Greater London · Air conditioning installation
Air conditioning installation in Isleworth, Greater London
Air conditioning in Isleworth from an F-Gas certified company, with the manufacturer’s warranty terms explained on your quote. We reply to enquiries the same working day.
- Commercial rooms that are too warm for staff
- A study or office that overheats during the day
- Rooms under the roof that stay hot into the night
Air conditioning installation in Isleworth
Think of it as diagnose, treat and sign off: survey first, install second, commission and hand over last. At sign-off, the system is tested in each mode, the controls are explained and the F-Gas records are left with you. When someone in Isleworth asks us for air con, the first questions are usually price and who will fit it. We publish typical prices and do the refrigerant work as an F-Gas certified company.
Getting the size right matters more than the brand: we look at the room’s size, windows, insulation and use before choosing a unit.
London homes in Isleworth can be short of outside space, so the outdoor unit may end up on a rear wall, a flat roof or a balcony. We look at noise towards neighbours and windows as well as looks, and we plan the pipe route so it’s as short and tidy as the building allows.
Equipment warranty comes from the manufacturer, on its own terms, and we explain those terms on your quote. Terms differ from brand to brand, so we go through them with you rather than leave you to find the small print.
- Location
- Isleworth (TW7, TW1, TW3)
- Wider area
- Greater London
- Price guide
- £1,200–£2,200 + VAT for one room
- Replies
- On the working day you ask
- Accreditations
- NICEIC approved, F-Gas certified
- Pricing
- Fixed, in writing
- Call
- 07833 053749
- Page updated
- 30 October 2026
The process
The visit goes in the diary at a time that works for you, and we let you know if plans need to move. On arrival, the engineer compares the job with the survey, your photos or the details you gave us. Anything unexpected is raised with you before we go further. From there, the work takes anything from a day for one room to several days for a multi-room or ducted system. Let us know who controls access to the building in Isleworth, as that saves time on the day.
- You send photos, or we visit and survey the rooms and outside.
- The system is sized, positions are agreed and the price is fixed.
- Sheets go down first, then the indoor unit and the condenser are mounted.
- Pipework, cable and drain are run, the circuit is connected and the pipework is pressure tested and evacuated.
- It’s switched on, checked and handed over with its records.
Before we arrive
- Dig out any previous service or F-Gas records
- Move furniture away from the wall where we’ll be working
- Plan for pets to be kept clear during the visit
How to get a quote
To help us quote: where the property is and what kind of building it is, a few pictures, the brand and model of anything already fitted and anything you’ve noticed, such as an error code or a noise. Once you have those, phone 07833 053749, or email if that’s easier.
Related advice
Nearby places to Isleworth
Other services in Isleworth
Landlords, agents and facilities managers
Running several properties is easier with one contractor. We work across London and the South East, so a run of properties can go into one programme and kept on a regular cycle.
Keeping records across a portfolio is half the battle. Each visit is written up, with F-Gas records wherever refrigerant work is involved, so you can show what was done and when.
How we price air conditioning
You will get a fixed price before work begins. It’s based on:
- The brand, model and parts involved
- The size of the job
- The pipe route between the units
Homes, offices, shops and public buildings are all priced the same way: what’s needed, how we reach it, the parts and the labour. Ask for a fixed-price quote and we’ll go through it with you.
Before you get in touch
Good pictures often save a visit. Try to include:
- The paperwork from the last service, if you have it
- A few photos of the room and the wall the unit is on, or will go on
- The make and model of the system, from the label
For air conditioning in Isleworth, phone us on 07833 053749, or email if that’s easier. Tell us what kind of property it is and what you’d like done, and send a few photos if you can. Enquiries get a reply the same working day.
Homes in Isleworth and air conditioning
The 2021 Census found about 51% of households live in flats. For a flat, we look at balconies, flat roofs and rear walls for the outdoor unit, and the lease often needs checking first. In London, outdoor unit positions, building rules and access tend to need more planning than the install itself.
