Cube Sauna UK: Complete Buying Guide 2026 – Prices, Sizes & Cube vs Barrel

If you are researching a cube sauna UK buyers can install in a garden, the short answer is simple: a cube sauna is a straight-walled outdoor sauna cabin with a more contemporary look and more consistent internal headroom than a rounded barrel sauna. In the UK market, that means you can now choose from compact 1 to 2 person options through to larger 5 to 6 person models. A good starting point is the Cube Saunas collection, where you can compare current models, pricing and availability.

Buying a cube sauna for a UK garden in 2026

A cube sauna can be an excellent choice if you want a permanent garden sauna with modern styling, practical bench space and a shape that makes better use of vertical room. The current KOVE range at Your Fitness Hub gives a clear view of what many UK buyers are comparing: a compact 1 to 2 person model, a flexible 3 to 4 person model, and a larger family-sized 5 to 6 person sauna.

If you are also comparing broader outdoor options, the Outdoor Saunas collection and KOVE Saunas collection are worth viewing alongside this guide.

What Is a Cube Sauna?

A cube sauna is an outdoor sauna cabin built around straight or near-straight walls rather than a circular or curved barrel shape, offering an ideal detox environment. The name describes the cabin format, not a different type of heat or sauna experience. In practical terms, it is still a traditional heated sauna, and in the current Your Fitness Hub range that means electric Harvia heaters inside timber-built outdoor cabins.

Side-by-side outdoor cube sauna and barrel sauna showing straight walls, curved walls, and differences in headroom and interior space.

Most cube saunas use timber construction, often with a modern glazed front or large glazed door area. That architectural look is a big part of their appeal in UK gardens, especially where buyers want the sauna to sit neatly alongside contemporary paving, decking or landscaped planting.

The biggest design difference is inside. Curved walls in a barrel sauna can reduce standing room near the sides, while a cube layout tends to keep headroom more consistent across the interior.

Why Choose a Cube Sauna?

Cube saunas have become popular because they combine the feel of a traditional outdoor sauna therapy with a cleaner, more architectural look. For many buyers, the real draw is not just appearance. It is the way the shape changes how the cabin feels in use.

A garden cube sauna often feels more open than a similarly sized rounded sauna because the straight walls give you more practical space for benches, shoulders and headroom. Large glazing also tends to work especially well with cube cabins, which is one reason they suit modern garden design.

Common reasons people choose an outdoor cube sauna UK model include:

• Better headroom
• Straighter internal walls
• Cleaner bench layouts
• Contemporary garden appearance
• Stronger sense of interior space
• A good range of capacities

There are trade-offs as well, and it is worth being realistic before you buy.

• Higher purchase price: cube models are often dearer than comparable barrel saunas.
• More garden space: larger 4 person cube sauna and 5 to 6 person models need a more generous footprint.
• Electrical setup: electric heater installation must match the product specification.
• Base requirements: a level, load-bearing foundation is essential.
• Outdoor care: timber still needs sensible maintenance over time.

Cube Sauna vs Barrel Sauna

If your shortlist already includes a barrel model, the decision usually comes down to style, space use and budget rather than heat quality alone. Barrel saunas often offer strong value and a classic Scandinavian-style appearance. Cube saunas usually provide more even headroom and a straighter, more spacious-feeling interior.

If you want to compare both formats in more detail, see the Barrel Saunas collection and the guide to Barrel Sauna UK: Pros, Cons, Costs & Buying Guide 2026.

Feature	Cube sauna	Barrel sauna
Appearance	Modern, architectural	Traditional, rounded
Headroom	More consistent across the cabin	Reduced near curved sides
Internal usable space	Strong use of straight walls	Efficient, though more curved internally
Bench layout	Easier to plan with straight lines	More dependent on curved shell
Garden footprint	Often more square or rectangular	Often compact for its length
Capacity feel	Can feel roomier for the rated capacity	Can feel cosier
Heating	Traditional electric heating in current KOVE models	Traditional electric heating in comparable models
Price	Often higher for equivalent capacity	Often better value
Small garden suitability	Compact models can work well	Often very good
Family suitability	Excellent in larger sizes	Also good, depending on model
Visual style	Best for modern outdoor sauna UK looks	Best for classic sauna styling

Neither design is universally better. A barrel sauna may suit buyers who want a traditional look and sharper value, while a cube sauna vs barrel sauna comparison often favours the cube shape when headroom and straight-walled interior space matter most.

What Size Cube Sauna Should I Buy?

