What is the best outdoor sauna for home use?

The best outdoor sauna depends on climate, space and heat preference. Barrel saunas heat quickly and suit 2-6 people; insulated cabin or cube saunas hold heat better in cold winters and can include a changing room; outdoor infrared saunas suit users who prefer gentler heat. Match heater type to your available power.

Do you need a foundation for an outdoor sauna?

Yes. An outdoor sauna needs a level, well-drained base such as a compacted gravel pad, concrete slab, pavers or a strong deck. The base must carry the cabin, stove, stones and occupants without settling. Keep the wood off bare soil and allow airflow underneath so the floor dries between sessions.

Can you put an infrared sauna outside?

Only if it is built for outdoor use. An outdoor infrared sauna needs a weatherproof roof, sealed exterior and outdoor-rated wiring. Standard indoor infrared cabins are not designed for rain, snow or UV exposure. In cold climates, infrared models also take longer to warm and may struggle to reach full temperature.

What is the difference between a barrel sauna and a cube sauna?

A barrel sauna is a cylinder of thick interlocking staves with a small interior volume, so it heats quickly and sheds rain. A cube sauna is a box-shaped, usually insulated cabin with a flat or low-slope roof and a modern look. Cubes use space more efficiently for benches and changing rooms but need a well-sealed roof.

Do I need a permit for a backyard sauna?

Often. Many US towns treat a backyard sauna as an accessory structure, which may need a building permit above a certain size, plus electrical permits for hardwired heaters and chimney or fire permits for wood stoves. Setback rules and homeowner association covenants may also apply. Ask your local building department before ordering.

Is an outdoor steam room the same as an outdoor steam sauna?

Not usually. A true outdoor steam room uses a steam generator and fully waterproof, tiled or acrylic walls at near 100% humidity. Most products sold as outdoor steam saunas are traditional saunas where you create steam by pouring water on hot stones. A traditional sauna is far simpler to build and maintain outdoors.

Outdoor Sauna Buying Guide: Barrel, Cabin or Cube?

Short answer. An outdoor sauna is a freestanding, weatherproof cabin heated by an electric stove, a wood-burning stove or infrared panels, set on its own foundation in a backyard or garden. The main choice is shape (barrel, cabin or cube), then heat source, wood species and size. Before buying, confirm your foundation, power supply or chimney route, and local permit rules, because those decide which outdoor sauna kits will actually work on your property.

This buying guide walks through each design, compares them in a table, and ends with a pre-purchase checklist.

What types of outdoor saunas are there?

Barrel sauna

A barrel sauna is built from thick tongue-and-groove staves, often about 40-45 mm (1.6-1.8 in) thick, held together by stainless steel bands. The round shape reduces interior volume, so a traditional heater warms it quickly, and rain and snow run off the curved roof. Barrels typically seat 2-6 people. The trade-off is less flexible bench layout and limited headroom at the sides. See our barrel saunas for sizes.

Outdoor cabin sauna

A cabin style sauna looks like a small garden building: framed or solid-wood walls, a pitched roof, and often a porch or a separate changing room. Insulated cabins hold heat better in cold climates, and an outdoor sauna with a changing room gives you a dry place to undress and store towels. Cabins are the most versatile shape for larger families.

Cube sauna

A cube sauna, sometimes called a modern sauna or contemporary outdoor sauna, is a box-shaped cabin with a flat or low-slope roof, large glass panels and clean lines. Cubes use interior space efficiently and can be modular, but their roofs need careful sealing and drainage, and large glass areas lose heat, which means a larger heater.

Outdoor infrared sauna

An outdoor infrared sauna uses carbon or ceramic infrared panels inside a weatherproof shell. Infrared cabins run at lower air temperatures, typically 45-60 °C (113-140 °F), and many small models are offered in 110-120V builds. In freezing weather they take longer to warm, so insulation and a sheltered location matter more.

Portable outdoor sauna

Tent-style or compact portable saunas are lighter, cheaper and movable, but less durable and less hot than a permanent wood sauna. They suit renters or occasional use.

Barrel vs cabin vs cube: comparison table

Feature	Barrel	Cabin	Cube	Outdoor infrared
Typical capacity	2-6	2-8	2-6	1-4
Heat-up (traditional heater)	Fast, small volume	Moderate	Moderate	15-30 min, slower in cold
Insulation	Usually solid wood only	Often insulated	Often insulated	Varies
Changing room option	Some models	Common	Some models	Rare
Roof	Curved, sheds water	Pitched, shingle or metal	Flat or low slope	Pitched or flat
Look	Rustic, Nordic	Traditional garden building	Modern, minimalist	Varies
Best climate	Mild to cold	All, especially cold	Mild to cold, well sealed	Mild

Which heater should your backyard sauna use?

The heater shapes the experience more than the shape of the cabin.

Electric sauna heater: the most common choice for an outdoor traditional sauna. Typical home heaters are 4.5-9 kW and usually need a dedicated 240V circuit. In the US they should be listed to UL 875. Mars Sauna's listed traditional models use electric stoves of roughly 3.5-6 kW.
Wood-burning stove: no electrical supply needed, and many people consider it the most authentic outdoor wood sauna. It needs a chimney installed to NFPA 211 and local code, plus firewood storage. Read our wood-burning sauna stove guide.
Infrared panels: lower operating cost per session and gentler heat, but no löyly. Mayo Clinic notes that infrared saunas raise heart rate and sweating at lower temperatures than traditional saunas.

