How Much Does Air Conditioning Cost in the UK? 2026

By the AirCon Doctor team · Updated 30 October 2026

The honest answer to “how much does air conditioning cost?” is that it depends on how many rooms you want to cool, which unit suits each room and how easy the property is to work on. But you shouldn’t have to ring round just to get a sense of the numbers, so this guide puts ours on the page.

Below you’ll find the price ranges we quote across London and the South East, what every installation price includes, the things that move a job up or down the range, four real examples and how VAT works. At the end, there’s an independent range from Checkatrade so you can compare.

Our price ranges for 2026

These are the ranges we work to for typical homes and small businesses. All prices are plus VAT.

System	Typical price (+ VAT)
Single room split system	£1,200–£2,200
Two-room multi-split	£2,800–£4,500
Three to five room multi-split	£4,500–£8,500
Commercial VRF / VRV	Priced after a site survey
Annual service	£95–£150
Repair call-out (diagnosis)	From £75

A single room split is one indoor unit and one outdoor unit joined by refrigerant pipework. It’s the most common job we do, usually for a bedroom, home office or living room. A multi-split runs two or more indoor units from one outdoor unit, so you get one box outside instead of several. Larger commercial systems, such as VRF, depend so much on the building that we only price them once we’ve surveyed it. Our prices page keeps the current figures in one place.

What the price includes

Our installation prices include:

supply of the indoor and outdoor units and the materials to fit them;
installation: mounting the units, core drilling, running pipework, cable and the condensate drain;
commissioning: pressure testing, evacuating and charging the system, then checking it runs correctly;
F-Gas documentation, so the refrigerant work is properly recorded.

Every job starts with a site survey, or photos and details for simple jobs, followed by a fixed-price quote. Electrical work is carried out under our NICEIC approval. If your consumer unit or wiring needs more than a standard connection, the survey picks it up and the quote says so in writing, so there are no surprises on the day. Our guide to what a quote should include goes through each line.

What changes the price

Two jobs that both say “one bedroom” can still land at different ends of the range. The main reasons are:

The unit. Capacity, efficiency and design all affect the cost. A premium or design-led indoor unit costs more than a standard one of the same size. We fit leading brands, including Mitsubishi Electric, Daikin, Fujitsu, Panasonic, Toshiba, LG and Samsung.
The pipework route. A short run straight through the wall behind the indoor unit is quick. A long run, or one that goes through a loft or along a hidden route to keep the outside of the house tidy, takes longer.
The walls. Solid brick and stone take longer to core drill than cavity walls.
Where the outdoor unit goes. Ground level on a rear wall is simplest. A high bracket, a flat roof or a spot that needs access equipment adds time.
Electrics. A spare way in a modern consumer unit is easy. An older board or a long cable run adds work.
Consents. Listed buildings, conservation areas and leasehold flats can need permission before work starts. See our planning permission guide.

Real examples from our installations

These are four real jobs from our records, as quoted at the time:

3-bedroom semi-detached, Crawley RH10. Mitsubishi Electric 2.5 kW single unit in the main bedroom. Cavity wall, 4-metre pipework run, outdoor unit on a rear wall bracket. Total: £1,380, including F-Gas certification.
4-bedroom detached, Horsham RH12. Daikin multi-split serving three bedrooms and a home office. Outdoor unit in the side return. One solid brick wall needing a core drill. Total: £5,200, including all four indoor units, the outdoor unit, electrical isolation and F-Gas documentation.
Ground floor office, Guildford GU1. Samsung 5 kW unit in an open-plan office of about 40 m². Simple installation with the outdoor unit on the car park wall. Total: £1,680.
Victorian terraced house, Brighton BN1. LG multi-split for two bedrooms. Solid walls throughout, two core drills. All pipework run inside through the roof void to avoid trunking on the outside. Total: £3,400.

Notice how the Brighton job cost more than a basic two-room system would. That’s the hidden pipe route and solid walls at work, not the brand.

Want it done properly? AirCon Doctor installs, repairs and services air conditioning and heat pumps across London and the South East, from our base in East Grinstead. We’re an F-Gas certified company and NICEIC approved. Get a fixed-price quote.

VAT on air conditioning

For businesses, air conditioning is standard-rated. For homes, it’s less simple. HMRC’s VAT Notice 708/6 zero-rates the installation of certain energy-saving materials in residential accommodation from 1 May 2023 to 31 March 2027, then 5% from 1 April 2027. Air source heat pumps are on the list if they’re permanently fixed, and HMRC says that “most air conditioning units are air source heat pumps”. But it also says the answer depends on the facts of each case.

So we confirm the VAT on your quote rather than assume it. Hotels and similar businesses are standard-rated. This is general information, not tax advice. Our guide to 0% VAT on air conditioning and heat pumps has more detail.

An independent comparison

It’s worth checking any installer’s figures against an outside source. Checkatrade’s air conditioning cost guide (last updated May 2026) gives an average of around £750 for a 12,000 BTU wall-mounted split unit and around £1,150 for installation labour per unit, with electrical work of £400–£700 listed as a separate cost. Its ranges for that size run from £620 to £890 for the unit and £960 to £1,380 for labour.

Those are national averages, built differently from our prices, which already include commissioning and F-Gas paperwork. Use them as a sense check, not a quote.

Running and upkeep costs

The installation is the big cost, but not the only one. An annual service costs £95–£150 + VAT and keeps the system efficient and within the manufacturer’s warranty terms where they ask for servicing. Electricity is the other cost. Our running costs guide shows the sum with today’s Ofgem price cap rate, so you can work it out for your own home.

Getting a fixed price

The quickest route to a firm number is to send us a few photos: the room, the wall where you’d like the indoor unit, the outside wall and your consumer unit. For anything more involved we arrange a site survey. Either way, you get a fixed-price quote, and we reply to enquiries the same working day. Get in touch or call 07833 053749.

Quick answers

How much does it cost to air condition one room?

A single room split system typically costs £1,200–£2,200 + VAT, including supply, installation, commissioning and F-Gas documentation.

How much is air conditioning for a whole house?

A three to five room multi-split typically costs £4,500–£8,500 + VAT. The number of rooms, unit choice and pipe routes set where you land.

Is VAT charged on home air conditioning?

It depends. HMRC zero-rates qualifying air source heat pumps in homes until 31 March 2027 and says most air conditioning units are air source heat pumps, but each case depends on the facts. We confirm the VAT on your quote.

Why do quotes for the same room differ so much?

Usually because they include different things. Check each names the exact unit, the pipework, the electrics, commissioning and F-Gas records.

How much is an air conditioning service?

Our annual service costs £95–£150 + VAT, depending on the system.

Related services

More advice

This guide is general information, checked against the sources linked on 30 October 2026. It isn’t legal, tax or financial advice. Rules, grants and product ranges change, so check the current position before you rely on it.