples received by BRE for testing which has been discontinued as of October 2019 (see technical notes document). The data table of descriptions of large-scale system tests undertaken by the BRE and the number of buildings with similar cladding systems was discontinued in November 2020.

Developer data

MHCLG has published data provided by developers who have signed the developer remediation contract. This release provides information on the number of buildings in scope of the contract, assessments in place, number of buildings requiring remediation works and status of those works by developer.

English Housing Survey: Feeling Safe from Fire

MHCLG has published the English Housing Survey 2020 to 2021: Feeling Safe from Fire report, providing information on the extent to which people feel safe from fire in their homes.

Estimating the prevalence and costs of external wall system life-safety fire risk in mid-rise residential buildings

MHCLG has published data on the prevalence of external wall system life-safety fire risk in mid-rise (11-18m) residential buildings in England, and the estimated cost as at July 2021 to remediate or mitigate these buildings.

EWS1 requirements on residential buildings in England

MHCLG has published information on estimates of EWS1 requirements on residential buildings in England, including indicative analysis on the cladding coverage of residential buildings and the number of leasehold dwellings in those buildings.

EWS1 (or equivalent) lender data on mortgage valuation for flats

MHCLG publishes quarterly data on the numbers of EWS1 forms (or equivalent) that have been required on mortgage valuations for flats.

Population and dwelling numbers

Previously, MHCLG published estimates on population and dwelling numbers of residential buildings in the Building Safety Programme data release. Should these figures change, MHCLG will publish a new update.

RSH publication

On 20 March 2025, the Regulator of Social Housing published findings from the Fire Safety Remediation Survey (FRS) for buildings 11 metres and over in height as at 31 December 2024, which opened to all landlords on 13 December 2024 and closed on 22 January 2025.

Social housing provider data

MHCLG has published data provided by social housing providers on remediation progress of their building stock. This release provides information on the number of buildings, assessments in place, number of buildings requiring remediation works and status of those works by social housing provider.

Waking Watch costs

On 16 October 2020, MHCLG published information on Waking Watch costs based on data collected through a range of external stakeholders from July to September 2020.

Cladding remediation unit costs

On 17 December 2024, MHCLG published data on cladding remediation unit costs, providing data on costs per square metre of cladding remediated for high-rise non-ACM buildings, including analysis by cladding area and cost categories.

Technical note 

Please see the accompanying technical notes document for further details.