Air conditioning for extensions and kitchen-diners in Wallingford
Hot spells reach the South East early, which makes spring the easiest time to arrange an installation. For a kitchen-diner in Wallingford, we place the indoor unit clear of the hob and plan the outdoor unit at the rear.
In Wallingford, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Our Oxfordshire coverage takes in Wallingford, about 12 miles from Oxford. Homes in OX10 are all within our coverage.
Prices in Wallingford
Budget around £1,745–£5,445 per space including VAT for air conditioning for extensions and kitchen-diners in and around Wallingford. That is above the UK middle, mainly because labour and access cost more in South East England. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,495–£3,495 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
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
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. Surveys in Wallingford cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare.
What is included
What a job in Wallingford covers:
- Pressure test, vacuum and commissioning
- Hidden routes during the build, or neat surface routes after
- Placement clear of the hob and oven
- Handover of the remote or app
- One or two units sized for the whole space
Nearby
If you are just outside Wallingford, we also work in Didcot (5 miles), Abingdon (8 miles) and Henley-on-Thames (11 miles). See all services in Wallingford or air conditioning for extensions and kitchen-diners across Oxfordshire.