Research and analysis

Building Safety Remediation: monthly data release - May 2026 (Accessible Version)

Published 24 June 2026

Applies to England

Date of next publication: 9.30am on Wednesday 29 July 2026

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

Headlines

Overall remediation

As at the end of May 2026, there are 4,411 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 33 since the end of April 2026. This is an estimated 61-76% of all buildings 11 metres and over in height expected to be remediated as part of MHCLG’s remediation programmes.

Since the department first began reporting on all five remediation programmes in October 2023, the overall number of 11m+ buildings with unsafe cladding whose remediation progress is being monitored by MHCLG is 614 more.

Overall, 2,331 buildings (53% of monitored buildings) have either started or completed remediation works. Of these, 1,672 buildings (38% of monitored buildings) have completed remediation works.

Figure 1: 4,411 11m+ buildings have been identified with unsafe cladding, and there are an estimated 1,400-2,900 11m+ buildings expected to be remediated as part of MHCLG’s remediation programmes yet to be confirmed as eligible for a remediation programme.

Figure 2: Of the 4,411 buildings identified with unsafe cladding, 2,331 (53% of monitored buildings) have started or completed remediation works, of which 1,672 (38% of monitored buildings) have completed remediation works.

Note: 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 total number of 11m+ buildings identified with unsafe cladding decreased between November 2025 and December 2025 due to a change in the data collection and categorisation of social sector buildings used in our monitoring and reporting. The overall remediation progress figures from December 2025 are therefore not directly comparable to prior months. Fluctuations in the social self-funded data are expected over the coming months, which will affect the overall remediation progress figures. Further information is available in the Technical Note.

ACM remediation – monthly update (as at end May 2026) since previous publication.

As at 31 May 2026 of the 516 high-rise (18 metres and over in height) residential and publicly owned buildings with ACM cladding systems, unlikely to meet Building Regulations, 500 (97%) have either started or completed remediation works, no change since the end of April.

Of these, 472 buildings (91%) have completed ACM remediation, including those awaiting building control sign-off, an increase of five since the end of April.

There are 16 buildings yet to start ACM remediation (3% of all buildings), no change since the end of April. Two buildings are vacant so do not pose a risk to resident safety, 11 occupied buildings have forecast start dates, two further buildings have had local authority enforcement action taken against them and the remaining building came into scope in 2026.

Building Safety Fund (BSF) – monthly update (as at end May 2026) since previous publication.

As at 31 May 2026, of the 640 high-rise (18 metres and over in height) residential buildings proceeding with an application for funding through the Building Safety Fund, 481 (75%) have completed remediation works, including those awaiting building control sign-off, and 76 buildings (12%) in the BSF have started remediation works on non-ACM cladding.

Overall, 557 high-rise buildings (87%) in the BSF have either started or completed remediation works on non-ACM cladding, no change since the end of April. Of these, 481 buildings (75% of buildings) have completed remediation works, an increase of 11 since the end of April.

Cladding Safety Scheme (CSS) – monthly update (as at end May 2026) since previous publication.

As at 31 May 2026, 1,325 buildings 11 metres and over in height have been assessed as eligible for the Cladding Safety Scheme (including 270 buildings that have transferred from the BSF), an increase of 86 since the end of April. Of these, 367 buildings (28%) have either started or completed remediation works, an increase of four since the end of April. Of these, 112 buildings (8%) have completed remediation works, including those awaiting building control sign-off, an increase of 12 since the end of April.

The CSS continues to investigate and pull in potentially eligible buildings. There are a further 2,179 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, 1,234 buildings are progressing through eligibility checks, and 945 buildings are in the pre-application stage.

There are fewer buildings in the pre-application stage than last month, because Homes England have updated their set of statuses used to indicate the current state or outcome of buildings applying to the scheme, to reflect new functionality available in the National Remediation System.

Developer remediation – data received from developers as at 30 April 2026. Data received from other programmes relating to developer-led remediation is as at 31 May 2026.

As at 31 May 2026, 2,604 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 51 since reported in the April data release.

Of the 2,604 buildings identified as having life-critical fire safety defects, developers reported that 1,264 (49%) have either started or completed remediation works, an increase of 83 since reported in the April data release. Of these, 596 (23% of buildings) are reported to have completed remediation works, an increase of 75 since reported in the April data release. From April 2026, developers must now report progress separately for cladding and non-cladding defects, whereas previously an overall building-level status was reported. Further information is available in the Developer-led remediation section of the data release.

When excluding buildings reported with only non-cladding defects, there are 1,815 buildings which developers have reported as having unsafe cladding, a decrease of six since reported in the April data release. Of which 862 (47%) are reported to have started or completed remediation, a decrease of 97 since reported in the April data release, including 566 (31% of buildings) which are reported to have completed remediation, an increase of 133 since reported in the April data release. The decrease of 97 and increase of 133 are driven by improved reporting requirements for Developer buildings with both cladding and non-cladding defects. Further information is available in the Overall remediation: key statistics section of the data release.

