Air conditioning in London homes has historically been rare, but that is beginning to change. London has always been known for its period architecture, garden squares, lateral apartments, Victorian family houses and elegant townhouses — but historically, it has not been a city built around air conditioning.
Following another period of extreme summer heat, and with June temperature records being challenged and broken across the UK, comfort cooling is now becoming a far more important consideration for London home buyers and tenants.
At Ridgestone Property, we work with many clients relocating to London from overseas, often from warmer countries in Europe, the Middle East and the United States. For these clients, air conditioning is not seen as an unusual luxury — it is often a standard expectation.
This is particularly true for American clients, where air conditioning is part of everyday residential life. We also see this with clients relocating from cities such as Madrid, Milan, Dubai, Singapore and Miami, where warm-weather living and indoor temperature control are simply part of how people assess a home.
Increasingly, one of the first questions we are asked is:
“Does the property have air conditioning?”
And if the answer is no, the next question is usually:
“Can it be installed?”
The answer is not always straightforward.
Why air conditioning in London homes matters more than it used to
For many years, London buyers and tenants prioritised natural light, outside space, proximity to schools, transport links, lateral living, storage, parking and overall condition.
Those factors remain hugely important, but air conditioning and comfort cooling are now moving much further up the list.
There are several reasons for this.
Firstly, London summers are becoming hotter and more uncomfortable. High temperatures are no longer limited to the occasional warm weekend in July or August. Heatwaves are becoming more intense, and many London homes — particularly flats, loft conversions, top-floor apartments and heavily glazed new-build properties — can become extremely uncomfortable during hot periods.
Secondly, working patterns have changed. More people now work from home for part of the week, which means daytime comfort in the home matters far more than it did when most people were out of the house all day.
Thirdly, international buyers and tenants often arrive with different expectations. A buyer relocating from the US, for example, may find it surprising that a £3m London family house or a £5,000 per week apartment does not automatically include proper cooling. In many overseas markets, air conditioning is viewed in the same way that central heating is viewed in the UK — a basic component of a modern home.
Finally, prime London property has become increasingly specification-led. Buyers at the upper end of the market are comparing properties not only by location and square footage, but also by finish, technology, energy performance, wellness features and overall living comfort.
How many London properties actually have air conditioning?
Reliable data on air conditioning in London homes is still relatively limited, particularly because there is a difference between portable units, fixed split systems, comfort cooling systems and fully integrated whole-home solutions.
However, the direction of travel is clear.
Recent reporting suggests that UK air conditioning ownership has increased significantly, with more than 4 million UK homes now estimated to have some form of air conditioning, including both portable and built-in units.
That said, air conditioning remains far from standard. Research from Benham & Reeves in 2025 suggested that only 2.3% of available London sale listings specifically mentioned air conditioning, compared with 1.2% across England.
In practice, this reflects what we see on the ground. Air conditioning is still relatively rare across the wider London housing market, but it is becoming much more common in:
- Prime central London apartments
- Newly built luxury developments
- Recently refurbished family houses
- High-end lateral apartments
- Large houses with basement leisure space
- International landlord-owned rental properties
- Homes designed specifically for overseas occupiers
It is also increasingly common in principal bedroom suites, loft conversions, media rooms, home offices and south-facing reception spaces.
For clients relocating to London, the issue is often not whether they want air conditioning throughout the entire property, but whether the most important rooms can be cooled effectively — particularly bedrooms.
Why London homes can overheat
Many London homes were built for a very different climate.
Victorian and Edwardian houses can perform well in some respects, particularly where they have high ceilings, solid walls and good cross-ventilation. However, they can also be difficult to cool where there are loft conversions, large rear extensions, roof lights, poor insulation or limited airflow.
Modern apartments can have the opposite problem. They may be well insulated and highly glazed, but this can lead to overheating during the summer, particularly in single-aspect flats, top-floor units and apartments with large south or west-facing windows.
Common overheating issues include:
- Top-floor bedrooms and loft conversions becoming too hot at night
- Large glass extensions trapping solar gain
- Poor cross-ventilation in apartments
- Single-aspect flats with limited airflow
- South and west-facing rooms overheating in the afternoon
- Basement spaces requiring mechanical ventilation
- New-build apartments retaining heat due to modern insulation standards
This is why air conditioning in London homes is not simply about luxury. For some homes, it can materially improve day-to-day usability.
