Air conditioning for extensions and kitchen-diners across County Londonderry
An extension in Derry/Londonderry with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. For a kitchen-diner in Derry/Londonderry, we place the indoor unit clear of the hob and plan the outdoor unit at the rear. In Northern Ireland, cooling is mostly needed in conservatories and glazed rooms, while efficient heating benefits the whole home.
Prices in County Londonderry
Our Northern Ireland guide price for air conditioning for extensions and kitchen-diners is £1,345–£4,095 per space, VAT included. It is a touch below the UK middle, as trade rates in Northern Ireland tend to be. The biggest variables are the pipe route, access for the outdoor unit and the state of the consumer unit, all of which the survey settles. For reference, the Large single option in County Londonderry (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
Planning rules for outdoor units in Northern Ireland differ from Great Britain's, so we check your property with you and the council where needed.
The survey
The free survey is where the real price is set: room measurements, pipe and drain routes, electrical checks and the outdoor unit position, all written into your quote. A survey in County Londonderry 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 across County Londonderry:
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- Pressure test, vacuum and commissioning
- One or two units sized for the whole space
- Handover of the remote or app
- Placement clear of the hob and oven
Towns in County Londonderry
Pick your town for local details, or see every service in County Londonderry.