Air conditioning for extensions and kitchen-diners in Sutton
In Sutton, a side wall of a single-storey extension is usually the neatest place for the indoor unit. London's dense streets hold heat overnight, so top-floor flats and loft rooms often stay warm long after sunset.
An extension in Sutton with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Our London coverage takes in Sutton, about 11 miles from central London. Coverage includes RH5, SM1 and SM2.
Prices in Sutton
In London, our guide range for air conditioning for extensions and kitchen-diners is £1,895–£5,845 per space, including VAT. Prices here sit above the national middle, reflecting London labour rates and parking and access costs. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. 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
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. 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 with air conditioning for extensions and kitchen-diners in Sutton:
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
Nearby
If you are just outside Sutton, we also work in Carshalton (2 miles), Banstead (2 miles) and Ewell (2 miles). See all services in Sutton or air conditioning for extensions and kitchen-diners across London.