With historic houses such as Syon House about 0.9 miles north-east, it’s a reminder that older homes nearby may be listed, which changes the planning rules. Around Church of All Saints, a quick check of the listing and conservation maps is part of planning any install.
Isleworth is about 2 miles north of Twickenham, in Greater London. From the centre of Isleworth to the outskirts, our engineers cover air conditioning, from a single room to a whole building. Isleworth is one of 764 places in Greater London we cover. London, roughly 10 miles off, has its own page on this site.
The closest recent job we can point to from Isleworth was on Richmond Hill, Richmond (TW10), about 2 miles south-east: installing a Mitsubishi Electric Zubadan multi-split system serving four bedrooms, the study and the living room: six indoor units in total. See the job
If your postcode is in TW7, TW1 and TW3, you’re inside the area we cover. You’ll find streets such as Upper Square, London Road and Shire Horse Way, all of which are in our area. Close to Isleworth, our area also takes in Woodlands (1 mile west), St Margarets (1 mile south-east), Ivybridge (1 mile south-west), Spring Grove (1 mile north-west) and Hounslow (1 mile west). Larger places within reach include London (10 miles east), City of Westminster (8 miles east), Marylebone (9 miles north-east) and Kensington (6 miles east).
Local landmarks in Isleworth
Around Isleworth, our work takes us to homes and businesses near The George Inn, Kneller Hall Junior School and Gumley House RC Convent School and the streets around them. There’s a railway station in Isleworth itself: Isleworth station. A little further out are West Middlesex University Hospital (less than half a mile north-east) and Museum of Army Music (1.4 miles south-west). Green spaces nearby include Richmond Hill and Kew Gardens Lake.
Isleworth questions
Can you do air conditioning in Isleworth?
Yes. Isleworth is one of the places we cover. Tell us a little about the job and we’ll take it from there.
Can I fit air conditioning in Isleworth without planning permission?
There’s no single answer: the building and the outdoor unit position decide it. There’s a conservation area, the Isleworth Riverside Conservation Area, close to central Isleworth. Since 2025, an air-to-air heat pump on a house can count as permitted development if it meets the conditions and is not used only for cooling. Listed buildings still need consent, and in a conservation area a road-facing wall or roof is not allowed under those rules. If there’s any doubt, we ask Hounslow council, which is normally the planning authority for Isleworth.
Do you work on commercial properties?
Yes. Homeowners, landlords, agents and businesses all book us in Isleworth and across Greater London. Let us know who the records should go to.
How much is air conditioning for one room?
From £1,200 + VAT for a single-room split, with a typical range of £1,200–£2,200 + VAT. That covers supply, installation, commissioning and the F-Gas paperwork, and we fix it after a survey or from your photos.
Can we book visits on a schedule?
Yes. Maintenance contracts are part of what we do, set at the interval the system and the manufacturer’s terms need. Each visit is written up and F-Gas records kept where they apply.
Why does F-Gas certification matter?
The law says any company working on equipment containing F gas has to be certified, and each engineer needs the right qualifications too. It means the refrigerant in your system is handled legally.
Is there a survey before the work?
Yes, every time. Diagnosis comes before treatment: the survey tells us what the job needs and how to do it and the fixed price is built on it.
How the job changes from property to property
Multi-split systems
Two rooms on a multi-split are typically £2,800–£4,500 + VAT, and three to five rooms £4,500–£8,500 + VAT. The route from the outdoor unit to each room is the main variable.
Pipework and condensate drains
The indoor and outdoor units are joined by insulated refrigerant pipes, a cable and a condensate drain. The route is agreed before any drilling and kept as tidy as the building allows.
What a customer said
“Office air con broke down in the July heatwave. Called at 8am, engineer was here by noon and fixed within 2 hours. Brilliant emergency response. They now hold the service contract for the whole building.”
James T., Crawley, office manager