How much does a home sauna cost in the UK?

A home sauna in the UK costs roughly £1,500–£5,000 for an infrared cabin, £2,500–£7,000 for an indoor traditional kit, £4,000–£9,000 for an outdoor barrel, £7,000–£20,000 for an insulated outdoor cabin and £20,000–£60,000 or more for a bespoke build. Those figures are for the sauna itself. On an outdoor installation you should expect a further £1,500–£6,000 for the base, electrical supply, delivery and assembly.

All figures on this page are indicative UK prices for 2026 and include VAT unless stated. The number that matters is your number, not a range — our sauna cost calculator builds one from your size, format, access and cable run in about two minutes.

Price bands, and what is actually in them

Type	Typical UK price	What that normally includes
Infrared cabin	£1,500–£5,000	1–3 person cabin, panels, controller, plugs into a 13 A socket. No base, no electrical work
Indoor traditional kit	£2,500–£7,000	Pre-cut panels, insulation, cladding, benches, door, heater and stones. Self-assembly, no electrical work
Outdoor barrel	£4,000–£9,000	Assembled or stave-built shell, benches, heater, stones, flue if wood-fired. Kerbside delivery
Outdoor insulated cabin	£7,000–£20,000	Insulated panel construction, vapour barrier, cladding, glass, benches, heater, roofing. Often a delivered-and-assembled price
Bespoke / architect-designed	£20,000–£60,000+	Designed to the space, structural and services coordination, premium timbers, large glazing, often part of a wider suite

Two things to notice. First, the bands overlap heavily — a very good barrel beats a poor cabin. Second, the further down the table you go, the more of the total is labour and coordination rather than materials.

Whether infrared belongs on your shortlist at all is a different question to price: it heats your body rather than the room, tops out well below traditional temperatures, and does not produce steam. The infrared vs traditional sauna comparison sets out where each one makes sense, and barrel vs cabin covers the outdoor formats.

The costs people forget

This is where a £7,000 cabin becomes an £11,000 project. None of these are optional extras invented by installers; they are what it takes to make a sauna work.

Item	Indicative UK cost	Notes
Base / groundworks	£300–£3,500	Slab base on compacted hardcore at the low end; ground screws £800–£2,500; reinforced concrete pad £1,200–£3,500
Electrical supply	£400–£2,500	Dedicated circuit, armoured cable, trenching, isolator. Cost scales with distance and with what you dig through
Consumer unit upgrade	£500–£1,200	Only if the existing board has no spare way or is not up to current standards
Delivery	£150–£600	Kerbside. Delivery to position is a different price
Craning / hiab	£400–£1,200	Half-day hire. Add £100–£400 for permits or traffic management
Assembly labour	£400–£2,000	Barrel at the low end, panel cabin at the high end. Bespoke builds run to £4,000–£15,000+
Heater and stones	£400–£2,500	6–9 kW electric £400–£1,500; premium brands and wood-fired stoves higher; stones £40–£120
Flue kit (wood-fired)	£400–£1,000	Twin-wall insulated flue, roof flashing, spark arrestor
Glass	£300–£5,000	Toughened glass door £300–£900; full panoramic front £1,500–£5,000
Planning application	£0–£350	Almost always £0 under permitted development. A lawful development certificate is a useful, cheaper alternative
VAT	20%	Check whether the price you are comparing is inclusive

The two that surprise people most are the electrical supply and access. A sauna at the end of a 30 m garden, with the cable crossing a block-paved drive, can cost more to connect than the heater cost to buy. And if the cabin will not come through the side gate, a hiab lift is a four-figure line item that nobody mentioned at the point of sale. Both are decided by where you put the building — see where to put a garden sauna and run your plot through the fit checker before you commit.

What actually drives the price

Insulation and construction. The single biggest divider in outdoor saunas. A barrel is usually solid timber staves with no insulation layer; an insulated cabin has a framed wall with mineral wool, a foil vapour barrier, a ventilated cavity and cladding. That construction costs more up front and costs less to run every session for the next fifteen years, which matters in a UK winter. See sauna running costs for the arithmetic.

