Multi-split air conditioning in Chiswick
Many London homes are flats or tall terraces, where heat rises to the top floor and the bedrooms bear the brunt of a hot spell. Twin and triple systems suit Chiswick homes where bedrooms sit above the kitchen and one rear wall can take the outdoor unit.
Multi-split is a good fit for Chiswick flats and maisonettes where only a balcony or one rear wall is available. We cover Chiswick as part of London, roughly 6 miles from central London. Postcode districts we cover here include W4.
Prices in Chiswick
Guide prices around Chiswick run from £3,245 to £10,245 for 2–4 rooms including VAT. Prices here sit above the national middle, reflecting London labour rates and parking and access costs. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. Typical Triple work (three rooms with mixed indoor styles and Wi-Fi control throughout) lands around £4,395–£7,195 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
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. On a survey in Chiswick the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Included with multi-split air conditioning in Chiswick:
- An indoor unit and controls for every room
- Pressure test, vacuum and refrigerant charge calculated for the pipe lengths
- Free survey with a room-by-room heat-gain check
- One outdoor unit sized to the combined load
- Commissioning and a walk-round of every room's controls
Nearby
Nearby, we also cover Acton (1 mile), Barnes (1 mile) and Shepherds Bush (2 miles). See all services in Chiswick or multi-split air conditioning across London.