Best outdoor sauna
Polar Recovery Sauna Cube
9.4 out of 10
45mm thermowood with a 6kW Harvia heater in the box, seating 3–5. The strongest price per person in the outdoor market.
£4,999.99
The best saunas in the UK, ranked.
Outdoor cabins, indoor kits, infrared and the luxury tier, scored out of 10 with prices read from live listings. Start with the category winners.
See the top picks- Four categories, one winner each
- Prices checked at publish
- Every pick links straight to the seller
The top picks
Three winners from the four rankings, for the three ways people actually buy: garden, spare room, and money-no-object.
Best indoor sauna
Harvia Variant S
9.1 out of 10
A true 100°C Finnish cabin on a 1.15m square footprint, from the world's biggest sauna heater maker. Heater bought separately.
£3,577.45
Best luxury sauna
Out of the Valley
9.5 out of 10
Commissioned per site and built by hand in a Devon workshop. The top of the market, bought like architecture.
On enquiry
Every ranking
Four categories cover the whole market; each one carries the full list, a side-by-side table and the buying detail for that type.
How to choose
Traditional or infrared
Traditional cabins heat air to 80–100°C and give you steam off the stones; infrared heats the body directly at 30–65°C, plugs into a normal socket and costs about 42p a session atOfgem's current cap rate. Neither substitutes for the other: buy traditional for the hit and the ritual, infrared for nightly frequency and zero installation, as ourcomparison of the two heatssets out.
The electricity question
Every traditional electric heater on this site hard-wires to a dedicated 16A–32A circuit, which is notifiable work underPart P of the Building Regulations, so a registered electrician is part of the budget. That single fact sorts most buyers: if the circuit is fine, start with theoutdoor or indoor rankings; if it is not, infrared or wood-fired are the two routes that skip it, andthe certified circuit a traditional heater needsadds £300 to £800 before the cabin is switched on.
Outdoor practicalities
A garden cabin needs a level load-bearing base, kerbside access for a tail-lift delivery, and in England, under 2.5m of height if it stands within 2m of a boundary under thePlanning Portal's outbuilding rules. The 2.1m-tall cabins that top the outdoor list are shaped by exactly that limit, and thecases where permitted development stops applyingare worth checking before you order.
Sizing honestly
A "2 person" cabin is a couple sitting up; lying down is a 3–5 person interior, which is why the two-metre-square Sauna Cube is the default family buy while the 1.15m indoor shells suit couples. Count how people will actually sit before choosing a tier, and if the shortlist is still long, work throughthe six decisions that narrow it.
The five types of sauna, explained
Almost every sauna sold in the UK is one of five things, and the differences that matter are heat, installation and price rather than brand. This is the whole market in one table.
| Type | Heat | Electrics | UK entry price | Best for |
|---|---|---|---|---|
| Outdoor cabin | 80-100°C | Dedicated circuit | £1,850 shell, £4,999 complete | Capacity and lying down |
| Barrel | 80-100°C | Circuit or wood flue | £4,200 | Narrow gardens, fast heat-up |
| Indoor cabin | 80-100°C | Dedicated circuit | £3,577 shell | Real heat without the garden |
| Infrared cabin | 30-65°C | Standard socket | £1,500 | Nightly use, low running cost |
| Infrared blanket | 25-75°C on skin | Standard socket | £399 | No floor space at all |
Traditional cabins
A traditional sauna is a heated room. An element warms a pile of stones, the stones warm the air, and you sit in 80°C to 100°C. Throwing water on the stones flashes it to steam, which is löyly, and it is the part infrared cannot reproduce. Sessions run in short rounds of 10 to 20 minutes with a cool-down between them.
Infrared cabins and blankets
Infrared skips the air entirely. Panels emit radiation your skin absorbs directly, so you warm up while the room stays at a temperature you could hold a conversation in. That is why an infrared session runs 30 to 45 minutes, why it plugs into a normal socket, and why it costs roughly a quarter as much to run.
What a home sauna costs in the UK
The list price is the start of the number, not the end of it. These are the additions that turn a £4,999 cabin into a £7,000 project, and every one of them is predictable before you order.
| Cost | Typical | Applies to |
|---|---|---|
| Heater, if not included | £600-£900 | Most shells and self-build kits |
| Dedicated circuit | £300-£800 | Every traditional sauna |
| Base or foundation | £400-£1,500 | Outdoor cabins |
| Professional assembly | £1,200-£2,000 | Outdoor cabins, optional |
| Wood treatment | £40-£80 a year | Outdoor cabins, often a warranty condition |
| Running cost, 3 sessions a week | £66-£245 a year | Infrared to 6kW traditional |
Running cost is where the two heat types separate hardest. A 6kW traditional session costs about £1.57 and a 1600W infrared session about 42p, so a household using a sauna three times a week pays about £245 a year against £66. Over a decade that gap is larger than the price difference between the cabins, which is set out in full in our breakdown ofwhat a sauna costs to run.