Social self-funded remediation – monthly update (as at end May 2026) since previous publication.

As at 31 May 2026, there are 566 social buildings identified with unsafe cladding where remediation is self-funded by registered providers of social housing – a decrease of four since the end of April. Further information is available in the social self-funded remediation section of the data release.

Of these, 387 (68%) are reported to have started or completed remediation works - an increase of three since the end of April.

Registered providers of social housing are working with Homes England to finish compiling their records of buildings requiring remediation on the digital platform, the National Remediation System (NRS). While work is underway to migrate data to the NRS, fluctuations in the remediation progress figures for social buildings where registered providers are self-funding remediation is expected. Further information is available in the Technical Note.

Enforcement – monthly update (as at 22 May 2026) since previous publication

As at 22 May 2026, local authority enforcement action has been, or is being, taken under the Housing Act 2004 against 898 buildings over 11m with suspected unsafe cladding, an increase of 18 since the end of April.

Introduction

This Data Release provides data on:

• The estimated number of residential buildings 11 metres and over in height in England that have or had unsafe cladding requiring remediation and the estimated cost to remediate them

• 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 the applications for and remediation of medium-rise (11-18 metres in height) and high-rise residential buildings in England, and Northern Ireland, 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 as being self-funded

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

• In additional management information tables only, the progress of the Waking Watch Relief Fund and Waking Watch Replacement Fund. From June 2025 this includes data on the Waking Watch Replacement Fund 2023

The data in Figures 3 and 4 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 as being self-funded.

The figures in this publication are correct as at the specified dates. Remediation progress on the ACM programme, BSF, CSS and social self-funded buildings will be updated monthly, and remediation progress on the developer remediation contract will be updated quarterly.

From June 2025 the Building Safety Remediation data release includes estimates on the number of residential buildings 11 metres and over in height in England with unsafe cladding requiring remediation. These estimates have been updated in the April 2026 Building Safety Remediation data release, and are not expected to change frequently.

From November 2025 the Building Safety Remediation data release includes estimates on the cost of external wall system remediation of residential buildings 11 metres and over in height in England. These estimates have not been updated since the November 2025 Building Safety Remediation data release. These estimates will be updated in the future, but are not expected to change frequently.

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:

• 29 July 2026

• 26 August 2026

• 30 September 2026

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:

• Estimates of the number of buildings that have or had unsafe cladding to be remediated in a government remediation programme

• Estimates of the total cost to remediate buildings that have or had unsafe cladding by funding source

• 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 social buildings over 11m in height whose cladding remediation is funded by registered social housing providers

Estimated number of buildings with unsafe cladding

Information in this section shows MHCLG’s best estimates as at March 2026 and shows no update from the previous publication.

Key statistics:

MHCLG’s best estimates, as of March 2026, are that there are between 5,900 and 7,400 residential buildings, containing dwellings, 11 metres and over in height that have or had unsafe cladding requiring work in England. This equates to an estimated 8-14% of the residential building stock, containing dwellings, over 11 metres in England.

Of these:

• An estimated 2,800 - 3,700 buildings are 11-18m (5-9% of the estimated 39,000 - 59,000 11-18m buildings)

• An estimated 3,100 - 3,700 buildings are 18m+ (26-31% of the estimated 12,000 18m+ stock)

The estimates of the number of 11m+ buildings with unsafe cladding, as of March 2026, replace the estimates last published in June 2025. More information on the methodology is available in the Technical Note.

Estimates of buildings to be remediated in MHCLG’s remediation programmes:

MHCLG estimate there to be between 5,800 and 7,300 residential buildings, 11 metres over in height that have or had unsafe cladding that will be or have been remediated or mitigated as part of the department’s five remediation programmes, and therefore will be or are already monitored in the Building Safety Remediation monthly data release.

These figures differ from those in the Key Statistics section above because:

• 18m+ hotels, student accommodation or public buildings identified with unsafe ACM cladding are included in the estimates in this section, because these buildings are remediated through the ACM programme, but are excluded from the Key Statistics section above because the buildings do not contain dwellings. At the time the estimate was made there were 100 of these buildings

• The estimated number of 11m+ buildings which are assumed to be remediated privately, outside of one of the department’s remediation programmes, are included in the Key Statistics section above but excluded from the estimates in this section

Of these:

• An estimated 2,700 - 3,600 buildings are 11-18m

• An estimated 3,100 - 3,700 buildings are 18m+

Table 1: Estimated number of residential buildings with unsafe cladding expected to be remediated or mitigated as part of MHCLG’s remediation programmes, over 11 metres with unsafe cladding, by height, England, March 2026. These figures include non dwelling 18m+ buildings with unsafe cladding, and excludes buildings assumed to be remediated outside of a remediation programme. Totals do not sum due to rounding.

