Air conditioning has traditionally been associated with offices, hotels and homes in warmer countries. In London, however, that could be starting to change.
Hotter summers, repeated heatwaves and concerns about overheating are changing the way Londoners think about their homes. Features that once seemed like luxuries, including air conditioning, external shading and improved ventilation, are increasingly becoming part of the conversation around comfort, energy efficiency and property desirability.
So, could air conditioning in London homes eventually become a must-have feature for buyers and tenants?
London Homes Are Facing Hotter Summers
The evidence points towards a clear long-term change in UK summer temperatures.
The Met Office reports that the UK’s warmest summers are increasingly concentrated in recent decades. The five warmest UK summers recorded up to 2025 had all occurred since 2003, with 2025 becoming the warmest on record at the time.
Summer 2026 has continued that trend. By mid-August, the UK had already experienced repeated periods of exceptional heat, including significant heatwaves where temperatures reached or exceeded 38°C.
For London property owners, this matters because many homes were designed primarily around retaining heat during colder months rather than staying cool during prolonged periods of high summer temperatures.
Overheating Is Becoming a London Property Issue
Overheating is no longer simply about feeling uncomfortable for a few days each summer.
London City Hall’s Heat Ready London work estimates that around one million London homes may currently be at high risk of overheating.
The type of property also makes a significant difference. Top-floor flats, homes with large south or west-facing windows, heavily glazed modern apartments and properties with limited cross-ventilation can become particularly uncomfortable during prolonged hot weather.
Dense urban areas can also experience the urban heat island effect, where buildings, roads and other surfaces retain heat and make central areas warmer than surrounding locations.
For landlords and homeowners across areas such as Whitechapel, Stepney Green, Mile End, Bethnal Green and wider East London, summer temperature management may therefore become a more important part of maintaining and improving a property.
Could Air Conditioning Increase Property Appeal?
There is not yet enough evidence to say that installing air conditioning will automatically increase a London property’s value.
However, it could influence how attractive a property feels to prospective buyers or tenants.
A well-installed cooling system may be particularly appealing in:
- Modern flats with significant glazing
- Top-floor apartments
- South-facing properties
- Loft conversions
- Bedrooms that become particularly warm overnight
- Home offices
- Higher-spec rental properties
- Properties where natural ventilation is limited
As expectations change, buyers and tenants may increasingly consider summer comfort alongside traditional priorities such as heating, insulation, storage and energy efficiency.
In some parts of the market, effective cooling could therefore develop into another feature that helps one property stand out against competing homes.
Air Conditioning Is Not the Only Solution
Installing air conditioning should not necessarily be the first response to an overheating property.
London’s planning approach prioritises reducing heat through the design of the building before relying on mechanical cooling. Measures can include better ventilation, external shading, solar-control glazing and limiting excessive solar heat gain.
The Energy Saving Trust recommends practical measures such as closing curtains or blinds when direct sunlight is entering a room, opening windows when outdoor temperatures are lower and improving insulation. It also notes that solar-control window film can help reduce heat entering through glazing.
For some homes, these measures may be sufficient. For others, particularly properties that consistently overheat, mechanical cooling may become a more practical option.
What Does Air Conditioning Cost to Run?
Running costs are another consideration.
According to the Energy Saving Trust’s June 2026 estimates, a portable air-conditioning unit typically costs around £4.62 to £5 for 24 hours of continuous use in Great Britain, compared with approximately 14p to 30p for a conventional fan.
Portable units can therefore provide effective cooling, but they consume considerably more electricity than fans.
A permanently installed modern system may operate differently and its actual running cost will depend on factors including:
- The system’s efficiency
- The size of the property
- Insulation
- Desired indoor temperature
- Number of rooms being cooled
- Electricity tariff
- How frequently the system is used
Property owners should therefore consider both installation costs and ongoing energy consumption before choosing a system.
Air-to-Air Heat Pumps Could Change the Market
An interesting development in 2026 is the growing role of air-to-air heat pumps.
These systems can heat a home during winter while certain models can also provide cooling during summer. The Energy Saving Trust suggests they may become increasingly common as UK summers become hotter.
The Government has also expanded the Boiler Upgrade Scheme to include grants towards eligible air-to-air heat pumps.
Eligible property owners in England and Wales can currently receive £2,500 towards the cost and installation of an air-to-air heat pump. The scheme can also apply to owners of properties that are rented to tenants, provided the relevant eligibility conditions are met.
This could make combined heating and cooling systems considerably more attractive to some homeowners and landlords.
Do You Need Planning Permission for Air Conditioning?
Property owners should check before installing external equipment.
There is no blanket ban on domestic air conditioning in England. Government guidance confirms that air conditioning can be installed in both existing and new homes. Whether planning permission is required depends on the property, installation and impact on the building.
Additional restrictions may apply to listed buildings, conservation areas, flats or properties subject to leasehold conditions.
Landlords should also consider whether freeholder or managing-agent consent is required before installing equipment on an external wall.
Before carrying out work, it is sensible to confirm the position with the relevant local planning authority and a qualified installer.
New Homes Are Already Being Designed Around Overheating
The direction of building regulation provides another indication of how important summer temperatures are becoming.
Approved Document O of the Building Regulations sets standards for reducing overheating in new residential buildings in England.
This does not mean every new property requires air conditioning. In fact, the emphasis remains on designing buildings to prevent excessive heat accumulation wherever possible.
However, the existence of dedicated overheating regulations demonstrates that cooling is becoming an increasingly significant part of residential design.
What Should London Landlords Consider?
Landlords do not need to rush out and install air conditioning in every rental property.
The decision should depend on the individual property.
First, consider whether the property genuinely suffers from overheating. A top-floor flat with extensive glazing may have a completely different requirement from a traditional ground-floor Victorian conversion.
Landlords should also consider running costs, installation costs, maintenance, planning restrictions and responsibility for operating the system.
Where overheating is a recurring issue, improvements such as shading, insulation, ventilation or solar-control measures may provide a more proportionate solution.
However, for certain properties, particularly higher-value rentals or homes that become consistently uncomfortable during heatwaves, efficient cooling could become an increasingly valuable feature.
Is Air Conditioning the Next London Property Must-Have?
Probably not for every London home, at least not yet.
However, the direction of travel is becoming clearer.
London is experiencing increasingly serious overheating risks, summers are becoming warmer and both government policy and building regulations are paying greater attention to keeping homes comfortable during periods of extreme heat.
Air conditioning may therefore move gradually from being viewed as a luxury towards becoming a practical property feature, particularly in homes that are vulnerable to overheating.
For landlords, the important point is not simply whether a property has air conditioning. It is whether the property remains comfortable, efficient and attractive to tenants throughout the year.
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Frequently Asked Questions
Is air conditioning common in London homes?
It remains considerably less common in British homes than in many warmer countries, but interest is increasing as London experiences hotter summers and more frequent overheating.
Does air conditioning add value to a London property?
There is no guaranteed increase in property value. However, effective cooling may improve the appeal of particular properties, especially top-floor flats, modern apartments and homes that regularly overheat.
Can landlords install air conditioning in rental properties?
Potentially, yes. Landlords should first check planning requirements, lease or freeholder restrictions, installation standards and ongoing maintenance responsibilities.
Can I get a grant towards air conditioning?
Eligible property owners in England and Wales can currently receive a £2,500 Boiler Upgrade Scheme grant towards qualifying air-to-air heat pump systems, which can provide heating and cooling.
