Air conditioning for extensions and kitchen-diners in Carshalton
For a kitchen-diner in Carshalton, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. 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.
In Carshalton, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Carshalton lies roughly 9 miles from central London, and we cover it as part of London. That includes the SM5 postcode district.
Prices in Carshalton
Budget around £1,895–£5,845 per space including VAT for air conditioning for extensions and kitchen-diners in and around Carshalton. 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
We book surveys in Carshalton at a time that suits you, including early evenings by arrangement, and send the written quote afterwards. 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.
What is included
Included as standard in Carshalton:
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
- Hidden routes during the build, or neat surface routes after
- Placement clear of the hob and oven
- Handover of the remote or app
Nearby
Nearby, we also cover Sutton (2 miles), Mitcham (2 miles) and Morden (2 miles). See all services in Carshalton or air conditioning for extensions and kitchen-diners across London.