Air Conditioning

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.

£6,000–£15,000 installedWhole floor3–7 days on site

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The numbers

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: BestBuilders’ 2026 regional cost model (national cost guides × regional labour index), averaged across 519 UK towns.

What moves the price

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

By region

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, from a single-room split to a multi-split system.

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

How it works

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.

Visual guide

Ducted / concealed costs compared

Where this job sits against the other air conditioning jobs, on 2026 UK prices. Your own quote depends on size, access and spec.

Source: BestBuilders 2026 pricing across 7 air conditioning jobs. The highlighted bar is this page.

Common questions

Ducted / concealed — frequently asked questions

Can ducted AC be retrofitted?

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. The cheapest window by far is while you already have the loft boarded out, a ceiling down or floors up for other work; folding the ductwork into a renovation you are doing anyway can roughly halve the effective cost of the system.

How much loft space does it need?

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. It is worth having the installer confirm the void depth and a clear run for the ducts before you commit, because a system designed around a void that turns out to be too shallow is the most common reason a ducted quote balloons on the day.

Is ducted quieter than a split?

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. That is also why grille placement matters: keep the return-air grille away from bedrooms and the airflow you notice at night drops considerably, even though the plant is doing the same work.

Does it need its own electrical supply?

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. On a whole-house VRF it is worth checking the incoming supply has the headroom before design starts, as an older single-phase board occasionally needs upgrading and that is a cost best known up front rather than mid-install.

Keep reading

Air conditioning cost 2026

Every system type priced side by side.

Running costs

What it costs per hour and per summer.

Planning permission

When an external unit needs consent.

Go deeper

Ducted / concealed — guides and detail

The detail behind the number: what changes the price, the planning position, and how to check a quote before you accept it.

Ducted AC cost calculatorPrice a concealed or whole-house system.See costs & get quotes →

Registered members: Air Conditioning

7 businesses offering air conditioning have a public profile with BestBuilders. Each listing is a business that registered with us directly; the details shown are the ones it declared at registration, and a Companies House number appears only where one was given.