Air conditioning for extensions and kitchen-diners in Dronfield
An extension in Dronfield with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. In the East Midlands, one system that cools in summer and heats efficiently in winter makes good use of the investment.
In Dronfield, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Dronfield is about 26 miles from Derby and falls within our Derbyshire coverage. Postcode districts we cover here include S18.
Prices in Dronfield
Guide prices around Dronfield run from £1,395 to £4,245 per space including VAT. That sits a little below the UK middle, reflecting typical East Midlands labour rates. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. As an example, the Large single option (one 5–7 kW unit for a large glazed space) would typically be £1,945–£2,745 here.
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
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. A survey in Dronfield usually takes one to two hours. We measure the rooms, check the walls and the consumer unit, agree the outdoor unit position with you and photograph the pipe routes.
What is included
Included with air conditioning for extensions and kitchen-diners in Dronfield:
- One or two units sized for the whole space
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- Handover of the remote or app
- Pressure test, vacuum and commissioning
Nearby
We also cover Chesterfield (4 miles), Sheffield (6 miles) and Staveley (6 miles). See all services in Dronfield or air conditioning for extensions and kitchen-diners across Derbyshire.