Height	Low Estimate	High Estimate
11-18m	2700	3600
18m+	3100	3700
Total 11m+	5800	7300

Table 2: Estimated proportion of buildings with unsafe cladding expected to be remediated or mitigated in a government remediation programme that are currently monitored in a government remediation programme, 31 May 2026. Proportions are calculated from unrounded estimates so may not be derivable from rounded estimates in the data release.

Height	Number of buildings currently monitored	As a proportion of the low estimate	As a proportion of the high estimate
11-18m	1983	73%	55%
18m+	2428	78%	66%
Total 11m+	4411	76%	61%

As at the end of May 2026, MHCLG is monitoring the remediation progress of an estimated 61-76% of residential buildings with unsafe cladding expected to be remediated or mitigated in the department’s remediation programmes. More information on the remediation progress of buildings MHCLG are currently monitoring can be found in the Overall Remediation section of the data release.

These figures include buildings that have already completed remediation or mitigation of unsafe cladding.

Estimated cost of external wall system remediation of 11m+ residential buildings in England

Information in this section shows MHCLG’s best estimates as at March 2025 and remains unchanged from the previous publication.

Key statistics:

As of March 2025, MHCLG estimates that it will cost between £11.8bn and £22.7bn to remediate residential buildings, containing dwellings, 11 metres and above in height that have or had unsafe cladding in England.

Of this total estimated capital cost:

• An estimated £6.7bn - £15.2bn will have been funded by government once all works have been completed (56% - 67% of the total capital costs)

• An estimated £5.2bn - £7.4bn will have been funded by non-government actors once all works have been completed (33% - 44% of the total capital costs). This includes developers, registered providers of social housing and other actors

These costs relate to buildings which will be or have been remediated or mitigated as part of the department’s five remediation programmes. The costs also include an estimated number of 11m+ buildings which are assumed to be remediated privately, outside of one of the department’s remediation programmes. The costs estimates relate to the estimated number of buildings requiring remediation and accessing government funding as of March 2025. They include the estimated cost of works to-date as well as future works. The estimates account for the change in funding eligibility criteria where social landlords will now receive equal access to government remediation funding as private landlords. They exclude costs which fall outside the scope of remediating buildings 11 metres and above in height that have or had unsafe cladding in England.

These estimates have not been updated to reflect the updated estimates, as of March 2026, of the number of 11m+ buildings with unsafe cladding. The cost estimates will be updated in the future.

These estimates represent our current best estimates and will be subject to change as more information becomes available. They update estimates previously published in the National Audit Office (NAO) report “Dangerous cladding: the government’s remediation portfolio” in November 2024.

More information on the methodology is available in the Technical Note.

Table 3: Estimated capital cost of external wall system works to residential buildings over 11 metres with unsafe cladding to be, and which have been, remediated or mitigated, by funding source, England, March 2025, £bn (nominal terms, nearest £0.1bn).

Funding Source	Low Estimate	Central Estimate	High Estimate
Government Programmes	6.7	8.9	15.2
Non-government actors	5.2	6.1	7.4
Total	11.8	15.1	22.7

Table 4: Estimated proportion of capital costs of external wall system works to buildings over 11 metres with unsafe cladding expected to be, and which have been, remediated or mitigated, by funding source, England, March 2025.

Funding Source	Low Estimate	Central Estimate	High Estimate
Government Programmes	56%	59%	67%
Non-government actors	44%	41%	33%
Total	100%	100%	100%

Funding sources available to MHCLG for remediation:

It is estimated that under current plans, MHCLG will have £9.2bn available to fund the remediation of external wall system defects.

This includes:

• a £5.2bn Exchequer contribution

• an estimated £0.7bn in refunds from developers

• a £3.4bn Building Safety Levy revenue target

As cost estimates continue to be updated, the Levy revenue target will be reviewed and adjusted such that funding available for remediation aligns to government expenditure.

Overall remediation progress

Figure 3: 2,331 residential buildings (53% of identified buildings) have started or completed remediation on unsafe cladding, of which 1,672 (38% of identified buildings) have completed remediation works.

Table 5: Remediation progress for 11m+ buildings identified with unsafe cladding which are in the ACM programme, eligible for the Building Safety Fund and the CSS, remediated under the developer remediation contract and self-funded by registered providers of social housing, England, 31 May 2026.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	1672	38%	1672	38%
Remediation underway	659	15%	2331	53%
In programme	2080	47%	4411	100%
Total	4411	100%	4411	100%

The in programme figures currently include 64 social self-funded buildings where their remediation status is unknown as registered providers are yet to provide remediation dates. We expect buildings with unknown remediation status to be confirmed in coming months as further data is collected through engagement with Homes England.

