Air Conditioning Installation
Cost Guide UK 2026
Everything you need to know about the cost of installing air conditioning in the UK — from a single bedroom unit to a whole-home system. Real prices, no fluff.
Cost by System Type
The biggest factor in what you’ll pay is which type of system you choose. Here’s what each one costs to buy and install in 2026, based on real quotes from UK installers.
All prices include VAT and are based on 2026 UK market rates. London and South East installations typically run 15–25% higher than the national average due to higher labour costs.
What Affects the Price
Two identical systems can cost very different amounts depending on your property. Here’s what moves the needle most.
London and the South East command a 15–25% premium on labour. Manchester, Birmingham, and Bristol are closer to the national average.
Every metre of pipe run between the indoor and outdoor unit adds cost. A straightforward back-to-back install is cheapest. Long runs through multiple walls add £100–£300.
Solid brick or concrete takes longer to drill than timber frame or plasterboard. Older Victorian properties with thick walls can add £50–£150 to the job.
Older properties may need a dedicated circuit added to the consumer unit. Budget an extra £200–£500 if your property is pre-1990s and hasn’t had recent rewiring.
Daikin and Mitsubishi Electric command a premium but are widely regarded as the most reliable. Budget brands cost less upfront but may cost more in servicing. Larger BTU units for bigger rooms cost more.
Roof mounting or scaffold access for the outdoor unit can add £200–£600. Ground-level wall mounting is always cheapest.
Cost by Region
Based on a standard single-room split system installation (supply and fit).
Running Costs
Based on Ofgem’s average electricity rate of 24.67p per kWh (April–June 2026). Actual costs vary with usage patterns and energy tariff.
Choosing an Installer
The unit is only half the job. A poor installation costs more in the long run. Here’s what every installer you consider must have.
Frequently Asked Questions
In most cases, no. Installing a split system on a standard UK house falls under Permitted Development rights. However, you’ll likely need planning permission if your property is in a Conservation Area, is listed, or if the outdoor unit will be visible from a public road. Always check with your local council before ordering equipment.
A single-room split system typically takes 4–8 hours — one working day. Multi-room systems take 1–3 days depending on the number of units and complexity of the pipework.
A fixed split system requires freeholder or landlord consent in writing, as it involves drilling through external walls. If you can’t get consent or would rather not ask, a portable air conditioner is the practical alternative — no installation required, no permission needed, and fully removable when you move.
Modern split-system air conditioners work as heat pumps — they can both cool in summer and heat in winter. This makes them genuinely useful year-round in the UK, not just a seasonal purchase. If you’re considering replacing your boiler, a combined air source heat pump system is worth exploring alongside standard air conditioning.
Get at least three quotes from different installers. Prices for identical jobs can vary by 30–40% depending on the installer. Be wary of quotes significantly lower than the others — this often means cheaper equipment, less experienced engineers, or hidden costs added later.
We work with vetted, F-Gas certified installers across the UK. Tell us what you need and we’ll send you up to 3 quotes — free, no obligation.
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