Custom Trailer Saunas | Built in Duluth, Delivered Nationwide

A mobile sauna is a full traditional sauna built on a trailer, so it meets every requirement of a stationary sauna without needing a foundation, a concrete pad, or site prep.

At BW Sauna Co. that means no compromise. It is not a tent and not a shack bolted to a utility trailer. It is a cedar-lined hot room with a corrugated steel exterior, 360 degree wall insulation, and a real sauna heater from IKI, Kuuma, or Harvia, built in Duluth, Minnesota and engineered to deliver the same heat quality as a luxury home sauna.

More on the format: why own a mobile sauna in Minnesota and the history of the mobile sauna on a trailer.

Pick by the group you actually host, not the group you occasionally host. BW builds three standard sizes.

• The Huron, 6.5 x 8 ft. Seats 5 to 8. A dedicated hot room with no changing room, which is how it stays compact enough to fit in a standard garage or tuck into a backyard. The right call for personal use, cabins, campsites, and ice fishing.
• The Superior, 6.5 x 12 ft. Seats 7 to 10. The balanced build, with an optional changing room and custom window sizing and placement.
• The Gooseberry, 6.5 x 14 ft. Seats 10 to 12. The flagship, with changing room options and fogless UV-protected windows. The most common choice for commercial operators who need capacity per session.

All three share the same wall system, trailer frame, and finish standard. Size changes footprint and capacity, not quality. For a deeper walkthrough see choosing the ideal sauna size.

Buy mobile if you want the sauna to follow you, if you rent your property, if you may move, if zoning is a problem, or if you want to use it at a cabin and at home. Buy stationary if the sauna will live in one place permanently and you want a larger footprint than a trailer allows.

A mobile build also sidesteps the pad, the permit conversation, and the construction timeline entirely.

Both sides of the decision: mobile sauna vs home sauna, the lake house sauna guide, and the custom home sauna lineup.

On the Superior and the Gooseberry, yes. The Huron is built as a dedicated hot room, which is exactly how it stays compact enough to fit in a garage.

A changing room gives you a dry place to set towels and clothing and a spot to cool down between rounds without stepping outside, which matters in a Minnesota February. The trade is capacity. Commercial operators often skip it and keep the full footprint as hot room to move more people per session.

See other customization options that change how a sauna feels.

Fully custom. Standard models are a starting point, not a limit.

Regular custom work includes 24 exterior siding color choices, custom exterior doors, window sizing and placement, bench layout changes, wall paneling selections, stove selection, a sloped sauna floor, an exterior shower hookup, a cold plunge tank, a wood box, and an off-grid solar package. Custom builds get a design call and in-house 3D renderings drawn by Jayson before a single cut is made.

Start here: what to consider when building a custom mobile sauna, or run the custom sauna quote tool.

Anywhere level with clearance for the tow vehicle to back in. Most owners park on a gravel bed or a slab near the house, with the door facing away from prevailing wind and toward the view.

Placement affects how often you actually use the sauna more than most buyers expect. Read the art of sauna placement and how to choose the ideal spot.

A BW mobile sauna starts at $39,900. The Huron starts at $39,900, the Superior at $43,500, and the Gooseberry at $47,000. Cost is driven by three things: footprint, interior finish, and heater.

Common additions are a porch at $2,300 and a changing room at $3,000. A wood-fired stove is included in the base price.

For market context, barrel saunas mounted on a utility trailer run roughly $15,000 to $20,000. Prebuilt modular units land between $14,000 and $39,000. Custom traditional trailer saunas from established shops run $24,000 to $38,000 and up.

BW builds in the custom tier, to the standard of a home sauna in a multi-million dollar property, engineered to last 20 to 40 years rather than 3 to 8. A meaningful share of BW builds replace a competitor sauna that failed inside five years.

Full breakdown: why mobile saunas cost what they cost and where you can and cannot save.

Six to eight weeks from deposit to delivery is the average. It can run longer depending on the shop schedule and current demand, and custom builds add design time on the front end. You get a real timeline before you commit, not an optimistic one.

You get photo updates every single day of the build. Even on days spent waiting on materials, you still hear from us.

See what to expect during delivery and installation.

BW does not currently work with a financing partner, so there is no in-house payment plan to apply for.

Buyers who finance typically arrange it themselves. Commercial operators commonly finance the sauna as a business asset through their own lender or an equipment loan, since a unit earning revenue underwrites differently than a personal purchase. Homeowners generally use a home equity line or a personal loan.