Overall remediation: key statistics

Of the 4,411 residential buildings 11 metres and over in height with unsafe cladding the department is monitoring, as of 31 May 2026:

• 1,672 buildings (38%) have completed remediation, including those awaiting building control sign off

• 659 buildings (15%) have started remediation

• 2,080 buildings (47%) have not started remediation

Since the end of April 2026:

The department is monitoring the remediation progress of 33 more buildings.

84 fewer buildings are known to have started or completed cladding remediation. This reduction is driven by improved reporting of the remediation status of cladding works for Developer buildings that have both cladding and non-cladding defects. Developers must now report progress separately for cladding and non-cladding defects, whereas previously an overall building-level status was reported.

The decrease of 84 is a result of:

• 60 more buildings being reported to have started or completed cladding remediation in the latest time period when they previously were not reported to have started or completed cladding remediation or weren’t reported to have cladding defects.

• 144 fewer buildings reported as having started or completed remediation than previously. These are now reported to have not started cladding remediation or to not have cladding defects. The majority of these changes in status are due to developers reclassifying the works status of their buildings given the reporting changes mentioned above. For example, buildings which have not started cladding works but had started remediation on non-cladding defects may previously have had a works status of remediation underway, but now have a cladding works status of remediation not started.

128 more buildings are known to have completed cladding remediation. This is due to:

• 33 more buildings outside of the developer remediation contract being reported to have completed remediation.

• 104 more buildings under the developer remediation contract being reported to have completed cladding remediation when they previously were reported to have works underway or not started or weren’t reported to have cladding defects. Some of the changes in status will be due to buildings completing cladding remediation on site in the latest reporting period, and some will be due to developers reclassifying the works status of their buildings given the reporting changes mentioned above. For example, buildings which have completed cladding works but had not completed remediation on non-cladding defects may previously have had a works status of remediation underway, but now have a cladding works status of remediation complete.

• Nine fewer buildings reported to have completed cladding remediation than previously. These are now reported to have not completed cladding remediation or to not have cladding defects.

There are an estimated 237,000 dwellings in the occupied private and social sector 11m+ residential buildings with unsafe cladding that the department are monitoring. Of these an estimated 102,000 dwellings are in buildings that have completed remediation, and an estimated 34,000 additional dwellings are in buildings that have started remediation. An estimated 101,000 dwellings are in buildings that have not started remediation.

Figure 4: Progress of remediating unsafe cladding differs across the programmes and monitoring routes due to the differing maturity of the programmes.

Overall remediation by height

Figure 5: 60% of the 18m+ buildings the department is monitoring the remediation progress of have started or completed remediation on unsafe cladding, compared to 44% of 11-18m buildings.

Overall remediation by tenure

Figure 6: 54% 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

Table 6: Local authorities with the highest number of buildings that the department is monitoring the cladding remediation of, 31 May 2026.

Local Authority	Buildings monitored	In programme Percentage(%)	Remediation Underway Percentage(%)	Completed Remediation  Percentage(%)
Tower Hamlets	Over 400	46%	18%	35%
Manchester	201-400	41%	14%	45%
Newham	101-200	41%	17%	42%
Islington	101-200	49%	28%	24%
Wandsworth	101-200	47%	10%	43%
Hackney	101-200	40%	13%	48%
Greenwich	101-200	36%	26%	38%
Bristol, City of	101-200	60%	11%	30%
Southampton	101-200	20%	2%	78%
Southwark	101-200	63%	10%	27%

This table only shows local authorities with over 100 buildings the department is monitoring the cladding remediation of. An interactive map showing remediation progress for all local authorities with over 10 buildings monitored with unsafe cladding can be found in the Maps section of the accompanying dashboard.

ACM remediation

Information in this section is correct as at 31 May 2026 and shows a monthly update from the previous publication.

Figure 7: 97% of the 516 identified ACM clad high-rise buildings have started or completed remediation, with 95% having had their ACM cladding removed and 91% having completed remediation, including those awaiting building control sign-off.

Table 7: Remediation status of buildings with ACM cladding systems unlikely to meet Building Regulations, 31 May 2026

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Completed Remediation	458	89%	458	89%
Remediation complete awaiting building control signoff	14	3%	472	91%
Remediation started - cladding removed	17	3%	489	95%
Remediation started	11	2%	500	97%
Remediation plans in place	8	2%	508	98%
Intent to remediate	4	1%	512	99%
Remediation plan unclear	4	1%	516	100%
Total	516	100%	516	100%

ACM Remediation: key statistics

As of 31 May 2026, the department has identified 516 high-rise residential and publicly owned buildings identified with ACM cladding systems unlikely to meet Building Regulations, no change since the end of April.

