Wall-mounted air conditioning across Cornwall
A single wall-mounted unit is often all a bedroom or sunny living room in Truro needs. In a semi or terrace in Truro, the indoor unit often goes on a back bedroom wall with the outdoor unit on a bracket below. Coastal breezes help, but inland South West towns and glazed rooms still see uncomfortable peaks.
Prices in Cornwall
Budget around £1,150–£2,950 per room including VAT for wall-mounted air conditioning in and around Cornwall. That is broadly in line with national guide prices. 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 West England figures, the Popular option (quieter mid-range unit with Wi-Fi control and better seasonal efficiency for a living room) is about £1,550–£2,150.
Essential
Reliable 2.5–3.5 kW unit for a bedroom or study, standard pipe run, basic remote.
Popular
Quieter mid-range unit with Wi-Fi control and better seasonal efficiency for a living room.
Premium
Design-led or very quiet model, larger capacity or concealed pipework through a void.
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 England, most houses can have an outdoor unit under permitted development if it is no larger than 1.5 m³, meets the MCS 020(a) noise limit of 37 dB(A) at the nearest neighbour's window, and there are no more than two on a detached house or one on other houses. Listed buildings need consent.
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. On a survey in Cornwall the engineer looks at room size, glazing, the route for pipes and drains, the electrics and where the outdoor unit can sit quietly, then the written quote follows.
What is included
Included with wall-mounted air conditioning across Cornwall:
- Core-drilled wall penetration and sealed sleeve
- Handover of the remote, Wi-Fi app (where fitted) and filter cleaning
- Nitrogen pressure test and deep vacuum before commissioning
- Free site survey and room heat-gain check
- Supply of an R32 inverter unit sized to the room
- Insulated copper pipework, drain and interconnecting cable
Towns in Cornwall
Pick your town for local details, or see every service in Cornwall.