Air conditioning for extensions and kitchen-diners in Glastonbury
An extension in Glastonbury with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Damp South West winters make the dehumidifying side of a heat pump almost as useful as its cooling.
In Glastonbury, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Glastonbury sits around 19 miles from Taunton, inside our Somerset area. Postcode districts we cover here include BA6.
Prices in Glastonbury
Our South West England guide price for air conditioning for extensions and kitchen-diners is £1,450–£4,450 per space, VAT included. That is broadly in line with national guide prices. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. For reference, the Large single option in Glastonbury (one 5–7 kW unit for a large glazed space) usually comes to about £2,050–£2,850.
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
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
On a survey in Glastonbury 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. Surveys in Glastonbury cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare.
What is included
Included as standard in Glastonbury:
- Handover of the remote or app
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
Nearby
Neighbouring places we cover include Street (2 miles), Wells (5 miles) and Shepton Mallet (8 miles). See all services in Glastonbury or air conditioning for extensions and kitchen-diners across Somerset.