Air conditioning for extensions and kitchen-diners in Exeter
An extension in Exeter with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. In the South West, a system that heats well through damp winters is often as valuable as summer cooling.
In Exeter, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Exeter sits around 36 miles from Plymouth, inside our Devon area. Coverage includes EX2.
Prices in Exeter
Air conditioning for extensions and kitchen-diners in Exeter typically comes in at £1,450–£4,450 per space including VAT, based on South West England rates. That is close to the UK middle for this kind of work. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. As an example, the Large single option (one 5–7 kW unit for a large glazed space) would typically be £2,050–£2,850 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
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
On a survey in Exeter the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows. 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
Included as standard in Exeter:
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- Placement clear of the hob and oven
- Free survey with glazing and roof heat-gain check
Nearby
If you are just outside Exeter, we also work in Heavitree (1 mile), Exmouth (9 miles) and Tiverton (12 miles). See all services in Exeter or air conditioning for extensions and kitchen-diners across Devon.