Multi-split air conditioning across West Sussex
Multi-split is a good fit for Crawley flats and maisonettes where only a balcony or one rear wall is available. Twin and triple systems suit Crawley homes where bedrooms sit above the kitchen and one rear wall can take the outdoor unit. The South East sees some of the UK's warmest summer days, and south-facing rooms and conservatories feel it first.
Prices in West Sussex
Multi-split air conditioning in West Sussex typically comes in at £2,995–£9,445 for 2–4 rooms including VAT, based on South East England rates. South East England is one of the dearer parts of the UK for trades, which shows in the range. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. On our South East England figures, the Triple option (three rooms with mixed indoor styles and Wi-Fi control throughout) is about £4,095–£6,645.
Twin
Two rooms on one outdoor unit, wall-mounted indoor units, standard routes.
Triple
Three rooms with mixed indoor styles and Wi-Fi control throughout.
Quad
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
England's rules let most houses fit an outdoor unit without a planning application, as long as the size, number and MCS 020(a) noise conditions are met. Flats, listed buildings and roof-mounted units are treated differently.
The survey
Surveys in West Sussex cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. 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 West Sussex:
- One outdoor unit sized to the combined load
- Pressure test, vacuum and refrigerant charge calculated for the pipe lengths
- Planned pipe routes through lofts, floors or trunking
- Free survey with a room-by-room heat-gain check
- Commissioning and a walk-round of every room's controls
- An indoor unit and controls for every room
Towns in West Sussex
Pick your town for local details, or see every service in West Sussex.