Air conditioning for extensions and kitchen-diners across Derbyshire
For a kitchen-diner in Derby, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. An extension in Derby with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Summer peaks in the East Midlands make bedrooms under the roof the hardest rooms to keep comfortable.
Prices in Derbyshire
Guide prices around Derbyshire run from £1,395 to £4,245 per space including VAT. It is a touch below the UK middle, as trade rates in the East Midlands tend to be. 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 East Midlands figures, the Large single option (one 5–7 kW unit for a large glazed space) is 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
For most houses in Derbyshire, 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
We book surveys in Derbyshire at a time that suits you, including early evenings by arrangement, and send the written quote afterwards. On a survey in Derbyshire 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 with air conditioning for extensions and kitchen-diners across Derbyshire:
- Free survey with glazing and roof heat-gain check
- 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
Towns in Derbyshire
Pick your town for local details, or see every service in Derbyshire.