Air conditioning for extensions and kitchen-diners in Bishops Stortford
An extension in Bishops Stortford with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Long sunny spells in the East of England put conservatories and top-floor rooms under real pressure.
For a kitchen-diner in Bishops Stortford, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. Bishops Stortford sits around 33 miles from Southend-on-Sea, inside our Essex area. That includes the CM23 and CM22 postcode districts.
Prices in Bishops Stortford
Air conditioning for extensions and kitchen-diners in Bishops Stortford typically comes in at £1,595–£4,995 per space including VAT, based on East of England rates. The East of England is one of the dearer parts of the UK for trades, which shows in the range. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £2,295–£3,195 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. At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote.
What is included
Every job in Bishops Stortford includes:
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
- Pressure test, vacuum and commissioning
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
Nearby
Close to Bishops Stortford, our coverage also includes Harlow (7 miles), Hoddesdon (11 miles) and Hertford (11 miles). See all services in Bishops Stortford or air conditioning for extensions and kitchen-diners across Essex.