Air conditioning for extensions and kitchen-diners in Herne Bay
Summers in the South East are among the warmest in the country, so cooling often comes first, with efficient winter heating as a bonus. For a kitchen-diner in Herne Bay, we place the indoor unit clear of the hob and plan the outdoor unit at the rear.
An extension in Herne Bay with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Herne Bay lies roughly 27 miles from Maidstone, and we cover it as part of Kent. We cover CT6 and the streets around them.
Prices in Herne Bay
Air conditioning for extensions and kitchen-diners in Herne Bay 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. On our South East England figures, the Large single option (one 5–7 kW unit for a large glazed space) is 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
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 Herne Bay at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included as standard in Herne Bay:
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
Nearby
We also cover Whitstable (5 miles), Canterbury (7 miles) and Faversham (11 miles). See all services in Herne Bay or air conditioning for extensions and kitchen-diners across Kent.