Happy to talk through deposit and payment timing on a call.

It can work, but the failure points on a used trailer sauna are expensive and mostly invisible at a walkthrough. Moisture in the wall cavity, a rotted floor edge, a stove past its service life, and trailer frame fatigue are the four that end up costing more than the discount.

If you are shopping used, go through what to check before you buy a used mobile sauna first.

Fitz or Jayson. There is no call center and no sales team.

First calls are led by Fitz. Jayson Stolp, the founder, handles design and custom work and draws the renderings himself. Support does not end at delivery either. When you call two years from now, you reach the same two people.

Read what customers say, browse completed projects, or see how to choose a Minnesota sauna company.

Over 50 saunas and five years of building them, on top of a lifetime in construction, all of it out of the shop at 6166 Jean Duluth Rd in Duluth. Every design has been tested, adjusted, and optimized in real Lake Superior conditions.

The lessons that matter are almost entirely about moisture and wall assembly, which is exactly what a buyer cannot inspect on a walkthrough. BW currently holds a 5.0 rating across 28 Google reviews.

The full account: what 10,000 hours of sauna building taught us.

A half-ton truck handles the Huron and the Superior. For the Gooseberry, plan on a three-quarter-ton or better.

Estimated dry weights, based on the build assembly rather than a scale ticket:

• The Huron, 6.5 x 8 ft. Roughly 3,500 to 4,000 lbs. Tow vehicle rated 6,000 lbs or more.
• The Superior, 6.5 x 12 ft. Roughly 4,500 to 5,000 lbs. Tow vehicle rated 7,500 lbs or more.
• The Gooseberry, 6.5 x 14 ft. Roughly 5,000 to 6,000 lbs. Tow vehicle rated 9,000 lbs or more.

Planning figures, not scale readings. Weight moves with heater, layout, windows, siding, and whether you add a porch or changing room, so confirm your build's actual weight with us before towing.

Total towed length including the tongue is 15 ft, 18 ft, and 19.75 ft. Check that against your garage or gate.

Every BW rides on a steel drop-down frame that cranks down when parked, keeping the sauna flat and taking load off the suspension. That is a structural decision, and a large part of why the wall system does not flex and fail over time.

More on the frame and build standard: what makes a high quality mobile sauna trailer.

Across the continental United States. BW builds are running in Minnesota, Wisconsin, Illinois, Colorado, Arizona, California, Washington, Oregon, North Carolina, and Florida.

Delivery is personal, not freight. The sauna is set in place and ready to use the moment we pull away. Delivery is quoted by distance at the time of order.

Regional pages: Minneapolis, St. Paul, Chicago, Denver, Seattle, and everywhere else we build.

No foundation. There is no pad to pour and no site prep, which is the core advantage of a mobile build.

Permitting is worth one local phone call. Because the sauna stays on a trailer, most jurisdictions treat it as a towable rather than a structure. That is exactly why buyers who hit a zoning wall on a backyard sauna end up choosing mobile. Rules vary by municipality, so confirm before you order.

Related: permits for an outdoor sauna in Minneapolis and whether you need a sewer connection for a sauna drain.

Yes, and most owners do. A large share of BW customers keep the sauna on a backyard slab and use it two to three times a week, then hitch up for a cabin weekend, a lake spot, or an ice fishing trip.

The exterior is built for all-weather exposure and the wall system is sealed so moisture never reaches the cavity. These are built on the shore of Lake Superior, for Lake Superior winters.

If the sauna sits at a seasonal property, read how to winter a cabin sauna in Minnesota.

A BW does. Most mobile saunas do not, and that is the honest reason the category has a reputation problem.

The difference is the wall. An eight layer heat design with 360 degree insulation, floor included, delivers six times the thermal performance of a barrel sauna and twice that of a CLT sauna. Insulation is R-13 standard or R-15 fire resistant mineral wool. It heats faster, holds temperature longer, and sheds moisture properly instead of trapping it.

The engineering, in detail: the heat layers of a trailer sauna and the space blanket inside your sauna wall. On target temperature, see the best sauna temperature for you.

BW offers wood-fired, electric, and propane. Wood fired is the recommendation for a mobile build. It gives the strongest heat output and the best löyly, and it works anywhere with no power source at all, which is the entire point of a sauna you can take to a lake.

Electric suits builds that stay near reliable power. Propane is the middle ground when you want push-button heat away from an outlet. Stove options include IKI, Kuuma, and Harvia, sized to the room rather than to a spec sheet, with metal heat shields behind and under the stove on every build.

