How much does an outdoor sauna cost in the UK in 2026? What drives the price

What drives the cost: size, seating and shape

The honest way to think about outdoor sauna cost in the UK is by shape and seating, because those two things drive the price more than any finish or brand story. A bigger cabin needs more thermowood, longer benches and a larger heater, and the shape of the cabin decides how much material and how much glass go into it. Across the SAUNARI outdoor range the barrel is the lowest entry point, the cubes and the compact glass-front model sit in the middle, and the large panoramic cabins are the flagships. Four examples show how the range is structured:

• Barrel sauna, 2–4 people (U130): the lowest entry point in the outdoor range. A compact round cabin with a magnesium-finished interior.
• Cube sauna, 3–4 people (G160): a step up in structure, with straight walls, a minimalist silhouette and no foundation required on a level hardened surface.
• Glass-front sauna, 1–2 people (P130): curved panoramic glazing on a small footprint; the shop lists it as its most popular model.
• Panoramic sauna, 6–8 people (P1): the most seating behind glass, with a fully glazed front wall, insulated double glazing and multi-level benches.

Glass, heater and extras: the other price drivers

After size and shape, glazing is the next big factor. A solid-walled barrel or cube uses mostly timber, while a panoramic front or a curved glass wall adds tempered or insulated glass and the fittings that hold it, which is why glass-fronted models sit higher in any range than solid cabins of similar capacity. The heater and its control come next: a larger cabin needs more heater output, and a more comfortable control option adds to the set. Finally, extras such as an outdoor shower, a changing porch or additional interior lighting each add a line of their own.

None of these is a reason to avoid a particular model; they simply explain why two saunas seating the same number of people can be priced quite differently. When you compare, match like with like: the same seating, the same type of glass and the same heater set. Then see the current price on the product page in the SAUNARI shop for each model you are weighing up.

What a SAUNARI set actually includes

A price on its own means little until you know what is missing from it, and this is where much of the confusion in 'outdoor sauna for sale' listings comes from. Some advertise a shell and sell the heater as an upgrade; others quote a figure that quietly excludes benches or stones. A SAUNARI price covers the complete sauna set as described on each product page, and for the four models above that means the cabin built from thermowood elements, a Harvia electric heater, sauna stones and benches, plus assembly instructions.

There are small differences between models, which is why the product page always wins over a summary. The U130 barrel adds interior lighting, gravity ventilation and its magnesium-finished interior; the G160 cube ships with backrests as well as benches; the P130 has interior lighting, tempered glass and stainless-steel fittings; the P1 lists interior lighting and a complete assembly manual with its multi-level benches. What none of the sets include is the base the sauna stands on, the electrical connection, or a fitter to assemble it. Those are the three items to add before you compare a SAUNARI set with anyone else's.

Value per seat: what you get in the set

Rather than looking at the headline figure alone, ask what each set gives you for the number of people who will actually use it. Seating, glazing and what comes in the crate together decide the value of a set, and the picture changes a great deal once you look at them side by side.

Two things stand out in the list below. First, the largest of the four is not automatically the least sensible choice: glazing and structure do not grow in step with bench length, so a big panoramic cabin shares its glass and frame among many more people. Second, the P130 is the smallest cabin yet is listed as the most popular model, which suggests buyers are choosing the view and the small footprint rather than capacity. A couple who use a sauna most evenings will get more from a two-seater they heat quickly than from six seats that stay empty, while a family that hosts should look hard at the larger barrels and cubes.

• U130 barrel, up to 4 people: the lowest entry point, with heater, stones, benches, interior lighting and gravity ventilation in the set.
• G160 cube, up to 4 people: straight-walled cabin with benches and backrests, and no foundation required on a level hardened surface.
• P1 panoramic, up to 8 people: the most seating in the set, with a fully glazed front, insulated double glazing and multi-level benches.
• P130 glass-front, up to 2 people: the most view for its size, with tempered curved glass, interior lighting and stainless-steel fittings.

The base: the cost most people forget to plan

Every outdoor sauna needs to stand on something level and firm, and that something is not in the crate. What it costs depends entirely on what is already in your garden. If you have an existing patio, paved terrace or a sound concrete pad in the right spot, the base may cost nothing at all; the G160 in particular is designed to sit on a level, hardened surface without a poured foundation. If you are starting from lawn or soil, plan for either a compacted hardcore and paving-slab base or a concrete slab, priced by a local landscaper or groundworker against the footprint of your chosen model.

A few points of general guidance. Get the base finished and cured before the delivery date, not after, because a barrel or cube that arrives with nowhere to stand is an awkward thing to store. Allow a margin around the cabin footprint for access and for the door swing. Check the level with a straight edge rather than by eye; a cabin built from thermowood elements goes together far more easily on a truly flat surface. And confirm the exact footprint and any base recommendation for your chosen model with SAUNARI before the groundwork starts, rather than working from a catalogue drawing.

Electrician, delivery and the assembly option

The Harvia heater is an electrical appliance and connecting it should be left to a qualified electrician, ideally one registered with a UK competent-person scheme so the work is certified. The cost has two parts: the run of cable from your consumer unit to the sauna, which is driven by distance and whether it goes underground, and the connection itself. Ask SAUNARI for the heater's electrical requirements for your model, give those figures to the electrician before you order and ask for a written quote, because a long run across a large garden can cost more than a short one against the house wall.

Delivery is a separate line and depends on postcode and access, so confirm it for your address with SAUNARI or on the product page before you order. On the day, the elements still have to be carried from the delivery vehicle to the base, and a bench or roof section may not fit down a narrow side passage; measure the route first. Finally, the build. Professional assembly is offered as an optional, separately priced extra on the U130 and P130, and the cabins arrive with step-by-step instructions for a self-build with a helper. It is the one line in the total you can trade for your own time.

A realistic 2026 budget, line by line

Pulling the pieces together, a sensible way to plan for an outdoor sauna in the UK is to write the current shop price for your chosen model on one line and then add four more lines beneath it, filling in only the ones that apply to your garden. The five lines are set out below.

For most buyers the sauna set is the largest line by a clear margin and the other four together add a smaller share on top, but that share is what separates a quoted price from a finished sauna. Work through it once, honestly, and the question of whether a barrel or a cube is the better buy answers itself for your garden, your household and the number of evenings you will actually spend inside.

• Sauna set: the current shop price for your model, heater and stones included.
• Base: nil if you have a suitable patio or slab; a quoted figure from a groundworker if not.
• Electrics: a written quote from a qualified electrician, based on the cable run and the heater's requirements for your model.
• Delivery: confirmed for your postcode with SAUNARI before you order.
• Assembly: nil for a self-build, or the price of optional professional assembly, confirmed with SAUNARI before you order.