Air conditioning for extensions and kitchen-diners across Northumberland
An extension in Blyth with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. In Blyth, a side wall of a single-storey extension is usually the neatest place for the indoor unit. Cooler North East summers mean cooling is mostly needed in lofts, conservatories and rooms with large windows.
Prices in Northumberland
In North East England, our guide range for air conditioning for extensions and kitchen-diners is £1,345–£4,095 per space, including VAT. It is a touch below the UK middle, as trade rates in North East England 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. As an example, the Large single option (one 5–7 kW unit for a large glazed space) would typically be £1,895–£2,595 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
A survey in Northumberland 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. We book surveys in Northumberland at a time that suits you, including early evenings by arrangement, and send the written quote afterwards.
What is included
Included with air conditioning for extensions and kitchen-diners across Northumberland:
- Handover of the remote or app
- Hidden routes during the build, or neat surface routes after
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Free survey with glazing and roof heat-gain check
- Pressure test, vacuum and commissioning
Towns in Northumberland
Pick your town for local details, or see every service in Northumberland.