Size. Not linearly. Going from a 2-person to a 4-person cabin adds materials, but it also pushes you into a bigger heater, a heavier base and often a bigger electrical circuit. See sauna sizes and occupancy.

Timber. Nordic spruce is the volume material. Thermowood, western red cedar, alder and aspen each add cost — cedar and aspen benches on a mid-size cabin can be a four-figure difference on their own.

Glass. Toughened glass for a sauna is specialist, and large panes need structural framing and careful handling. A panoramic front is often the largest single upgrade on an outdoor cabin.

Heater. The spread between a functional 6 kW element heater and a premium or wood-fired unit is easily £1,500. Wood-fired also brings a flue, a hearth and combustion-appliance requirements.

Roof, finish and location. EPDM or shingle roofing, guttering, a covered porch and external staining are all real costs on an outdoor building — and labour rates in London and the South East run materially above the rest of the UK, with surcharges on remote deliveries.

What a suspiciously cheap quote is leaving out

A £3,000 “outdoor sauna” is not necessarily a scam. It is usually a shell price. The things that are missing, in rough order of how often they are missing:

1. The base. You are quoted for a building, not for anything to stand it on.
2. The electrics. A dedicated circuit and its certification is not in the box.
3. Delivery to position. Kerbside means a pallet on the pavement and your problem after that.
4. Assembly. “Easy self-build” cabins routinely take two people two to four days.
5. Insulation. Or a nominal 25 mm where 50–100 mm is appropriate for UK year-round use.
6. The vapour barrier. Omitting the foil barrier, or substituting polythene, is the single most common defect in cheap and DIY builds, and it rots the wall from the inside.
7. Heater capacity. A 4.5 kW heater in a cabin that needs 8 kW never gets properly hot.
8. VAT. A trade or import listing quoted ex-VAT looks a fifth cheaper than it is.
9. Warranty and support. A drop-shipped cabin with no UK entity behind it has no meaningful warranty.

None of that makes the cheap option wrong. If you already have a slab, an electrician in the family and a free weekend, a shell price is genuinely a shell price. It only becomes a problem when it is compared against an installed quote as if the two are the same thing.

How to compare three quotes like for like

Ask every supplier to price the same specification, and to itemise it. A one-page comparison beats an hour of phone calls.

• Cabin footprint and internal height, and how many people each bench level seats.
• Wall construction: insulation type and thickness, vapour barrier material, cavity, cladding species and thickness.
• Heater: make, model, kW rating, and how many kilograms of stone are included.
• Glass: door only or door plus panels; total glazed area.
• Base: included or excluded, and to what specification.
• Electrical: is the dedicated circuit, isolator and Part P certification in the price, or is it “customer to arrange”? See home sauna electrical requirements.
• Ventilation: are inlet and outlet vents specified and positioned, or left to chance?
• Delivery and assembly: kerbside or to position, hiab included or provisional, days and crew.
• Warranty, VAT and payment terms: length and scope, inclusive or exclusive, deposit and stage payments.

If one quote is dramatically cheaper after all that, you have found either a genuinely leaner supplier or an omission you can now name. Our sauna installation page goes through what a proper installed scope contains, stage by stage.

Running costs, briefly

The purchase price gets the attention; the running cost decides whether you use it. A 6 kW heater consumes roughly 6 kWh in the heat-up hour and around 3 kWh in a second hour of cycling — about 9 kWh per two-hour session. At typical 2026 UK domestic rates that is £2.00–£2.50 a session, or roughly £200–£260 a year at twice a week. An uninsulated barrel in January runs meaningfully above that; a well-sealed insulated cabin below. Sauna running costs breaks it down by heater size, insulation and usage. Add a modest allowance for maintenance: external staining every two to three years, bench cleaning, and stone replacement every few years as they crack.

So is it worth it?

That depends entirely on how often you will use it, which turns far more on siting and convenience than on specification. A £5,000 barrel ten metres from the back door beats a £15,000 cabin at the end of the garden if the £15,000 one requires a decision every time.

Are home saunas worth it? takes the value question directly. If you already know roughly what you want, put your dimensions, access and cable run into the sauna cost calculator for a figure with the forgotten items already in it — or start from the sauna hub if you are still choosing a format.