Air conditioning for extensions and kitchen-diners in Mitcham
In Mitcham, 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 Mitcham with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Our London coverage takes in Mitcham, about 7 miles from central London. Postcode districts we cover here include CR4.
Prices in Mitcham
In London, our guide range for air conditioning for extensions and kitchen-diners is £1,895–£5,845 per space, including VAT. London is one of the dearer parts of the UK for trades, which shows in the range. 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
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
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. We book surveys in Mitcham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Every job in Mitcham includes:
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Free survey with glazing and roof heat-gain check
Nearby
Close to Mitcham, our coverage also includes Morden (1 mile), Wimbledon (2 miles) and Streatham (2 miles). See all services in Mitcham or air conditioning for extensions and kitchen-diners across London.