Air conditioning for extensions and kitchen-diners in Derby
Summer peaks in the East Midlands make bedrooms under the roof the hardest rooms to keep comfortable. In Derby, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
For a kitchen-diner in Derby, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. We cover Derby and the rest of Derbyshire, including Chesterfield and Long Eaton. That includes the DE1 postcode district.
Prices in Derby
Budget around £1,395–£4,245 per space including VAT for air conditioning for extensions and kitchen-diners in and around Derby. That sits a little below the UK middle, reflecting typical East Midlands labour rates. What moves a quote in Derby up or down is mostly pipe length, how high the outdoor unit goes, and whether a new electrical circuit is needed. For reference, the Large single option in Derby (one 5–7 kW unit for a large glazed space) usually comes to about £1,945–£2,745.
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
In England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
The survey
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. On a survey in Derby 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.
What is included
Included as standard in Derby:
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
Nearby
Nearby, we also cover Belper (7 miles), Ilkeston (8 miles) and Heanor (8 miles). See all services in Derby or air conditioning for extensions and kitchen-diners across Derbyshire.