Air conditioning for extensions and kitchen-diners in Swindon
An extension in Swindon 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.
For a kitchen-diner in Swindon, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. We cover Swindon and the rest of Wiltshire, including Salisbury and Trowbridge. That includes the SN1, SN25, SN26 and SN38 postcode districts.
Prices in Swindon
In South West England, our guide range for air conditioning for extensions and kitchen-diners is £1,450–£4,450 per space, including VAT. It sits near the middle of UK prices. What moves a quote in Swindon up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. 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
On a survey in Swindon 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. A survey in Swindon 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
Here is what is included on every job in Swindon:
- Handover of the remote or app
- Placement clear of the hob and oven
- 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
Nearby
We also cover Marlborough (10 miles), Calne (13 miles) and Wantage (15 miles). See all services in Swindon or air conditioning for extensions and kitchen-diners across Wiltshire.