How much does home air conditioning cost in the UK?

Fitted prices vary by how many rooms you’re cooling and how tricky the install is. Here’s a realistic 2026 guide.

Typical installed costs

System	Fitted cost
Single-room split	£1,500–3,000
Multi-split (3–4 rooms)	£3,500–7,000
Ducted / whole-home	£6,000–20,000
Portable (no install)	£200–500

What drives the price

The unit itself is only part of it. The bigger variables are how far the indoor units sit from the outdoor condenser (longer pipe runs cost more), how easy access is, and whether your electrics can take the extra load. Older homes sometimes need a new consumer unit or an EICR first — worth factoring in (here’s how to tell where you stand).

Don’t forget running cost

A modern split system is efficient (a reversible heat pump with a SCOP of ~3.5–5), but cooling all summer still adds up. This is exactly why many people pair AC with solar and a battery to run it on their own power.

Getting an accurate figure

The only way to know your real cost is a free site survey. Tell us your home and postcode and we’ll match you with the right vetted local installer for a no-obligation quote.