Air conditioning for extensions and kitchen-diners in Porthmadog
Exposed coastal sites in North Wales call for outdoor units placed out of the wind and salt spray where possible. In Porthmadog, a side wall of a single-storey extension is usually the neatest place for the indoor unit.
An extension in Porthmadog with a roof lantern or large glazed doors can overheat quickly on a sunny afternoon. We cover Porthmadog as part of Gwynedd, roughly 21 miles from Bangor, Gwynedd. Postcode districts we cover here include LL49.
Prices in Porthmadog
Our North Wales guide price for air conditioning for extensions and kitchen-diners is £1,345–£4,195 per space, VAT included. That sits a little below the UK middle, reflecting typical North Wales labour rates. Concealed pipework, access equipment for high walls and any electrical work are what push prices towards the upper figure. For reference, the Large single option in Porthmadog (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 Porthmadog 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
We book surveys in Porthmadog at a time that suits you, including early evenings by arrangement, and send the written quote afterwards. 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.
What is included
Included as standard in Porthmadog:
- Free survey with glazing and roof heat-gain check
- Hidden routes during the build, or neat surface routes after
- Pressure test, vacuum and commissioning
- Placement clear of the hob and oven
- Handover of the remote or app
Nearby
Neighbouring places we cover include Pwllheli (12 miles), Caernarfon (16 miles) and Dolgellau (16 miles). See all services in Porthmadog or air conditioning for extensions and kitchen-diners across Gwynedd.