Air conditioning for extensions and kitchen-diners in Chelsea
An extension in Chelsea with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. 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.
For a kitchen-diner in Chelsea, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Chelsea lies roughly 2 miles from central London, and we cover it as part of London. Coverage includes SW3 and SW10.
Prices in Chelsea
For Chelsea, expect roughly £1,895 to £5,845 per space, VAT included, adjusted for typical London rates. Prices here sit above the national middle, reflecting London labour rates and parking and access costs. What moves a quote in Chelsea up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,695–£3,745 in this area.
Single unit
One 3.5–5 kW unit for a medium extension.
Large single
One 5–7 kW unit for a large glazed space.
Twin units
Two indoor units on a multi-split for long or L-shaped spaces.
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
On a survey in Chelsea 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. 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 as standard in Chelsea:
- Hidden routes during the build, or neat surface routes after
- Placement clear of the hob and oven
- Free survey with glazing and roof heat-gain check
- Handover of the remote or app
- Pressure test, vacuum and commissioning
Nearby
Neighbouring places we cover include Battersea (1 mile), Fulham (1 mile) and Westminster (2 miles). See all services in Chelsea or air conditioning for extensions and kitchen-diners across London.