Capacity labels are useful, though they should never be the only measure. A 4 person cube sauna can feel very different from another 4 person model depending on dimensions, bench depth and heater specification. If you are still deciding between capacities, the article What Size Sauna Do I Need? 1, 2, 3 & 4+ Person Sauna Guide UK is a helpful companion read.

1 to 2 person cube sauna

A 2 person cube sauna is usually the right starting point for solo users, couples and smaller gardens. It gives you the cube format without turning the whole project into a major garden build.

The KOVE Compact Cube Sauna 1–2 Person is the clearest example in the current range. It uses Canadian Spruce, includes a Harvia 4.5kW electric heater, and has a compact external footprint of 126 x 154 cm. With a current guide price around £2,999, it is particularly well suited to couples and tighter outdoor spaces. Check the live product page for current pricing and availability.

3 to 4 person cube sauna

For many buyers, this is the sweet spot.

A 4 person cube sauna gives you noticeably more elbow room and relaxation than a compact 2 person unit, without moving into the higher budget and garden footprint of a larger family cabin. The KOVE Cube Sauna 3–4 Person sits at the centre of the current range with Canadian Spruce construction and a Harvia 6kW heater. At around £4,299 as a guide price, it is often the most balanced choice for buyers who want more comfort, stronger social use and a modern outdoor sauna UK design that still feels practical for many gardens.

5 to 6 person cube sauna

If you expect regular family use, want a more premium garden sauna UK setup, or simply do not want to feel tight on space, the largest KOVE cube model is the step up.

The KOVE Cube Sauna 5–6 Person uses Canadian Spruce and a Harvia 8kW heater, with a current guide price around £5,999. This is the option for buyers who want significantly more interior room and a fuller outdoor entertaining or family wellness setup. As with all larger outdoor saunas, access, base preparation and electrics deserve early planning.

How Much Does a Cube Sauna Cost in the UK?

For a realistic cube sauna price UK view, the current KOVE range gives a useful baseline:

• KOVE Compact Cube Sauna 1–2 Person: around £2,999
• KOVE Cube Sauna 3–4 Person: around £4,299
• KOVE Cube Sauna 5–6 Person: around £5,999

Those figures are best treated as guide prices rather than permanent claims. Current pricing and availability can change, so it is sensible to check the live product pages before making a decision.

Your total project cost may also include more than the sauna itself.

• Base preparation: concrete, paving or another suitable engineered base.
• Electrical work: fixed installation by an appropriately qualified electrician where required.
• Assembly: depending on the model and delivery arrangement.
• Access considerations: narrow side passages, steps or lifting constraints can affect installation planning.
• Running costs: electricity use depends on heater output, warm-up time and how often you use the sauna.
• Timber care: ongoing outdoor maintenance should be budgeted for.

If you want to compare operating costs in more detail, read Sauna Running Cost UK: Your 2026 Guide to Home Sauna Expenses.

What Heater Size Does a Cube Sauna Need?

Heater output should be matched to cabin volume and the manufacturer’s specification, not chosen by person capacity alone. Harvia’s sizing guidance is a useful reference point here, as heater power is tied to sauna volume and non-insulated surfaces like glass can increase the required output.

In the current KOVE range, the compact 1 to 2 person model uses a 4.5kW Harvia heater, the 3 to 4 person model uses a 6kW Harvia heater, and the 5 to 6 person model uses an 8kW Harvia heater. That does not mean every sauna with the same capacity should use the same heater. Cabin dimensions, glazing and internal volume all matter.

For a closer look at sizing logic, it is sensible to read the sauna heater sizing guide on Your Fitness Hub before purchase.

Cube Sauna Electrical Requirements UK

The current KOVE outdoor cube sauna models use electric Harvia heaters and should be installed according to the individual product specification. The compact KOVE model states that a fixed-wired single-phase electrical connection is required and that installation must be completed by a qualified electrician.

That is the right mindset for all electric outdoor sauna buying in the UK. Do not assume a traditional outdoor cube sauna will plug into a standard domestic socket unless the product page says so clearly. Where fixed electrical work is required, it should be carried out by an appropriately qualified electrician and comply with current UK electrical requirements.

What Base Does an Outdoor Cube Sauna Need?

A cube sauna needs a stable, level and load-bearing base. That is one of the biggest practical factors in whether the final installation feels solid, drains properly and ages well.

Suitable bases may include properly prepared concrete, paving or another engineered structure that matches the product requirements and site conditions. You also need sensible drainage around the sauna and enough clearance for access, assembly and long-term maintenance. Always follow the specific product guidance rather than relying on a one-size-fits-all rule.

