Air conditioning for extensions and kitchen-diners in Acton
In Acton, a side wall of a single-storey extension is usually the neatest place for the indoor unit. In London, heat soaks into brick and concrete during the day and comes back out at night, which is when it is hardest to sleep.
An extension in Acton with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Our London coverage takes in Acton, about 7 miles from central London. Postcode districts we cover here include W3.
Prices in Acton
Budget around £1,895–£5,845 per space including VAT for air conditioning for extensions and kitchen-diners in and around Acton. That is above the UK middle, mainly because labour and access cost more in London. 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 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
A survey in Acton usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes. Surveys in Acton cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare.
What is included
Included as standard in Acton:
- One or two units sized for the whole space
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- Pressure test, vacuum and commissioning
Nearby
If you are just outside Acton, we also work in Chiswick (1 mile), Shepherds Bush (2 miles) and Willesden (2 miles). See all services in Acton or air conditioning for extensions and kitchen-diners across London.