• 472 buildings (91% of all buildings) have completed ACM remediation – an increase of five since the end of April. Of these, 458 buildings (89% of all buildings) have received building control sign off – no change since the end of April

• 500 buildings (97% of all buildings) have started or completed ACM remediation – no change since the end of April. Of these, 489 buildings (95% of all buildings) have removed ACM cladding – an increase of one since the end of April

There are an estimated 29,800-33,100 dwellings in private and social sector buildings that have completed remediation, and a further 2,700-2,900 dwellings in occupied private and social sector buildings that have yet to be remediated.

Driving ACM remediation forward

There are 16 buildings yet to start ACM remediation (3% of all buildings) - no change since the end of April. Two buildings are vacant so do not pose a risk to resident safety.

Table 8: Enforcement action and forecast start dates for occupied high-rise buildings yet to start ACM remediation, 31 May 2026

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 2026
Total	7	3	11	0

Of the 14 high-rise occupied buildings yet to start ACM remediation:

• Seven buildings are forecast to start works by the end of December 2026, and three of these have had local authority enforcement action taken against them

• An additional four buildings are forecast to start works by the end of 2027, and two of these have had local authority enforcement action taken against them

• Two buildings without a forecast start date have had local authority enforcement action taken against them

• The remaining building has been determined as in scope of the ACM monitoring programme in 2026, and 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: 97% of buildings are forecast to have started or completed ACM remediation works by the end of June 2026.

ACM remediation progress by year of identification

Figure 9: 98% of buildings identified at 31 December 2024 have started or completed remediation compared to 97% of all buildings in the programme.

Since 31 December 2021, 35 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, 10 buildings were identified in 2024, eight buildings were identified in 2025 and three buildings were identified in 2026.

Table 9: Buildings with unsafe ACM cladding by year of identification, 31 May 2026

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	10	505
2025	8	513
2026	3	516
Total	516	516

ACM remediation by sector

Figure 10: 99% of the 165 social sector residential buildings in the ACM programme have started or completed remediation, compared to 95% of the 249 private sector residential buildings.

Building Safety Fund

Information in this section is correct as at 31 May 2026 and shows a monthly update from the previous publication.

Figure 11: 87% of buildings proceeding with an application for funding in the BSF have started or completed remediation, with 75% having completed remediation, including those awaiting building control sign-off.

Table 10: Remediation status of buildings within the Building Safety Fund, 31 May 2026

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	378	59%	378	59%
Remediation complete: awaiting building control sign-off	103	16%	481	75%
Remediation started	76	12%	557	87%
Remediation plans in place	72	11%	629	98%
Intent to remediate	11	2%	640	100%
Total	640	100%	640	100%

BSF remediation: key statistics

As at 31 May 2026, 640 buildings were assessed as eligible and are proceeding with an application for funding from the Building Safety Fund. The remaining 3,071 buildings registered with the fund are either ineligible (1,118), withdrawn (1,633), have transferred to the Cladding Safety Scheme (307), or have been retained by the Cladding Safety Scheme (13).

Of the 3,071 buildings that registered with the Building Safety Fund and are not currently proceeding with an application for funding, 461 buildings which were assessed as eligible have been transferred to developers.

As at 31 May 2026, 307 buildings have been transferred to the Cladding Safety Scheme for their remediation and are progressing through the CSS fund, an increase of 38 buildings since reported at the end of April. Of these, 303 buildings had not started remediation works before transferring to the CSS.

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. Three buildings have also withdrawn from the CSS since transferring from the BSF.

Of the 640 buildings proceeding with an application for funding in the Building Safety Fund:

• 150 buildings (23%) are remaining in the fund with developers set to reimburse the cost of remediation

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

Of the 640 buildings proceeding with an application for funding, 98 buildings have been assessed with a Fire Risk Appraisal for External Walls (FRAEW), and 542 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 2026 one building had undertaken remediation work from both application periods, so is double counted. Further details are available in the Technical Note.

Of the 640 buildings proceeding with an application for funding, 557 buildings (87%) have either started or completed remediation works – no change since the end of April.

Of the 557 buildings that have started or completed remediation as at 31 May 2026:

• 76 buildings (12% of all buildings) have started remediation

• 481 buildings (75% of all buildings) have completed remediation – an increase of 11 since the end of April. Of these, 378 buildings (59% of all buildings) have received building control sign off

There are 83 eligible buildings proceeding with an application for funding that have not started remediation, of which:

• 72 (11% of all buildings) have remediation plans in place

• 11 (2% of all buildings) have reported an intent to remediate

There are an estimated 53,000 dwellings in buildings that are eligible and proceeding with an application for funding in the BSF.