Outdoor dry saunas and "steam saunas" are usually the same thing: a traditional sauna where you throw water on hot stones to raise humidity. A true outdoor steam room needs a steam generator, waterproof walls and drainage, and is rarely practical as a freestanding backyard building.

Health research mostly concerns traditional saunas. A 2015 study of 2,315 Finnish men in JAMA Internal Medicine linked frequent sauna use with lower cardiovascular mortality, but it was observational and cannot prove cause.

Which wood is best for an outdoor sauna?

The exterior of an outdoor sauna faces rain, UV and freeze-thaw cycles, so wood choice matters.

Western red cedar: naturally decay resistant, aromatic and dimensionally stable. The USDA Wood Handbook classifies western redcedar heartwood among the woods resistant to decay. An outdoor cedar sauna is the classic premium choice.
Canadian hemlock: pale, even-grained and odor-neutral, popular for interiors and value-focused cabins; outdoors it benefits from a protective exterior finish and good roof overhangs.
Thermally modified woods and pine: used by some builders for exteriors; check how the wood was treated and keep treated wood out of the hot room.

Mars Sauna builds outdoor cabins in western red cedar and Canadian hemlock, so buyers can choose between natural decay resistance and a lighter, more neutral interior.

How big should an outdoor sauna be?

Plan around 2 ft (60 cm) of bench per seated person and a 6 ft (183 cm) bench if anyone wants to lie down. A 2 person outdoor sauna is often about 5-6 ft long; a family barrel for 4-6 is usually 7-8 ft long. Adding a changing room or porch adds 2-4 ft. Bigger is not always better: every extra cubic foot must be heated, which affects heater size, warm-up time and running cost.

Site, foundation and power: what to plan before you buy

Foundation

An outdoor sauna needs a level, firm, well-drained base. Common options:

Compacted gravel pad with pavers or concrete footings under the cradles or sills
Poured concrete slab, sloped slightly for drainage
A strong, level deck rated for the weight of the cabin, stove, stones and people

Keep wood off bare soil and allow air to move under the floor.

Power and wiring

A hardwired electric heater usually needs a dedicated 240V circuit run underground to the sauna, plus a disconnect and outdoor-rated components, installed by a licensed electrician. Use our power calculator to estimate amps, and read sauna electrical requirements for 120V vs 240V planning.

Permits and placement

Check local rules on accessory structures, setbacks from property lines, and wood-burning restrictions. Place the door away from prevailing winds, keep a clear path for night use, and consider privacy, a cold shower or plunge, and views.

Outdoor sauna kits vs pre built saunas vs custom

Option	What arrives	Effort	Best for
Outdoor sauna kit	Pre-cut panels or staves, heater, benches	1-3 days for two people, plus wiring	DIY-minded buyers
Pre built (prefab) sauna	Fully assembled cabin, craned into place	Site prep and connection only	Fast installs, good site access
Modular sauna	Factory-built sections joined on site	Moderate	Larger cabins, tight access
Custom outdoor sauna	Built to your drawings	Highest	Unusual sites, specific designs

Prefabricated sauna kits keep costs down and ship efficiently; fully built units save installation time but require crane or truck access. Our sauna installation guide covers both routes step by step.

What drives the cost of an outdoor sauna?

Rather than a single number, price depends on a handful of factors:

Size and shape (barrels use less material per seat; cabins with changing rooms use more)
Wood species and grade (clear cedar costs more than hemlock or knotty grades)
Heater type and power (wood stove and chimney vs electric heater and wiring)
Insulation, glass area and roofing material
Foundation and site work
Electrical installation distance from the house
Delivery, assembly and permits

For typical ranges and running costs, see how much does a sauna cost.

Outdoor sauna buying checklist

Decide on heat: traditional electric, wood-fired, or infrared.
Confirm your power supply or chimney route.
Measure the site and check setbacks, HOA rules and permits.
Choose a shape for your climate and style: barrel, cabin or cube.
Choose wood species and check exterior finish and roof material.
Size for your household, plus a changing room if winters are cold.
Plan the foundation and drainage.
Confirm the heater is certified for your market and the cabin voltage matches your supply.
Budget for delivery, assembly and electrical work.
Plan safe use: Harvard Health suggests sessions of no more than 15-20 minutes, no alcohol and plenty of water afterward.

This article is general information, not medical advice. People who are pregnant, have heart disease, low or high blood pressure or other conditions should talk to a doctor before using a sauna.

Sourcing outdoor saunas for retail or hospitality

Distributors, retailers, glampsites and spas can browse Mars Sauna's outdoor saunas, including barrel, cabin and cube designs with electric or wood-burning heat, in 110-120V or 220-240V builds. Wood, heater, size, control panel and branding can be customized; request a quote with your target market and quantities.

Key takeaways

Choose an outdoor sauna by heat source first (electric, wood or infrared), then shape: barrel, cabin or cube.
Barrels heat fast and shed weather; insulated cabins and cubes suit cold climates and changing rooms.
Western red cedar is naturally decay resistant; hemlock is a lighter-toned, value-focused option that benefits from good exterior protection.
Plan a level, drained foundation, a 240V circuit or a code-compliant chimney, and local permits before ordering.
Size at about 2 ft of bench per person, adding a lying bench or changing room only if you will use it.