Air conditioning for extensions and kitchen-diners in Belfast
An extension in Belfast with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Damp Northern Ireland winters make a heat pump's dehumidifying mode useful well beyond the summer.
In Belfast, a side wall of a single-storey extension is usually the neatest place for the indoor unit. As well as Belfast itself, our County Antrim coverage takes in Lisburn, Newtownabbey and the towns around them. Postcode districts we cover here include BT1, BT2, BT3, BT7, BT9 and 3 more.
Prices in Belfast
For Belfast, expect roughly £1,345 to £4,095 per space, VAT included, adjusted for typical Northern Ireland rates. That sits a little below the UK middle, reflecting typical Northern Ireland labour rates. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. Typical Large single work (one 5–7 kW unit for a large glazed space) lands around £1,895–£2,595 in this area.
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
In Northern Ireland we confirm planning requirements for the outdoor unit on survey, especially for listed buildings and conservation areas.
The survey
Surveys in Belfast cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. A survey in Belfast 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 Belfast covers:
- Hidden routes during the build, or neat surface routes after
- Handover of the remote or app
- Placement clear of the hob and oven
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
Nearby
Close to Belfast, our coverage also includes Castlereagh (2 miles), Newtownabbey (4 miles) and Holywood (5 miles). See all services in Belfast or air conditioning for extensions and kitchen-diners across County Antrim.