BSF remediation progress over time

Figure 12: There has been an increase of 13 BSF buildings that have started or completed remediation since the end of May 2025

Since the end of May 2025:

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

• 13 more eligible buildings have started or completed remediation

• 70 more eligible buildings have completed remediation

BSF remediation by tenure

Figure 13: 97% of social sector buildings in the BSF, including buildings with a financial viability claim, have started or completed remediation compared to 85% of private sector buildings.

Cladding Safety Scheme

Information in this section is correct as at 31 May 2026 and shows a monthly update from the previous publication.

Figure 14: There are 3,504 buildings at different stages of the Cladding Safety Scheme, including 1,234 buildings with live applications and 1,325 eligible buildings, of which 367 buildings have started or completed works, with 112 having completed works.

Table 11: Remediation status for buildings within the Cladding Safety Scheme, 31 May 2026

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	112	8%	112	8%
Works started	255	19%	367	28%
In programme	958	72%	1325	100%
Total	1325	100%	1325	100%

Cladding Safety Scheme: Key statistics

As at the end of May 2026, there were 3,504 buildings in the different stages of the Cladding Safety Scheme (1,325 eligible buildings and 2,179 pre-eligible buildings). Of the 2,179 pre-eligible buildings:

• 945 buildings are in the pre-application stage

• 1,234 buildings have a live application and are progressing through the eligibility stages

There are 1,325 eligible buildings as at the end of May 2026, an increase of 86 since the end of April. 26 of the newly eligible buildings this month have been transferred from the BSF. In total, 270 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. Three buildings have also withdrawn from the CSS since transferring from the BSF.

Of the 1,325 eligible buildings:

• 1,212 buildings (91% of eligible buildings) have signed Grant Funding Agreements (GFA) - an increase of 30 since the end of April

• Of these, 1,089 buildings (82% of all eligible buildings) have received a pre-tender support payment – an increase of 59 since the end of April

• 367 buildings (28% of all eligible buildings) have started or completed remediation works on site – an increase of four since the end of April

• Of these, 112 buildings (8% of all eligible buildings) have completed remediation works on site, including those awaiting building control sign-off – an increase of 12 since the end of April

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

Height breakdown

Figure 15: 36% of eligible 11-18m buildings in the CSS have started or completed remediation, compared to 14% of eligible 18m+ buildings.

Tenure breakdown

Figure 16: 22% of eligible social sector buildings in the CSS have started or completed remediation, compared to 33% of eligible private sector buildings.

Social housing funding eligibility criteria changed in June 2025, allowing more social housing buildings to access government funding from the CSS. Therefore, we expect more eligible social buildings will appear on the social bar of this graph over time. As of the end of 31 May 2026, of the pre-eligible live applications to the CSS, 83% of the applications are social, 15% are private, and for 2% their tenure is currently unknown.

Developer-led remediation

Information in this section received by developers is correct as at 30 April 2026.

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’ and ‘Cladding Safety Scheme’.

From April 2026, developers must now report progress separately for cladding and non-cladding defects, whereas previously an overall building-level status was reported. Where a building has both cladding and non-cladding defects, an overall building works status is derived and used in the ‘Developer remediation: key statistics’ and ‘Self-reported and developer-led remediation’ sections below. Where a building has both cladding and non-cladding defects:

• If both defects have completed work, the overall building status is reported as complete

• If both defects have not started work, the overall building status is reported as not started

• Otherwise, the overall building status is reported as started, as at least one defect has started works.

From April 2026 developers must also report actual or estimated start and completion dates for both cladding and non-cladding defects separately. Where a building has both cladding and non-cladding defects, the earliest start date (actual or estimated) and latest completion date (actual or estimated) is reported across the cladding and non-cladding dates. This shows when works first started (or will start) on a building, and when all works are completed (or will complete).

Figure 17: 49% of buildings in the developer remediation contract have either started or completed remediation works on life-critical fire safety risks, with 23% having completed remediation works, including those awaiting building control sign-off.

Table 12: Remediation status of buildings requiring works under the developer remediation contract, 31 May 2026. Percentages may not sum to 100% due to rounding.

Remediation Stage	Number of buildings	Percentage	Cumulative Number	Cumulative Percentage
Remediation complete	487	19%	487	19%
Remediation complete – awaiting building control sign-off	109	4%	596	23%
Remediation started	668	26%	1264	49%
Remediation not started – plans in place	383	15%	1647	63%
Remediation not started – no plans in place	957	37%	2604	100%
Total	2604	100%	2604	100%

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), Cladding Safety Scheme (CSS) and ACM programme data. A building is identified with life-critical fire safety defects if at least one of the following is true:

• 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, Cladding Safety Scheme (CSS) or is being monitored under the ACM programme (including buildings developers have agreed to reimburse 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.

