Air Conditioning

Portable Air Conditioning Cost UK 2026

A portable unit needs no installation and no installer — you buy it, wheel it in and vent the hose out of a window. That buys convenience at £200–£500, but it is the most expensive way to cool a room hour for hour.

£200–£500 to buyNo installRuns at 27–40p/hr

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The numbers

Portable vs fitted — 2026

The purchase price is the whole story for a portable; for a split, running cost is.

Option	Up-front	Running (per summer)	Rooms	Notes
Portable unit	£200–500	£90–160	1 (partial)	Draws 1.0–1.5kW near-continuously; hose must vent out
2.5kW fitted split	£1,500–2,600	£30–70	1	Quieter, cools properly, heats in winter
Difference	−£1,300–2,100 up front	+£60–90 every summer	—	A split repays the gap over roughly 15–25 summers on running cost alone

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

Because a portable draws close to its full 1.0–1.5kW whenever the compressor is running, the low purchase price is deceptive: across three or four summers the electricity alone can rival what a fitted unit would have cost to install in the first place. That is why anyone cooling the same room every year usually graduates to a wall-mounted system — see our split air conditioning cost guide for the fitted alternative, and weigh whether cooling earns its keep in your home with our is air conditioning worth it analysis before you commit.

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.

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

Portable units 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

Portable units — frequently asked questions

Are portable air conditioners any good?

For occasional or emergency cooling, in a rented flat, or where no external unit is allowed, they are the only realistic option. For a room you will cool every summer for years, a fitted split is quieter, cools better and costs far less to run.

Why do portables cost so much to run?

A portable draws close to its full 1.0–1.5kW most of the time and vents warm air through a hose that also lets warm air back in around the window seal. A fitted split modulates down to 0.3–0.7kW once the room is at temperature.

Do I need a landlord’s permission?

For a portable, normally not — nothing is fixed and nothing is drilled. For anything with an external condenser you will need the landlord’s consent, and in a flat usually the freeholder’s too.

Can a portable heat as well?

Some do, but poorly and expensively. If you want heating and cooling from one box, a reversible split is the system that actually does it.

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

Portable units — 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.

Portable vs fitted calculatorSee when a portable stops being the cheaper option.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.