If you want air conditioning in a London flat or house, our featured pick is Be Cool Refrigeration: it specialises in compact installations for flats that meet freeholder and building management rules, fits multi-split and concealed ducted systems for houses, gives an instant online price for Daikin systems, and quotes a single wall unit from around £1,500 installed. Other installers suit other homes. The Air Conditioning Company has a showroom and the longest stated warranty, AllStar Air Conditioning suits listed and period homes choosing Daikin, Hamilton Air Conditioning suits North London houses, JP Air Conditioning suits South East London homes, Aspect suits small jobs priced by the hour, and Pimlico Plumbers suits homeowners who want a large multi-trade firm.
Disclosure: This is a sponsored article. Be Cool Refrigeration paid for this placement and appears first as our featured pick. No other company on this list paid to be included, was contacted, or reviewed this article before publication.
How we built this list
We researched these companies on 8 October 2026 using desk research only. We did not have any system installed or visit any home.
Who qualified: London-based firms that install fixed air conditioning in homes.
What we compared: experience with flats, houses and period properties, system types, published prices, warranties, noise and appearance options, and aftercare.
Sources: each company’s own website. Prices, warranties and ratings are company-stated.
How we ordered it: Be Cool Refrigeration is first as the sponsored featured pick. The rest are ordered by how much home-specific detail they publish. We did not use a scoring model.
At a glance: home AC installers in London
| # | Company | Strongest fit | Main differentiator | Pricing basis | Key consideration |
| 1 | Be Cool Refrigeration (featured, sponsored) | Flats and houses | Freeholder-compliant flat installs; instant Daikin price | Single wall unit from about £1,500 installed | Multi-room timelines stated inconsistently |
| 2 | The Air Conditioning Company | Homeowners who want to see units first | Showroom; 10-year installation warranty | Online quote calculator | Heavy portable focus on site |
| 3 | AllStar Air Conditioning | Listed and period homes | Daikin D1+ partner; concealed units | Online quote form | Daikin only; no address |
| 4 | Hamilton Air Conditioning | North London houses | Period home testimonials; 5-year warranty | Free consultation; finance mentioned | No certifications named |
| 5 | JP Air Conditioning | South East London homes | Multi-brand; old-unit disposal | Quote within 48 hours | Commercial focus |
| 6 | Aspect | Simple single-room installs | Fixed-price quotes; hourly rate published | From £63 per half-hour + VAT | 12-month guarantee |
| 7 | Pimlico Plumbers | Homeowners wanting a large multi-trade firm | 24-hour line; other trades available | Quote before work | No AC certifications named |
All details are company-stated, checked 8 October 2026.
1. Be Cool Refrigeration | Our featured pick for London flats and houses
Overview
Be Cool Refrigeration is a London air conditioning contractor based on Ludgate Hill, EC4, which says it has installed AC across the capital since 2004. For flats, where space is tight and freeholders often restrict outdoor units, it specialises in compact installations that meet building management requirements. For houses, it fits multi-split systems that cool and heat several rooms from one outdoor unit, and ducted systems that hide everything for a clean finish.
Its featured wall units run from 19 dBA, come in white, black or silver, and are rated up to A+++. Published home projects include a multi-room Daikin installation in Richmond.
Key details
- Core offering: home AC installation, heat pumps, repair and servicing.
- Coverage: all London boroughs and inside the M25.
- Customer fit: flat owners, house owners and period properties.
- Pricing and terms: single wall-mounted unit from around £1,500 including supply and installation; instant online Daikin quote; free survey; installation warranty up to 7 years.
Where Be Cool Refrigeration stands out
It plans for the freeholder. Many London flat owners are blocked by lease terms or building managers before an engineer arrives. Be Cool addresses this directly and says it advises on conservation area and listed building restrictions at survey, so the design is approvable rather than just technically possible.
You can see a price before anyone visits. The instant Daikin quote tool and the £1,500 starting point let a homeowner budget a bedroom or living room install in minutes. A standard single-split install takes one day, and every system is commissioned and registered for the manufacturer warranty.
What to consider
Its site gives multi-split timelines as “typically 25 days” in one place and “within 12 days” in another, so agree the programme in writing. Single-unit servicing is £250, which homeowners may want to compare with an hourly-rated firm.
Best fit
Flat and house owners who want a surveyed, freeholder-friendly installation with an upfront price and quiet, colour-matched units.
