Air conditioning for extensions and kitchen-diners in Christchurch
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. In Christchurch, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
An extension in Christchurch with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Christchurch lies roughly 4 miles from Bournemouth, and we cover it as part of Dorset. We cover BH23 and the streets around them.
Prices in Christchurch
For Christchurch, expect roughly £1,450 to £4,450 per space, VAT included, adjusted for typical South West England rates. 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. On our South West England figures, the Large single option (one 5–7 kW unit for a large glazed space) is 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
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
Surveys in Christchurch cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. A survey in Christchurch usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes.
What is included
Included as standard in Christchurch:
- Placement clear of the hob and oven
- Handover of the remote or app
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
Nearby
If you are just outside Christchurch, we also work in Bournemouth (4 miles), New Milton (5 miles) and Ferndown (7 miles). See all services in Christchurch or air conditioning for extensions and kitchen-diners across Dorset.