From February 2026, if a developer’s buildings will be monitored solely via government remediation schemes, we use the developer’s most recent data return held by MHCLG to report the number of buildings for which the developer is responsible under the Developer Remediation Contract, and we use relevant data from the government scheme(s) to impute whether a building requires works, the defect type, remediation status and cost of works.

As at 31 May 2026, 53 developers have signed the developer remediation contract. There are 4,738 buildings covered by the developer remediation contract. Of these, 2,604 have been identified as having life-critical fire safety defects that developers are obligated to remediate or pay to remediate – an increase of 51 since the April data release.

Of the 2,604 buildings identified as having life-critical fire safety risks:

• 596 (23%) are reported to have completed remediation – an increase of 75 since the April data release. Of the 596 buildings that are reported to have completed remediation, 487 buildings (19% of all buildings with defects) are reported to have received building control sign-off

• 1,264 (49%) are reported to have started or completed remediation – an increase of 83 since the April data release

• 383 (15%) are reported to have not started remediation but have plans in place – an increase of 54 since the April data release

• 957 buildings (37%) have not started and have no plans in place - a decrease of 86 since the April data release

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 2,604 buildings identified as requiring remediation have an estimated cost of remediation of around £4.2 billion. This is an increase of £0.1bn since reported in the April data release. 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. The increase is due to more buildings being identified with life critical fire safety defects, and a small increase in the average costs reported by developers.

There are an estimated 167,000 dwellings in buildings with defects that developers are committed to remediate. Of these, there are an estimated 89,000 dwellings in buildings that are reported as having either started or completed remediation works.

Based on start and completion dates reported by developers, 701 buildings which have not yet started are reportedly expected to start works between 1 May 2026 and 30 April 2027, and 289 buildings which have not yet completed are reportedly expected to complete their remediation between 1 May 2026 and 30 April 2027.

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

• 71 (16%) have completed remediation - an increase of five since the April data release. Of these 71, 48 buildings (11% of all buildings) are reported to have received building control sign-off

• 224 (50%) have started or completed remediation – an increase of 12 since the April data release

• 89 (20%) are reported to have not started remediation but have plans in place – a decrease of six since the April data release

• 83 (18%) are reported to have not started remediation and have no plans in place – a decrease of two since the April data release

• 55 (12%) have not been identified by developers as having life-critical fire-safety defects – a decrease of four since the April data release

The 451 buildings in the developer remediation contract differs from the 461 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: 53% of the 18m+ buildings have started or completed remediation, compared to 45% 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), ACM and CSS 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 1,815 buildings which developers have reported as having unsafe cladding – a decrease of six since the April data release. Three buildings no longer fall under the developer remediation contract and 46 buildings are no longer reported with cladding defects. Two new buildings were added under the developer remediation contract and 41 buildings have been identified to require cladding remediation. Of these 1,815:

• 566 (31%) are reported to have completed remediation– an increase of 133 since the April data release. This change is driven by improved reporting requirements for Developer buildings with both cladding and non-cladding defects. Developers must now report progress separately for each defect type, whereas previously an overall building-level status was reported. The increase in cladding completions is due to the status of some buildings where the cladding work had completed but the non-cladding works had not, now being reported as “completed” instead of “started” or “not started”

• Of the 566 buildings that are reported to have completed remediation, 434 buildings (24% of all buildings with defects) are reported to have received building control sign-off.

• 862 (47%) are reported to have started or completed remediation – a decrease of 97 since the April data release. This change is driven by improved reporting requirements for Developer buildings with both cladding and non-cladding defects. Developers must now report progress separately for each defect type, whereas previously an overall building-level status was reported. The decrease in cladding starts is due to the status of some buildings where the non-cladding work had started or completed but the cladding works had not started, now being reported as “not started” instead of “started” or “completed”. 387 (21%) are reported to have not started remediation but have plans in place – an increase of 113 since the April data release

• 566 (31%) are reported to have not started remediation but have plans in place – a decrease of 22 since the April data release

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 and developer-led remediation

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. Furthermore, this section reports 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 2,456 buildings require life-critical fire safety remediation, which will be directly remediated by the developer, an increase of 53 since the April data release.

