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London

Multi-split air conditioning in London

We plan and fit multi-split air conditioning throughout London. Every job starts with a free survey and ends with commissioning and a handover.

  • from £3,245Local guide price
  • Usually 1–3 daysTypical time
  • 78Districts covered
Get a guide price0800 088 6341
Multi-split air conditioning
  • Free survey and written quote
  • Refrigerant work by F-gas certified engineers
  • Price fixed in writing
  • England, Scotland, Wales and NI
  • Cools in summer, heats in winter

Multi-split air conditioning across London

In a house in Westminster with a usable loft, multi-split pipes can often run through it so the front stays clear. Twin and triple systems suit Westminster homes where bedrooms sit above the kitchen and one rear wall can take the outdoor unit. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.

Prices in London

For London, expect roughly £3,245 to £10,245 for 2–4 rooms, VAT included, adjusted for typical London rates. London is one of the dearer parts of the UK for trades, which shows in the range. What moves a quote in London up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Triple option in London (three rooms with mixed indoor styles and Wi-Fi control throughout) usually comes to about £4,395–£7,195.

Twin

£3,245–£5,195
inc VAT, London guide

Two rooms on one outdoor unit, wall-mounted indoor units, standard routes.

Balanced choice

Triple

£4,395–£7,195
inc VAT, London guide

Three rooms with mixed indoor styles and Wi-Fi control throughout.

Quad

£5,845–£10,245
inc VAT, London guide

Four or five rooms, longer concealed runs or a ducted unit in a loft void.

Guide prices show VAT at 20%. HMRC treats most fixed air conditioners and air-to-air heat pumps installed in homes as energy-saving materials, zero-rated until 31 March 2027 when we supply and fit them. If your installation qualifies, your quote shows 0% VAT and a lower price. Servicing, repairs, cleaning and controls are charged at 20%.

Planning and permissions

Since 29 May 2025, England's permitted development rules allow larger outdoor units (up to 1.5 m³) and no longer require a 1 m gap to the boundary, provided the MCS 020(a) noise check is met. Listed buildings and pitched-roof installs still need permission.

The survey

We book surveys in London at a time that suits you, including early evenings by arrangement, and send the written quote afterwards. At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote.

What is included

Included with multi-split air conditioning across London:

  • Commissioning and a walk-round of every room's controls
  • One outdoor unit sized to the combined load
  • Free survey with a room-by-room heat-gain check
  • An indoor unit and controls for every room
  • Planned pipe routes through lofts, floors or trunking
  • Pressure test, vacuum and refrigerant charge calculated for the pipe lengths

Districts in London

Pick your district for local details, or see every service in London.

FAQ

Multi-split air conditioning in London

Will the outdoor unit need planning permission in London?

Most houses can have an outdoor unit under permitted development if it meets the size, number and MCS 020(a) noise conditions. Flats and listed buildings usually need permission or consent. We check on survey.

Which parts of London do you cover?

All of London, including Islington, Westminster, Bexley and Barking. Each district has its own page below with local details.

Is the survey free?

Yes, for new installations on the mainland. The survey and written quote are free and there is no obligation.

How much does multi-split air conditioning cost in London?

Our London guide range is £3,245–£10,245 for 2–4 rooms, including VAT.

Is multi-split cheaper than single splits?

For two or three rooms close together it is often similar or slightly cheaper, and it uses one outdoor unit instead of several. For rooms far apart, single splits can work out cheaper because the pipe runs are shorter.

Can I add another room later?

Only if the outdoor unit has spare ports and capacity. If you think you might extend, tell us at survey and we will size for it.

Next step

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