The planning and practical restrictions
Installing air conditioning in London homes is often more complicated than people expect.
The main issue is usually the external condenser unit. Traditional air conditioning systems normally require an external unit to expel heat. In London, this can create planning, visual, leasehold and noise concerns.
The restrictions are particularly relevant for:
- Flats and mansion blocks
- Listed buildings
- Conservation areas
- Buildings with strict freeholder consent requirements
- Properties where external alterations are restricted
- Houses with limited rear elevation space
- Homes close to neighbouring windows or terraces
Air source heat pump and cooling installations may sometimes fall within permitted development rights, but only where all relevant limits and conditions are met. There are important restrictions around size, positioning, conservation areas, listed buildings and whether the system is being used solely for cooling.
In conservation areas or listed buildings, the position and visibility of external units can be a major issue. Noise can also be a point of objection, particularly where condensers are close to neighbouring bedrooms, terraces or gardens.
In leasehold buildings, planning permission may only be one part of the challenge. A buyer or tenant may also need consent from the freeholder, managing agent or residents’ management company. Some buildings will not permit external condensers at all.
This is why it is important to investigate the position before committing to a purchase or tenancy.
The London planning approach: passive cooling first
London planning policy has generally encouraged developers to reduce overheating through design before relying on mechanical air conditioning.
The London Plan cooling hierarchy encourages measures such as reducing internal heat generation, limiting solar gain through shading and glazing, using green roofs and walls, improving ventilation, and only then considering active cooling systems.
This is an important point.
The future is unlikely to be a simple choice between “no air conditioning” and “air conditioning everywhere”. The more sensible direction is likely to be better-designed homes, better insulation, better shading, improved ventilation, higher-performing glazing and efficient cooling systems where genuinely required.
The rise of internal and water-cooled systems
One of the more interesting developments in the London market is the growth of internal air conditioning systems, including water-cooled systems that do not require a traditional external condenser.
These can be particularly relevant for apartments, listed buildings, conservation areas and buildings where external alterations are restricted.
Water-cooled air conditioning systems work differently from traditional split systems. Instead of using an external condenser to reject heat into the outside air, they use water for heat exchange and can be installed internally, subject to the property’s plumbing, drainage, technical suitability and building consent requirements.
This does not mean they are suitable for every property. There can be cost, installation, maintenance, water usage and technical considerations. However, they are an important part of the conversation, particularly in prime London apartments where external condensers may be difficult or impossible.
For buyers and tenants, this means the question should not simply be:
“Does the property already have air conditioning?”
It should also be:
“If it does not, is there a realistic and compliant route to installing comfort cooling?”
Air conditioning and energy performance
The energy efficiency of the home is also becoming increasingly important.
A well-insulated, well-designed property should be easier and more affordable to keep cool. Conversely, a poorly insulated home with excessive solar gain, inefficient glazing and poor ventilation may require more energy to cool effectively.
This is where air conditioning links naturally with wider energy performance.
When assessing a property, buyers should consider:
- EPC rating and overall energy efficiency
- Quality of glazing
- Insulation levels
- Orientation and solar gain
- Roof lights and large glass extensions
- Ventilation strategy
- Existing heating and cooling systems
- Whether solar panels or battery storage could be relevant
- Running costs and likely usage patterns
For many clients, the goal is not to run air conditioning constantly throughout the summer. It is to have the ability to cool key rooms efficiently during the hottest days and nights of the year.
This is especially important for bedrooms, nurseries, home offices and top-floor spaces.
Energy-efficient homes should generally be more comfortable and cost-effective to run, but they also need to be designed carefully to avoid overheating. In some modern homes, excellent insulation without adequate ventilation or shading can actually contribute to summer discomfort.
What this means for buyers
For buyers, air conditioning should now form part of the due diligence process, particularly in prime London.
Before making an offer, it is sensible to consider:
- Does the property already have air conditioning or comfort cooling?
- If yes, which rooms are served?
- Is it a proper fixed system or portable units?
- How old is the system?
