Air conditioning for extensions and kitchen-diners in Folkestone
For a kitchen-diner in Folkestone, 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.
An extension in Folkestone with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Folkestone sits around 31 miles from Maidstone, inside our Kent area. Homes in CT19 are all within our coverage.
Prices in Folkestone
Guide prices around Folkestone run from £1,745 to £5,445 per space including VAT. Prices here sit above the national middle, reflecting South East England labour rates and parking and access costs. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. For reference, the Large single option in Folkestone (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
Since 29 May 2025, England's permitted development rules allow larger outdoor units (up to 1.5 m³) and no longer require a 1 m gap to the boundary, provided the MCS 020(a) noise check is met. Listed buildings and pitched-roof installs still need permission.
The survey
A survey in Folkestone usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes. 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
Every job in Folkestone includes:
- Pressure test, vacuum and commissioning
- Free survey with glazing and roof heat-gain check
- Handover of the remote or app
- One or two units sized for the whole space
- Placement clear of the hob and oven
Nearby
Close to Folkestone, our coverage also includes Dover (7 miles), Ashford, Kent (13 miles) and Deal (14 miles). See all services in Folkestone or air conditioning for extensions and kitchen-diners across Kent.