Air conditioning for extensions and kitchen-diners in Whitehaven
Damp North West weather makes the dehumidifying mode of a modern split system genuinely useful for much of the year. In Whitehaven, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
An extension in Whitehaven with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. We cover Whitehaven as part of Cumbria, roughly 35 miles from Carlisle. We cover CA28 and the streets around them.
Prices in Whitehaven
Guide prices around Whitehaven run from £1,395 to £4,245 per space including VAT. It is a touch below the UK middle, as trade rates in North West England tend to be. 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–£2,695 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
England's rules let most houses fit an outdoor unit without a planning application, as long as the size, number and MCS 020(a) noise conditions are met. Flats, listed buildings and roof-mounted units are treated differently.
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 Whitehaven 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 Whitehaven:
- Hidden routes during the build, or neat surface routes after
- Placement clear of the hob and oven
- Pressure test, vacuum and commissioning
- Handover of the remote or app
- One or two units sized for the whole space
Nearby
If you are just outside Whitehaven, we also work in Workington (7 miles), Maryport (12 miles) and Keswick (18 miles). See all services in Whitehaven or air conditioning for extensions and kitchen-diners across Cumbria.

