Air Conditioning · Updated August 2026
Ducted Air Conditioning Cost UK 2026
Ducted systems hide the indoor unit in a loft or ceiling void and feed rooms through grilles, so nothing is visible but the vents. Expect £6,000–£15,000 for a floor, and £8,000–£20,000 for whole-house VRF.
Ducted and whole-house cost — 2026
Ducted work is far cheaper alongside a renovation, when the void and routes are already open.
| System | Installed cost | Coverage | Install time | Best for |
|---|---|---|---|---|
| Ducted / concealed system | £6,000–15,000 | Whole floor | 3–7 days | New builds, renovations, hidden install |
| VRF / VRV (whole house) | £8,000–20,000 | Whole house | 5–10 days | Large homes, independent room-by-room control |
| Retrofit into a finished house | +20–40% | As above | +2–4 days | Lifting floors and making good afterwards |
Source: Best Builders 2026 quote data across 519 UK towns.
What changes the cost
| Cost factor | Typical impact | Why it matters |
|---|---|---|
| Pipe run length | +£150–400 | Runs over ~5m need extra refrigerant pipe, insulation and labour; long vertical runs in flats cost most |
| Condenser siting & access | +£100–600 | Ground level next to the room is cheapest; roof, height or scaffold access adds cost |
| Number of indoor units | +£700–1,500 each | Each extra head adds unit, pipework and commissioning time |
| Electrical work | +£150–500 | A dedicated spur, consumer-unit way or isolator may be needed |
| Capacity (kW / BTU) | +£200–1,200 | Oversizing wastes money up front and on running cost |
| Brand & range | +£400–800 | Premium Daikin/Mitsubishi designer ranges vs value Samsung/LG |
| Making good | +£0–300 | Trunking, core-drilling, plaster patching or repainting around the route |
Air conditioning cost by UK region — 2026
Labour rates and access drive most of the regional spread. Figures below are for a single-room split; the same percentages apply across the other system types.
| Region | Single-room split (installed) | vs UK average |
|---|---|---|
| London | £1,900–3,600 | +25–30% |
| South East | £1,750–3,300 | +15–25% |
| South West & East | £1,550–3,000 | +5–10% |
| Midlands | £1,450–2,800 | Baseline |
| North of England | £1,400–2,700 | −5% |
| Wales & Scotland | £1,400–2,750 | −5% to baseline |
Getting it priced properly
1. Size it first
Capacity comes from room size, glazing and aspect — not from guesswork. An installer who quotes without asking about the room is guessing.
2. Check F-Gas registration
Anything touching the refrigerant circuit legally requires an F-Gas registered engineer. Ask to see it and check it on the register.
3. Compare like for like
Get three itemised quotes covering the same capacity, brand tier and pipe run, so you are comparing the job and not the wording.
Ducted / concealed — frequently asked questions
It can, but it is the expensive way to do it. Running ducts through a finished house means lifting floors or dropping ceilings and making good afterwards, which is why retrofit adds 20–40% over the same system fitted during a renovation.
A concealed indoor unit typically needs 300–400mm of clear void plus access for servicing. Where the loft is a room or the void is shallow, a multi-split is usually the better answer.
At the room, yes — the fan and compressor are both away from the living space, and only air movement at the grille is audible. The plant itself is not quieter, it is just further away.
Larger ducted and VRF systems usually need a dedicated circuit and sometimes a consumer-unit way. Budget £150–500 for electrical work on top of the system price.
Related air conditioning guides
Every system type priced side by side.
What it costs per hour and per summer.
When an external unit needs consent.
Reviewed by the BestBuilders editorial team on 9 August 2026 · Next scheduled review: November 2026 · See our editorial standards.