For decades, the conversation around housing in the UK has centred on one primary challenge: keeping people warm.

From tackling fuel poverty and improving insulation to delivering retrofit programmes and reducing carbon emissions, housing associations and local authorities have invested heavily in making homes more energy efficient.

Yet as the UK climate changes, another question is becoming increasingly important.

What happens when homes designed to retain heat also need to cope with more frequent and more intense periods of hot weather?

For asset managers, retrofit teams, building safety professionals and housing leaders across the social housing sector, this is no longer a distant issue. It is becoming part of long-term asset planning, resident safety and climate resilience.

The UK’s housing stock was designed for a different climate.

Historically, Britain’s housing stock has been built with one priority in mind. Keeping heat inside.

That made sense. The UK has traditionally experienced relatively mild summers and colder winters, so policy, regulation and investment have focused heavily on improving insulation, reducing heat loss, enhancing energy efficiency, tackling damp and mould, lowering heating costs and reducing carbon emissions.

Programmes such as the Social Housing Decarbonisation Fund and wider retrofit initiatives have accelerated this work.

However, there is a risk that homes designed primarily to retain heat in winter can struggle during prolonged periods of hot weather if ventilation, shading and overheating risks are not properly considered.

That does not mean insulation is the problem. Energy efficiency remains essential. But retrofit strategies increasingly need to consider year-round comfort and safety, not just winter warmth.

Is the UK climate actually changing?

The answer is yes. Long-term climate data shows that the UK has warmed significantly over recent decades.

In July 2022, the UK recorded temperatures above 40°C for the first time, with 40.3°C confirmed at Coningsby, Lincolnshire. That event marked a major moment in UK climate records.

More recently, spring 2026 was exceptionally warm. According to provisional Met Office statistics, spring 2026 was the warmest spring on record for England and Wales, and the third warmest spring on record for the UK as a whole. 

Right now June 2026 has seen significant heat, with forecasts suggesting the potential for record-breaking June temperatures. 

The more important point for housing providers is the long-term trend. UK Climate Projections indicate a greater chance of warmer, wetter winters and hotter, drier summers over the 21st century, although individual years will continue to vary.

What could the UK climate do over the next 2–10 years?

Climate projections are more reliable over decades than over individual years, so it would be misleading to claim exactly what will happen in the next two to five years.

However, the direction of travel is clear.

The UK is expected to continue warming. Heatwaves are expected to become more frequent and more intense. Summers are projected to become hotter on average, while extreme heat events that were once rare are becoming more likely.

Over the next five to ten years, housing providers should expect overheating to become a more significant operational and resident safety concern, particularly during heatwaves and in properties that are already vulnerable to high indoor temperatures.

The Climate Change Committee has warned that the UK’s preparations for climate change remain inadequate, and that risks will continue to grow even if global efforts to limit warming are successful.

Why extreme heat matters for social housing.

Unlike some countries where air conditioning is common, most UK homes have been designed without active cooling systems.

Many residents rely on simple measures such as opening windows, using fans, closing curtains and staying hydrated. During extreme heat, these measures may not always be enough.

The risks are particularly significant for vulnerable residents, including older people, young children, people with respiratory or cardiovascular conditions, disabled residents and those with limited mobility.

Some property types may also be more exposed. Flats, top-floor homes, high-rise blocks and homes with limited ventilation can be more vulnerable to overheating, especially where solar gain and poor night-time cooling are issues.

The English Housing Survey reported that in 2023–24, 2.9 million households in England said their home became uncomfortably hot. That shows overheating is already being experienced by residents, not just predicted as a future issue.

Could overheating become the new damp and mould?

That may sound like a bold statement, but it is worth considering.

Damp and mould have rightly become a major focus across the housing sector, particularly because of their impact on health, safety and resident wellbeing.

As extreme heat becomes more common, overheating may begin to attract similar attention.

Housing providers may increasingly need to ask:

• Are some homes becoming dangerously hot during heatwaves?
• Which property types are most affected?
• Which residents are most vulnerable?
• What practical measures can reduce overheating risk?
• Should overheating form part of stock condition surveys, retrofit planning and long-term asset strategies?

These are no longer theoretical questions. Research commissioned by the Climate Change Committee has found that many existing UK homes are exposed to summertime overheating risk, and that significant retrofit work would be required to reduce risk under future warming scenarios.

What could this mean for retrofit programmes?

Current retrofit programmes often focus on external wall insulation, loft insulation, improved glazing, airtightness, heat pumps and wider decarbonisation measures.

