Air conditioning for extensions and kitchen-diners across Dorset
An extension in Bournemouth with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. For a kitchen-diner in Bournemouth, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Coastal breezes help, but inland South West towns and glazed rooms still see uncomfortable peaks.
Prices in Dorset
Budget around £1,450–£4,450 per space including VAT for air conditioning for extensions and kitchen-diners in and around Dorset. That is close to the UK middle for this kind of work. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,050–£2,850 in this area.
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
Surveys in Dorset cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. On a survey in Dorset 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.
What is included
Included with air conditioning for extensions and kitchen-diners across Dorset:
- Handover of the remote or app
- 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
- Placement clear of the hob and oven
Towns in Dorset
Pick your town for local details, or see every service in Dorset.