Air conditioning for extensions and kitchen-diners across Gwynedd
In Bangor, a side wall of a single-storey extension is usually the neatest place for the indoor unit. An extension in Bangor with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. In North Wales, an air-to-air system can be an efficient way to heat holiday homes and bungalows, with cooling as a bonus.
Prices in Gwynedd
Air conditioning for extensions and kitchen-diners in Gwynedd typically comes in at £1,345–£4,195 per space including VAT, based on North Wales rates. Labour rates in North Wales keep this slightly under the national middle. Longer or hidden pipe runs, high-level brackets and electrical upgrades are the usual reasons a quote lands at the top of the range. For reference, the Large single option in Gwynedd (one 5–7 kW unit for a large glazed space) usually comes to about £1,945–£2,695.
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
Wales removed its old 3 m boundary rule on 1 June 2026, so most houses in Gwynedd can now have an outdoor unit under permitted development if it meets the MCS 020a noise condition. Listed buildings still need consent, and conservation areas have extra restrictions.
The survey
A survey in Gwynedd 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 Gwynedd 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 Gwynedd:
- Placement clear of the hob and oven
- Hidden routes during the build, or neat surface routes after
- Free survey with glazing and roof heat-gain check
- One or two units sized for the whole space
- Pressure test, vacuum and commissioning
- Handover of the remote or app
Towns in Gwynedd
Pick your town for local details, or see every service in Gwynedd.