Do You Need Planning Permission for a Cube Sauna in the UK?

Many garden sauna installations may fall within permitted development rules, though that depends on the height, position, boundaries, listed status, property type and other site-specific details.

That means this is a check, not a guess. If you are unsure, review current Planning Portal guidance and speak to your local authority before ordering. The guide Garden Sauna UK: Planning Permission, Costs & Outdoor Sauna Setup Guide is a useful place to start.

Are Cube Saunas Suitable for UK Weather?

Outdoor-specific cube saunas are designed for year-round external use, provided they are installed correctly and maintained properly. That is why it matters to choose an outdoor model rather than treating every timber sauna as automatically suitable for garden installation.

In UK conditions, roof protection, a sound base, ventilation, drainage and routine timber care all matter. So does following the manufacturer’s care guidance. A well-sited outdoor sauna UK installation can work very well through British weather, though neglecting maintenance or putting the sauna on an unsuitable base will shorten its lifespan.

Best Cube Saunas for Different Buyers

Based on the current Your Fitness Hub range, these are retailer recommendations built around layout, capacity, service, and likely buyer needs, not lab-tested awards. You can also compare them with the wider Best Outdoor Saunas UK: 5 of the Best Garden Saunas for 2026 guide.

Best suited category	Model	Capacity	Heater	Approx. current guide price	Best suited to	Key consideration
Best for small gardens	KOVE Compact Cube Sauna 1–2 Person	1–2	4.5kW Harvia	£2,999	Solo users, couples, compact spaces	Less room for group use
Best all-round cube sauna	KOVE Cube Sauna 3–4 Person	3–4	6kW Harvia	£4,299	Buyers who want space, comfort and flexibility	Higher budget than compact models
Best large / family cube sauna	KOVE Cube Sauna 5–6 Person	5–6	8kW Harvia	£5,999	Families, social use, larger gardens	Needs more space and stronger project planning

Is a Cube Sauna Worth It?

For many buyers, yes.

A cube sauna makes particular sense if you want a permanent garden sauna, prefer modern styling, value interior headroom and like the look of larger glazing. It is especially appealing when the sauna is meant to become a visible part of the garden rather than something tucked away at the back of it.

It is usually a strong fit for buyers who want:

• Modern design
• More practical headroom
• Straight-walled bench space
• A more spacious feel
• A long-term outdoor sauna setup

A barrel sauna may suit you better if you prefer a more traditional shape or want stronger value at a lower purchase price. If garden installation is not right for your property, an indoor or infrared sauna may be the better route.

Cube Sauna UK FAQs

What is a cube sauna?

A cube sauna is a straight-walled or near-straight-walled sauna cabin, usually built from thermowood or timber and often designed for outdoor use.

Are cube saunas better than barrel saunas?

Not in every case. Cube saunas usually offer better headroom and a more modern look, while barrel saunas often offer better value and a more traditional appearance.

How much does a cube sauna cost in the UK?

In the current Your Fitness Hub range, guide prices start at around £2,999 for a compact 1 to 2 person model, around £4,299 for a 3 to 4 person model, and around £5,999 for a 5 to 6 person model. Check live product pages for current pricing.

What size cube sauna should I buy?

Choose based on how many people will use it at one time, how much bench space you want, your garden size and your budget. Many buyers land on a 3 to 4 person model as the most balanced option.

Can a cube sauna stay outside all year?

Outdoor-specific models can, provided they are installed correctly, maintained properly and placed on a suitable base.

Does a cube sauna need planning permission?

Sometimes no, though it depends on the site and property. Check current permitted development guidance and your local authority if you are unsure.

Does a cube sauna need an electrician?

If the product requires fixed electrical installation, yes. The work should be carried out by an appropriately qualified electrician in line with UK requirements.

What base does a cube sauna need?

It needs a level, stable, load-bearing base with good drainage. Concrete and properly prepared paving are common choices where suitable.

How hot does a cube sauna get?

That depends on the heater, controls and manufacturer settings, though traditional electric saunas are generally designed to reach typical sauna bathing temperatures.

How long does a cube sauna take to heat up?

Warm-up time varies by heater size, cabin volume, outdoor temperature and how the sauna is used. Larger cabins generally take longer than compact models.

What is the best cube sauna for two people?

The KOVE Compact Cube Sauna 1–2 Person is the most obvious match in the current range for couples and smaller gardens.

What is the best cube sauna for a family?

The KOVE Cube Sauna 5–6 Person is the strongest option in the current range for families or buyers who want more space for shared use.