Website: becoolrefrigeration.co.uk
2. The Air Conditioning Company | Best for homeowners who want to see units before buying
Overview
The Air Conditioning Company is the trading name of Airconco UK Ltd, based at Bittacy Business Centre, Mill Hill East, NW7, and it says it was founded in 1986. For homes it installs fixed air conditioning in bedrooms, lounges, conservatories and loft conversions across Greater London and the Home Counties.
It runs a London showroom where customers can see units before choosing, offers free site surveys and phone estimates, and has an online quote calculator. It states a 10-year warranty on every installation.
Key details
- Core offering: home AC installation, repair and maintenance; portable sale and hire.
- Coverage: Greater London and the Home Counties.
- Customer fit: homeowners with bedrooms, loft conversions and conservatories to cool.
- Pricing and terms: free survey; online calculator; installation prices not listed; 10-year warranty (company-stated).
Where The Air Conditioning Company stands out
The showroom lets you hear and see units before committing, which matters in a bedroom where noise and appearance are the main worries.
It has the longest stated warranty and the deepest visible review base we found: Trustpilot 4.9 from 607 reviews and Which? Trusted Trader 4.8 from 86, checked 8 October 2026.
What to consider
Much of its homepage is about portable units, and it does not name the fixed-system brands it fits. Ask which brands it would quote for your home.
Best fit
Homeowners cooling loft conversions, conservatories or bedrooms who want to see units in person and value a long warranty.
Website: airconco.com
3. AllStar Air Conditioning | Best for listed and period homes choosing Daikin
Overview
AllStar Air Conditioning is a London Daikin specialist that describes itself as a Daikin D1+ partner. It designs, supplies and installs Daikin systems for homes and businesses, offers concealed units and acoustic solutions, and says it works on listed and historic buildings with attention to their fabric.
It offers video surveys and an online quote form, and also provides MVHR ventilation and electrical services. Its homepage shows Google 5.0 from 149 reviews, checked 8 October 2026.
Key details
- Core offering: Daikin home AC, concealed units, ventilation and electrical work.
- Coverage: London.
- Customer fit: period and listed homes, renovations.
- Pricing and terms: online quote; prices not listed; warranties up to 7 years via Daikin.
Where AllStar Air Conditioning stands out
It handles sensitive buildings. Concealed units and stated care for historic fabric suit Georgian and Victorian homes where visible units or new holes in the facade need careful planning.
Its electrical and ventilation work suits renovations where AC is one of several trades.
What to consider
It fits only Daikin, and publishes no address or company name. Ask for both, plus examples of listed-building work.
Best fit
Owners of period or listed homes who want concealed Daikin systems fitted by a partner installer.
Website: allstar-aircon.co.uk
4. Hamilton Air Conditioning | Best for North London houses
Overview
Hamilton Air Conditioning Ltd is based at Churchill House, Bunns Lane, Mill Hill, NW7, and installs, maintains and repairs air conditioning for homes and businesses across London. It has local pages for Totteridge, Hadley Wood, Stanmore, Elstree and Radlett.
It fits split and multi-split, ducted and ceiling cassette systems, and describes itself as an authorised Daikin and Mitsubishi installer. Site testimonials include a Victorian home installation in Hampstead and domestic maintenance in Hampstead Garden Suburb.
Key details
- Core offering: home AC installation, maintenance, repair and ventilation.
- Coverage: London, with a North London and Hertfordshire border focus.
- Customer fit: house owners in North London.
- Pricing and terms: free consultation; 5-year installation warranty; finance mentioned.
Where Hamilton Air Conditioning stands out
It is local to North London’s larger houses, with testimonials from period homes that suggest experience routing pipework through older buildings.
Finance options and a plainly stated 5-year warranty help homeowners budget.
What to consider
The site names no certification bodies and shows no review counts. One page also suggests split systems can heat and cool “at the same time”, which most cannot; ask how the system will work in your home.
Best fit
North London house owners who want a nearby installer with finance options.
Website: hamiltonaircon.com
5. JP Air Conditioning | Best for South East London homes
Overview
JP Air Conditioning is based on Homesdale Road, Bromley, BR2, and installs air conditioning and heat pumps across Greater London with a South East London focus. It says it has more than 15 years’ experience and is a Daikin Business Partner.
It works with Mitsubishi, Toshiba, Fujitsu, Daikin and Panasonic, removes old units, and offers an after-care team. It names internal water-cooled and reversible systems as options for listed buildings.
