Multi-split air conditioning in Horsham
The South East sees some of the UK's warmest summer days, and south-facing rooms and conservatories feel it first. In a house in Horsham with a usable loft, multi-split pipes can often run through it so the front stays clear.
Twin and triple systems suit Horsham homes where bedrooms sit above the kitchen and one rear wall can take the outdoor unit. Horsham is about 7 miles from Crawley and falls within our West Sussex coverage. Homes in RH12 are all within our coverage.
Prices in Horsham
Guide prices around Horsham run from £2,995 to £9,445 for 2–4 rooms including VAT. Prices here sit above the national middle, reflecting South East England labour rates and parking and access costs. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. Typical Triple work (three rooms with mixed indoor styles and Wi-Fi control throughout) lands around £4,095–£6,645 in this area.
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
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
The free survey is where the real price is set: room measurements, pipe and drain routes, electrical checks and the outdoor unit position, all written into your quote. We book surveys in Horsham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Here is what is included on every job in Horsham:
- Free survey with a room-by-room heat-gain check
- Pressure test, vacuum and refrigerant charge calculated for the pipe lengths
- An indoor unit and controls for every room
- Planned pipe routes through lofts, floors or trunking
- One outdoor unit sized to the combined load
Nearby
Neighbouring places we cover include Crawley (7 miles), Horley (11 miles) and Haywards Heath (11 miles). See all services in Horsham or multi-split air conditioning across West Sussex.