Air conditioning for extensions and kitchen-diners across West Sussex
In Crawley, a side wall of a single-storey extension is usually the neatest place for the indoor unit. For a kitchen-diner in Crawley, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. The South East sees some of the UK's warmest summer days, and south-facing rooms and conservatories feel it first.
Prices in West Sussex
Air conditioning for extensions and kitchen-diners in West Sussex typically comes in at £1,745–£5,445 per space including VAT, based on South East England rates. South East England 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. For reference, the Large single option in West Sussex (one 5–7 kW unit for a large glazed space) usually comes to about £2,495–£3,495.
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 West Sussex cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. We book surveys in West Sussex at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included with air conditioning for extensions and kitchen-diners across West Sussex:
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
- Pressure test, vacuum and commissioning
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
Towns in West Sussex
Pick your town for local details, or see every service in West Sussex.