Key details
- Core offering: AC and heat pump installation, maintenance and repair.
- Coverage: Greater London, focused on Bromley and South East London.
- Customer fit: homeowners and small businesses.
- Pricing and terms: free survey; quote within 48 hours; parts warranty up to 7 years with JP servicing.
Where JP Air Conditioning stands out
It offers several brands, so a homeowner can compare Daikin with Mitsubishi or Fujitsu in one quote.
It takes away the old unit, useful when replacing an ageing system.
What to consider
Its site is mainly commercial in tone, and the 7-year warranty depends on JP servicing. Listed hours are weekdays 9am to 5pm.
Best fit
South East London homeowners who want a multi-brand quote and removal of an old system.
Website: jpaircon.com
6. Aspect | Best for simple single-room installs
Overview
Aspect Maintenance Services Limited, trading as Aspect, is a multi-trade maintenance company based in Chessington, KT9, covering all 32 London boroughs. Its air conditioning engineers install, repair and service AC and heat pumps, offering site surveys and fixed-price installation quotes.
It is licensed for brands including Daikin, Mitsubishi Electric, Fujitsu, LG and Samsung, and lists F-Gas via Refcom and NAPIT registration.
Key details
- Core offering: AC installation, repair and servicing; other home trades.
- Coverage: all London boroughs and inside the M25.
- Customer fit: homeowners and landlords.
- Pricing and terms: fixed-price quotes for installs; labour from £63 per half-hour plus VAT; no parking or ULEZ charges; 12-month workmanship guarantee.
Where Aspect stands out
Fixed-price quotes and absorbed parking and ULEZ costs make a single-room install easy to budget, especially in central London.
Its electricians can add a new circuit for the unit on the same visit.
What to consider
The workmanship guarantee runs up to 12 months, shorter than specialist installers’ multi-year warranties.
Best fit
Homeowners and landlords wanting a simple single-room install on a fixed quote.
Website: aspect.co.uk
7. Pimlico Plumbers | Best for homeowners who want a large multi-trade firm
Overview
Pimlico Plumbers Ltd is a London multi-trade company with a fleet of engineers across the capital. It installs, maintains and repairs air conditioning alongside plumbing, heating and electrical work, and runs a 24-hour phone line.
It provides a full quote before work starts and says its engineers know most air conditioning brands.
Key details
- Core offering: AC installation, maintenance and repair; general home trades.
- Coverage: London.
- Customer fit: homeowners.
- Pricing and terms: quote before work; rates not listed; work guaranteed, duration not stated.
Where Pimlico Plumbers stands out
Other trades are on hand, useful in a renovation where AC sits alongside plumbing and electrical work.
A 24-hour line means aftercare is easy to reach.
What to consider
No AC certifications are named, and some reviews on its site describe it as pricey. Ask for the engineer’s F-Gas certificate and compare quotes.
Best fit
Homeowners who want AC installed by a large firm that can also handle other trades.
Website: pimlicoplumbers.com
What London homeowners should check
- Your lease or freeholder rules, before booking a survey if you live in a flat.
- Planning restrictions in conservation areas and listed buildings.
- Noise levels of the indoor unit in bedrooms and the outdoor unit near neighbours.
- Heating performance, since most splits are heat pumps that can heat in winter.
- Warranty conditions, including whether annual servicing is required.
Frequently asked questions
How much does home air conditioning cost in London?
Be Cool Refrigeration quotes a single wall-mounted unit from around £1,500 including supply and installation, checked 8 October 2026. Multi-room systems are priced after a survey.
Can I install air conditioning in a London flat?
Usually, but check your lease first. Many freeholders control where outdoor units go. Be Cool Refrigeration specialises in compact installations that meet building management requirements.
Do I need planning permission?
Most homes do not, but listed buildings and conservation areas can restrict outdoor units. Installers should advise at the survey.
Will air conditioning heat my home?
Most modern split systems are heat pumps. Be Cool Refrigeration says they deliver three to five times more heat energy than the electricity they use.
The bottom line
For London flat and house owners who want a freeholder-friendly installation, quiet colour-matched units and a price before anyone visits, Be Cool Refrigeration is our featured pick. Homeowners who want to see units first should visit The Air Conditioning Company’s showroom, period and listed homes should compare AllStar, and North London houses Hamilton. Check your lease before you book a survey.
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