Buildings that are being remediated in the BSF, ACM or CSS 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 2,456 buildings being directly remediated by the developer:

• 511 buildings (21%) have completed remediation, an increase of 72 since the April data release. Of these, 417 buildings (17% of all buildings with defects) are reported to have received building control sign-off

• 1,145 buildings (47%) have started or completed remediation, an increase of 85 since the April data release

• 383 buildings (16%) have not started remediation but have a plan in place, an increase of 55 since the April data release

• 928 buildings (38%) have not started and have no plans in place, a decrease of 87 since the April data release

Further information on the progress developers have made regarding the buildings they’ve reported on is available in the accompanying management information tables and quarterly Developer remediation contract data release. From August 2025 these include an update against the commitments set out in the joint plan to accelerate developer-led remediation and improve resident experience, which was published alongside the department Remediation Acceleration Plan (RAP).

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 self-funded remediation

Data quality

Homes England are continuing to work with registered providers to review records of their 11m+ buildings which have or had unsafe cladding to the NRS. While this work is underway, fluctuations in the remediation progress figures for social buildings where registered providers are self-funding cladding remediation is expected. Once this work is complete, we expect to be able to provide more accurate and frequent information on social housing remediation progress. Further information on the data collection of social self-funded buildings is available in the Technical Note.

Social Housing remediation: Key statistics

Figure 19: 68% of social self-funded buildings reported to have unsafe cladding have started or completed remediation works, with 59% (of identified buildings) having completed remediation works.

Table 13: Remediation status of social self-funded buildings with unsafe cladding, 31 May 2026.

Remediation Stage	Number	Percentage	Cumulative Number	Cumulative Percentage
Remediation completed	332	59%	332	59%
Works started	55	10%	387	68%
Works not started	115	20%	502	89%
Remediation progress currently unknown	64	11%	566	100%
Total	566	100%	566	100%

As at 31 May 2026, there are 566 11m+ social buildings identified with unsafe cladding which registered providers are self-funding the remediation of, a decrease of four since the end of April 2026. Two buildings have applied to the CSS so are no longer reported as social self-funded, and two buildings were removed due to continued data cleansing by registered providers. This includes social buildings that registered providers reported to be self-funding the cladding remediation of in the NRS, that were not identified in another remediation programme, and 19 social buildings monitored in the ACM programme where registered providers have self-funded ACM remediation.

Of these 566 11m+ social buildings where registered providers are self-funding remediation:

• 332 (59%) are reported to have completed remediation – an increase of six since the end of April 2026

• 387 (68%) are reported to have started or completed remediation – an increase of three since the end of April 2026

• 115 (20%) are reported to have not started remediation – a decrease of six since the end of April 2026

• The remediation status of 64 (11%) buildings is currently unknown as registered providers are yet to provide remediation dates on the NRS – a decrease of one since the end of April. We expect buildings with unknown remediation status to be confirmed in coming months as further data is collected

Height breakdown

Figure 20: 72% of the 11-18m social self-funded buildings are reported to have started or completed remediation compared to 63% of the 18m+ social self-funded buildings.

Enforcement

Information in this section is correct as at 22 May 2026 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 22 May 2026, enforcement action has been, or is being, taken under the Housing Act against 898 buildings reported as over 11m with suspected unsafe cladding - an increase of 18 since the end of April. Some of these buildings will have been found to be safe, and others may not have unsafe cladding but other building safety defects. The department has monitored or is currently monitoring the cladding remediation progress of 47% of these 898 buildings, including those which have completed remediation.

187 of the 898 buildings where enforcement action has been, or is being taken, have had 190 inspections with Joint Inspection Team support – no change in inspections since the end of April.

Of the 898 buildings where a local authority had undertaken an inspection, we are aware of the following HHSRS ratings in relation to fire hazards only:

• 147 had a Category 1 rating

• 660 had a Category 2 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 898 buildings, we are aware that at least 268 improvement notices, 115 hazard awareness notices and one prohibition order have been served to date. Some buildings may have received multiple notices. We understand that 64 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 estimated number of residential buildings 11 metres and over with unsafe cladding and the estimated cost to remediate them

• 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 social housing buildings reported by registered providers as being self-funded

• the progress of the Waking Watch Relief Fund and Waking Watch Replacement Fund

• 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. The estimate of the prevalence of external wall system fire risk in mid-rise buildings, previously updated in July 2025, has been updated on 27th May 2026. This does not include an update of the estimated cost, which is unchanged since the last update in July 2025 and estimated as of March 2025.

EWS1 requirements on residential buildings in England

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. On 17 July 2025, MHCLG published an updated estimate of the number of 11-18m residential buildings in England.

RSH publication

On 18 December 2025, the Regulator of Social Housing published findings from the Fire Safety Remediation Survey (FRS) collected from Registered Providers of Social Housing for buildings 11 metres and over in height as at 30 September 2025.

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 19 December 2025, MHCLG published data on cladding remediation unit costs, providing data on costs per square metre of cladding remediated for high-rise and mid-rise non-ACM buildings, including analysis by cladding area and cost categories.

Technical note

Please see the accompanying technical notes document for further details.