- Has it been serviced properly?
- Are there external condensers?
- Were all necessary consents obtained?
- Is there any planning history or neighbour objection?
- Can the system provide heating as well as cooling?
- What are the likely running costs?
- If the property does not have AC, can it be installed?
This is particularly important where a client is buying a flat, a listed property, a house in a conservation area or a property that has recently been refurbished. A beautifully presented home may still be very difficult to cool if the relevant permissions, routes and technical options have not been properly considered.
It is also worth factoring this into value.
A property with well-designed, discreet and properly consented comfort cooling may stand out, especially in the prime and super-prime market. Conversely, a property that overheats and has no obvious route to installing cooling may be less attractive to future buyers, particularly international buyers.
If you are considering a London purchase and would like independent advice, our London Property Search service helps private clients assess, source and secure the right property with confidence.
What this means for tenants
For tenants, air conditioning is becoming a more frequent search requirement, especially among overseas families relocating to London.
This can create challenges because the rental market already has limited supply, particularly for high-quality family homes close to leading schools. Adding air conditioning as a non-negotiable requirement can reduce the available options considerably.
For this reason, tenants may need to decide early whether air conditioning is:
- Essential throughout the property
- Essential only in bedrooms
- Essential in the principal bedroom and home office
- A preference, but not a deal-breaker
- Something they would consider installing with landlord consent
For landlords, there is a clear opportunity here. In the right property and price bracket, air conditioning can make a rental home more attractive, particularly to corporate tenants, American families and senior executives relocating to London.
However, landlords should ensure any installation is properly specified, consented, maintained and compliant.
For tenants relocating to London, our London Property Rental Search service provides expert guidance, market access and professional representation throughout the search and negotiation process.
Where we see demand strongest
At Ridgestone Property, we see the strongest demand for air conditioning and comfort cooling from:
- US families relocating to London
- European clients moving from warmer cities
- Middle Eastern clients seeking a London base
- Corporate tenants used to high-specification accommodation
- Buyers looking at new-build or recently refurbished homes
- Families with young children or babies
- Clients working from home regularly
- Buyers purchasing top-floor apartments or lateral flats
- Tenants searching during or just after a heatwave
The highest demand is usually in prime Central, West and South West London, including areas such as Kensington, Chelsea, Notting Hill, Marylebone, St John’s Wood, Fulham, Parsons Green, Wimbledon and Richmond.
In these markets, air conditioning in London homes is not always expected, but it is increasingly noticed.
Our advice
Air conditioning is becoming a more important part of the London property conversation, but it should be considered carefully.
For some properties, it is a valuable and sensible improvement. For others, passive measures such as shading, ventilation, insulation upgrades, blinds, window treatments or improved glazing may be the better first step.
The key is to look at the property properly and understand the practical, legal and technical position before making assumptions.
For buyers, this means investigating whether existing systems are properly installed and whether new systems could be added if required.
For tenants, it means being clear from the outset about whether air conditioning is essential or simply preferred.
For landlords and sellers, it means recognising that cooling is likely to become a more important differentiator, especially for overseas clients and the upper end of the London market.
Where appropriate, Ridgestone Property can also introduce clients to trusted specialists through our Expert Property Network, including consultants, contractors and advisers who can assist with technical due diligence and property improvement advice.
Final thoughts
London homes are changing because the climate, working patterns and buyer expectations are changing.
Air conditioning may once have been viewed as unnecessary in the UK, but for many London buyers and tenants — particularly those relocating from overseas — it is now a serious consideration.
This does not mean every London home needs full air conditioning. But it does mean that comfort cooling, overheating risk and energy performance should now be part of any serious property search, acquisition or rental decision.
At Ridgestone Property, we help private clients navigate the London property market with detailed, impartial and practical advice. Whether you are relocating to London, searching for a rental property, purchasing a family home or assessing whether a property can be improved, we look beyond the brochure and help you understand the full picture.
From air conditioning in London homes and energy efficiency to planning restrictions, negotiation strategy and long-term resale considerations, our role is to ensure you secure the right property, on the right terms, with confidence.
If you are considering a London property search, rental search or acquisition and would like expert guidance, please contact Ridgestone Property for a confidential discussion.
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