Air conditioning for extensions and kitchen-diners in Llantwit Major
Wet South Wales winters make a heat pump's quiet, even heating and dehumidifying mode useful well beyond summer. In Llantwit Major, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
An extension in Llantwit Major with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. Llantwit Major sits around 14 miles from Cardiff, inside our South Glamorgan area. That includes the CF61 postcode district.
Prices in Llantwit Major
Air conditioning for extensions and kitchen-diners in Llantwit Major typically comes in at £1,345–£4,095 per space including VAT, based on South and Mid Wales rates. Labour rates in South and Mid Wales keep this slightly under the national middle. Quotes move with the length of the pipe run, where the outdoor unit can sit and how much electrical work the job needs. On our South and Mid Wales figures, the Large single option (one 5–7 kW unit for a large glazed space) is 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
Wales removed its old 3 m boundary rule on 1 June 2026, so most houses in Llantwit Major 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
Surveys in Llantwit Major cover heat gain, pipe routes, electrics, access and noise to the nearest neighbour, so surprises on the day are rare. At the survey we look at how each room is used, where the sun hits it and how the pipes can reach the outside wall, then put it all in a written quote.
What is included
Included as standard in Llantwit Major:
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- Handover of the remote or app
- Placement clear of the hob and oven
- Free survey with glazing and roof heat-gain check
Nearby
Close to Llantwit Major, our coverage also includes Cowbridge (4 miles), Bridgend (8 miles) and Barry (9 miles). See all services in Llantwit Major or air conditioning for extensions and kitchen-diners across South Glamorgan.