Air conditioning for extensions and kitchen-diners in Corsham
In the South West, a system that heats well through damp winters is often as valuable as summer cooling. In Corsham, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
For a kitchen-diner in Corsham, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Corsham sits around 19 miles from Swindon, inside our Wiltshire area. Postcode districts we cover here include SN13.
Prices in Corsham
Our South West England guide price for air conditioning for extensions and kitchen-diners is £1,450–£4,450 per space, VAT included. It sits near the middle of UK prices. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. 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
For most houses in Corsham, 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
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. We book surveys in Corsham at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included as standard in Corsham:
- Placement clear of the hob and oven
- 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
If you are just outside Corsham, we also work in Chippenham (3 miles), Calne (8 miles) and Trowbridge (8 miles). See all services in Corsham or air conditioning for extensions and kitchen-diners across Wiltshire.