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Air Conditioning Cost Calculator UK
Estimate the 2026 cost of installing air conditioning in your home — by system type and region. Instant result, no email needed.
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Pick your system and region for an instant 2026 fitted-price estimate from REFCOM-certified installers.
2026 Price Guide
Air conditioning prices, 2026
| System | Typical 2026 cost |
|---|---|
| Single-room wall split (2.5–3.5kW) | £1,500 – £3,000 |
| Multi-split, 3–4 rooms | £3,500 – £7,000 |
| Ducted / whole-home (VRF) | £6,000 – £15,000 |
All installs must be carried out by an F-Gas registered engineer by law. Full detail in the air conditioning cost guide.
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FAQs · 2026
Air Conditioning cost questions
A single-room wall-mounted split system typically costs £1,500–£3,000 fitted in 2026, a multi-split covering 3–4 rooms £3,500–£7,000, and a ducted whole-home system £6,000–£15,000. London and the South East run 10–25% higher.
Yes — these are supply-and-fit estimates including the indoor unit(s), outdoor condenser, standard pipe run and commissioning by an F-Gas registered engineer.
Yes. Modern split systems are air-to-air heat pumps that cool in summer and heat in winter, far more efficiently than plug-in electric heaters.
Most domestic AC is permitted development, but the external unit has size and siting conditions, and flats / listed buildings / conservation areas often need permission. Your installer will advise.
Handling refrigerant is legally restricted to F-Gas certified (REFCOM-registered) engineers. It protects your warranty and ensures a safe, compliant install.
Last reviewed June 2026. AC prices reflect 2026 supply-and-fit quotes by F-Gas / REFCOM installers across UK regions. This calculator gives a budgeting estimate, not a quote. Editorial standards: /editorial-standards. See all free calculators or the cost guide hub.