These remain essential. But future retrofit strategies may need to balance energy efficiency with summer thermal comfort.

Potential interventions could include improved ventilation, external shading, shutters, canopies, reflective roofing materials, green infrastructure, better window design and formal overheating assessments.

The goal is not to reverse energy efficiency improvements. It is to ensure that homes remain safe, healthy and comfortable across the whole year.

How might future social housing design change?

The UK’s need for more homes creates an opportunity to design climate resilience into future developments from the beginning.

Future social housing design may increasingly include enhanced natural ventilation, better building orientation, reduced solar gain, green roofs, tree planting, sustainable urban cooling measures, improved shading and passive cooling techniques.

Many of these approaches are already used internationally. The challenge is applying them effectively to UK housing, planning, funding and regulatory contexts.

Research from the University of Manchester has warned that UK social homes are at growing risk from rising temperatures and that housing policy has not yet kept pace with the need for climate-resilient homes. The study highlights the need to prioritise cooling, ventilation and overheating prevention alongside heating efficiency.

The asset management challenge.

For heads of asset management, climate resilience is becoming a strategic issue. Housing providers already consider Decent Homes compliance, building safety, net zero targets, planned maintenance, stock condition data and resident vulnerability.

Overheating risk may increasingly need to sit alongside those priorities.

Boards and executive teams may need to ask:

• Which homes are most vulnerable to overheating?
• How should this influence future investment programmes?
• What data do we currently hold on internal temperatures, ventilation and resident vulnerability?
• How should retrofit standards change?
• What risks could emerge over the next 20 years?

These are long-term strategic questions that could shape investment decisions for decades.

The skills challenge facing the sector.

As housing priorities evolve, so too will workforce requirements.

The social housing sector has already experienced growing demand for specialists in building safety, fire safety, compliance, asset management, retrofit delivery and damp and mould remediation.

If climate resilience becomes a larger focus, demand could grow for professionals with expertise in retrofit design, building performance, sustainability, environmental engineering, climate adaptation, ventilation, stock condition data and asset strategy.

Housing associations and local authorities may find themselves competing for increasingly specialised talent.

Recruitment strategies will need to evolve alongside the sector itself.

So, what do we need to think about now?

The social housing sector has spent years tackling some of the UK’s most pressing housing challenges.

From improving energy efficiency to addressing damp and mould, significant progress has been made in creating warmer, healthier homes.

But climate change means the sector may now need to broaden its focus.

The challenge is no longer simply keeping residents warm. It is increasingly about keeping residents safe and comfortable during hotter summers too.

Extreme heat presents new questions for housing providers, asset managers, building safety teams and policymakers.

How should homes be retrofitted?

How should future developments be designed?

How can vulnerable residents be protected?

And are today’s housing strategies preparing homes for tomorrow’s climate?

The answers may shape the future of social housing for decades to come.\

The housing sector is evolving, and the demand for specialist skills is only set to increase. If you're planning for the future and need support finding the right talent, we'd love to hear from you.

FAQs

Are UK summers becoming hotter?

Yes. Long-term climate data shows that the UK is warming, and UK climate projections indicate a greater chance of hotter, drier summers in future. However, individual summers will still vary.

Was May 2026 the hottest May on record?

No. According to provisional Met Office statistics, May 2026 was the joint third warmest May on record for the UK. England recorded its second warmest May, and spring 2026 was the warmest spring on record for England and Wales.

Was June 2026 the hottest June on record?

That cannot yet be stated. As of 23 June 2026, the month is still ongoing. Forecasts suggest the potential for record-breaking June heat, but the official monthly ranking can only be confirmed after the month ends and data is verified.

Why can highly insulated homes become too hot?

Insulation helps reduce heat loss in winter, but if a home has poor ventilation, high solar gain or limited night-time cooling, heat can build up during prolonged hot weather. Good retrofit design needs to consider both winter warmth and summer overheating risk.

Why is overheating a concern in social housing?

Overheating can affect health, comfort and wellbeing, particularly for older people, young children, residents with health conditions and people living in flats or homes with limited ventilation.

Will retrofit programmes need to change?

Likely, yes. Retrofit programmes will still need to improve energy efficiency, but they may also need to consider ventilation, shading, passive cooling and overheating assessments.

Could future social housing be designed differently?

Yes. Future homes may increasingly need to include passive cooling, better ventilation, reduced solar gain, green infrastructure and climate-resilient design principles from the outset.