Air conditioning for extensions and kitchen-diners in Feltham
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 Feltham with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon.
In Feltham, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Feltham sits around 13 miles from central London, inside our London area. We cover TW13 and the streets around them.
Prices in Feltham
For Feltham, expect roughly £1,895 to £5,845 per space, VAT included, adjusted for typical London rates. That is above the UK middle, mainly because labour and access cost more in London. The biggest variables are the pipe route, access for the outdoor unit and the state of the consumer unit, all of which the survey settles. As an example, the Large single option (one 5–7 kW unit for a large glazed space) would typically be £2,695–£3,745 here.
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
Surveys in Feltham cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. We book surveys in Feltham 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 Feltham:
- Pressure test, vacuum and commissioning
- Handover of the remote or app
- Free survey with glazing and roof heat-gain check
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
Nearby
If you are just outside Feltham, we also work in Hanworth (2 miles), Ashford, Surrey (2 miles) and Hounslow (3 miles). See all services in Feltham or air conditioning for extensions and kitchen-diners across London.