Air conditioning for extensions and kitchen-diners across Devon
For a kitchen-diner in Plymouth, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. An extension in Plymouth with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. South West summers are milder on the coast, but sheltered towns and south-facing rooms still overheat, and efficient winter heating matters just as much.
Prices in Devon
In South West England, our guide range for air conditioning for extensions and kitchen-diners is £1,450–£4,450 per space, including VAT. That is close to the UK middle for this kind of work. What moves a quote in Devon up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. 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
For most houses in Devon, the outdoor unit is permitted development if it passes the MCS 020(a) noise check (37 dB(A) or less at the nearest neighbouring window) and stays within the size and number limits. We run that check on survey.
The survey
Surveys in Devon cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. 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 with air conditioning for extensions and kitchen-diners across Devon:
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- Placement clear of the hob and oven
- Pressure test, vacuum and commissioning
- Handover of the remote or app
Towns in Devon
Pick your town for local details, or see every service in Devon.