Installation, and the one job you cannot do yourself
You can assemble a kit yourself, and self-build shells are the cheapest route into a real sauna. The electrical connection is different. Every traditional heater hard-wires to a dedicated 16A to 32A circuit run from the consumer unit, and that circuit has to be installed and certified by an electrician registered with a competent person scheme.
What you should receive at the end is an Electrical Installation Certificate and a Building Regulations compliance notice. Keep both: they are what a home insurer and a buyer's solicitor ask for, and reproducing them years later means paying for a fresh inspection. Infrared cabins and blankets sidestep the whole requirement by running off a standard 13A socket.
Outdoors adds a base and a cable run. A 3-5 person cabin weighs about 600kg empty, so it needs a concrete slab, paving on a proper sub-base or a reinforced deck, laid and cured before delivery day. The power usually arrives as armoured cable in a trench, and digging that trench yourself is the single biggest saving available on the job.
What the research actually says
The evidence people cite for sauna use comes overwhelmingly from Finland, where a2015 cohort study published in JAMA Internal Medicinefollowed 2,315 middle-aged men for over 20 years and found frequent sauna bathing associated with lower cardiovascular mortality.
Two caveats are worth stating plainly. That is an association in an observational study rather than a controlled trial, and it studied hot traditional saunas used several times a week, so it does not transfer automatically to a 60°C infrared cabin. Buy either type because you want the heat, and treat the literature as a reason to be unworried rather than a reason to buy.
How we rank
Each category is scored out of 10 against the criteria printed at the top of its page, and rank order weighs value alongside the raw score, so a specialist entry can carry a higher score than the pick above it. Prices are read from retailer and manufacturer listings at publish time and quoted as listed, in pounds. Where a maker prices per project rather than publishing a figure, the entry says on enquiry instead of guessing.
The winners, side by side
Common questions
How much does a home sauna cost in the UK?
Self-build outdoor shells start at £1,850 without a heater. Complete cabins run £2,599.99 to £4,999.99 across the infrared, indoor and outdoor winners here, and the luxury tier starts around £8,500 for a big panel-built cabin before bespoke commissions take over.
How much does a sauna cost to run?
A 6kW traditional heater uses about 6 units per heat-up and session, roughly £1.57 at the July 2026 cap rate of 26.11p a unit. A 1600W infrared cabin uses about 1.6 units, roughly 42p. Nightly users feel that difference; weekend users won't.
Do I need planning permission for a sauna?
Indoors, no. In the garden, usually not in England: under permitted development a single-storey garden building within 2m of a boundary can stand up to 2.5m tall, which purpose-built cabins are designed to duck under. The full detail sits in the outdoor rankings' FAQ.
Do I need an electrician?
For a traditional cabin, yes: the heaters hard-wire to a dedicated 16A–32A circuit. Plug-in infrared cabins need nothing beyond a standard socket, and wood-fired outdoor stoves need a flue rather than wiring.
Infrared or traditional?
Traditional heats air to 80–100°C with steam off the stones; infrared heats you directly at 30–65°C, runs off a socket and costs a third as much per session. Pick by how you want the heat, then use the matching rankings above.
What size sauna do I need?
Allow about 60cm of bench per seated adult. A cabin sold as two person seats two upright with no room to lie down; lying down needs a bench around 1.8m, which is a three to five person cabin.
Is the heater included when you buy a sauna?
Often not. Indoor cabins and self-build kits are usually sold as shells so the heater can be sized to the cabin volume, adding £600 to £900. Some complete outdoor cabins do include one, which is worth checking before comparing prices.
How long does a sauna take to heat up?
Ten to fifteen minutes for a small indoor cabin, thirty to forty for an outdoor one, and forty-five to sixty for a wood-fired stove that also needs tending. Infrared cabins are ready in ten to fifteen.
How long should you stay in a sauna?
Ten to twenty minutes per round in a traditional sauna, with a cool-down between rounds. Infrared sessions run thirty to forty-five minutes because the air temperature is far lower. Get out whenever you stop feeling comfortable.
Can I install a sauna myself?
You can assemble a kit yourself, and self-build shells are the cheapest route into a real sauna. The electrical connection for a traditional heater cannot be self-certified, so that part needs a registered electrician.
What is the best sauna brand in the UK?
No single brand wins every category. Harvia dominates heaters and indoor kits, Polar Recovery leads on complete outdoor and infrared cabins for the money, and the bespoke tier belongs to British workshops like Out of the Valley.