Outdoor Cube Saunas — Modern, Glass-Fronted
Cube saunas trade the rustic barrel look for a clean architectural form: square frame, flat roof, often a full glass front, with more headroom and bench length than a barrel of the same footprint. The modern design statement for the garden — from £4,710 complete with a heater, 2 to 6 person.
Three routes into a cube
Estonian-built cubes — our widest choice, made in Estonia in Nordic spruce or thermowood with electric, wood-fired or off-grid gas heat on most models. The compact Solo 205 needs only 1.25 m of depth, which is often the answer for a side return. Above it sit the Tallin 160, 200, 250 and 220 XL, the wood-fired Tallin 385 XL, and the Pärnu S and Pärnu L.
Gas-ready Steam & Oak cubes — the more affordable route, with electric or wood-fired options, from the 1.8m up to the 3.4m Premium L-Bench. Ideal if you want the cube look without the top-end price, or off-grid gas heat.
Holl’s ThermoWood cubes — heat-treated Thermowood with a premium finish: the Hestia (3–4 person), the Hestia Lounge with terrace, and the mirrored-glass Onyxia Cube (4 person).
Why a cube
The glass front brings light in and frames the garden; the square shape gives generous headroom; and quality cubes are built in Thermowood for outdoor durability. The trade-offs versus a barrel are a slightly higher price and running cost (the glass is a heat-loss point), which is why the glazing quality matters. Full detail — glazing, Thermowood, cube vs barrel vs cabin — is in our Cube Sauna UK guide.
Fitting a cube into a real garden
A cube's flat back sits against a wall or fence far more neatly than a curved barrel, which is usually what decides it on a narrow plot. Depth is the number to check first: the Solo 205 needs about 1.25 m, most mid-size cubes 2–2.5 m. Also check the route to the spot, not just the spot — flat-pack panels go through a standard side gate, but the pallet needs somewhere firm to be set down. Our installation guide covers bases, access and what it all costs.
Cube sauna FAQs
How much does a cube sauna cost?
From £4,710 for a compact Estonian cube complete with an electric heater, up to around £10,999 for a large premium ThermoWood cube. Most 4-person cubes land between £5,000 and £7,500. A cabin only, without a heater, starts at £4,195 if you are sourcing your own.
Are glass-front cube saunas energy efficient?
A quality cube with toughened, thermally efficient glazing and good seals holds heat well — the glass is the main heat-loss point, so the glazing spec is what matters. Quality Thermowood walls help it hold temperature.
Cube or barrel sauna — which is better?
A barrel is better value and heats more efficiently (less air to heat); a cube offers a modern design, glass front and more headroom, at a somewhat higher price and running cost. A cube also sits flat against a wall or fence, which often decides it on a narrow plot. Choose a barrel for value, a cube for design and fit.
Are cube saunas electric, wood-fired or gas?
All three. The Holl’s ThermoWood cubes ship with an electric heater; our Estonian and gas-ready Steam & Oak cubes offer electric, wood-fired or off-grid propane — the option that avoids a trench and an electrician's quote entirely.
How much space does a cube sauna need?
Less than most people assume. A compact cube needs roughly 1.25–2 m of depth and about 2 m of width; a 4–6 person cube is nearer 2.5 m deep. Leave a gap behind and to the sides for air to circulate, and make sure the base drains away from the timber.
Build service: these arrive flat-packed — we offer construction from £500, applying insulating paste between every panel for better heat retention than a standard fit. Sauna installation FAQs.
For running costs by heat type, see How Much Does a Sauna Cost to Run? Prefer a curved barrel? See Outdoor Barrel Saunas. For full-height glazing see Glass Saunas, for the Estonian range see Nordic Saunas, or browse all Outdoor Saunas.
