Air conditioning for extensions and kitchen-diners in Sunderland
An extension in Sunderland with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. In the North East, sizing for winter heating and then checking summer cooling usually gives the right system.
In Sunderland, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Sunderland sits around 10 miles from Newcastle upon Tyne, inside our Tyne and Wear area. We cover SR1 and SR9 and the streets around them.
Prices in Sunderland
Budget around £1,345–£4,095 per space including VAT for air conditioning for extensions and kitchen-diners in and around Sunderland. It is a touch below the UK middle, as trade rates in North East England tend to be. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. For reference, the Large single option in Sunderland (one 5–7 kW unit for a large glazed space) usually comes to about £1,895–£2,595.
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
On a survey in Sunderland 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. A survey in Sunderland 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
What a job in Sunderland covers:
- Pressure test, vacuum and commissioning
- 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
- One or two units sized for the whole space
Nearby
We also cover Seaham (5 miles), Washington (5 miles) and Houghton-Le-Spring (6 miles). See all services in Sunderland or air conditioning for extensions and kitchen-diners across Tyne and Wear.