Go deeper: electric or wood burning stove, what makes a sauna heater actually good, and how to calculate heater size.

Not with a wood stove, which is what we recommend. The heat source is wood, so electrical draw is limited to lighting and accessories. An optional external battery unit runs the lighting system so you always have light wherever you park.

An off-grid package with solar is available if the sauna will spend time well away from power. Electric-heated mobile saunas draw considerably more and need a proper circuit or a correctly sized generator, which is a conversation worth having before you order rather than after.

Run the numbers: how much electricity portable saunas really use and whether a generator, solar, or battery can run a mobile sauna heater.

Cedar stays cool to the touch at sauna temperature, resists rot and moisture, and does not warp or leach resin the way softwoods do. That combination is why it has been the standard for a century.

Every BW build uses 1x4 cedar tongue and groove on the walls and ceiling with 2x4 cedar benches, sustainably sourced, with thermally modified wood and alternate paneling options available.

Material reading: why saunas use cedar, cedar sauna wood, and the best material for an outdoor sauna.

Single pane glass in a sauna does two things badly: it bleeds heat, and it fogs the moment the room is up to temperature, so the view you paid for disappears.

Double pane holds heat in and keeps the glass clear. Window packages can be expanded to side glass, rear glass, panoramic spans, and skylights.

The design thinking: sauna window design, claustrophobia, and moisture.

Every BW mobile sauna ships with the same core spec regardless of size:

• Maintenance-free metal siding and roofing, mono pitch roof
• Fully insulated walls, ceiling, and floor, R-13 standard or R-15 fire resistant mineral wool
• High-efficiency 8 layer heat design
• Wood-fired sauna stove with metal heat shields behind and under it
• 1x4 cedar tongue and groove walls and ceiling, 2x4 cedar benches
• Non-slip waterproof vinyl flooring with a floor drain
• Dedicated intake and exhaust venting
• Tempered sauna window, 4 ft wide by 2 ft high in the hot room, size and placement adjustable
• Dimmable LED can lighting plus dimmable LED tape under the top bench
• Exterior LED light
• Custom wood exterior door with window
• Heavy-duty steel mobile base with trailer lighting

Nothing on that list is an upsell. See what makes a high quality mobile sauna trailer.

Yes. An off-grid package with solar is available, and with a wood stove the sauna needs no external power at all to reach temperature. Solar handles the interior and exterior lighting.

That combination is what makes a BW workable at a remote cabin, on a frozen lake, or at an event with no hookups.

Detail on the power question: can a generator, solar, or battery run a mobile sauna heater.

A barrel sauna has wall thickness but no insulated cavity, so it loses heat fast and struggles below freezing. A kit is not engineered for trailer loads or for daily commercial use. Both typically last 3 to 8 years.

A BW is a built assembly: eight heat layers, sealed cavity, R-13 or R-15 insulated walls, ceiling and floor, a steel trailer frame, and non-slip waterproof flooring with a floor drain and dedicated intake and exhaust venting. Six times the thermal performance of a barrel and twice that of CLT, built to be serviced and maintained for decades.

The failure analysis: what breaks first in kit and barrel saunas, the four ways saunas die in your yard, and custom built vs pre-fab.

20 to 40 years and beyond with proper care. BW is often called in to replace saunas that failed after two to five years, which is the realistic lifespan of a kit or barrel exposed to a northern climate.

The difference is that a BW is built to be maintained, serviced, and lived with, not replaced.

More: how long an outdoor sauna lasts.

A trailer sauna is as safe as a camper compared to a house. The two things that matter are correct stove clearances and correct ventilation, both of which are engineered into the build rather than left to the owner.

The one rule we ask: do not run the sauna while towing.

Detail on both: how safe portable saunas are and fire safety with mobile saunas.

That is a large share of what BW builds. Operators run BW units for event and pop-up rentals, per-session bookings, gym and recovery studio placements, and short-term rental properties.

A sauna running as a business asset faces daily traffic, back-to-back heat cycles, wet benches, and cleaning chemicals. Most mobile saunas are not built for that and fail at the wall system first. A BW is built to run for the lifetime of the operation.

Start here: starting a mobile sauna business, sauna business ideas, the business case for sauna rentals, and the BW mobile sauna business page.

Every bench lifts out and the floor mat lifts out, which turns a deep clean into a short job instead of an afternoon. That is why commercial buyers come back for a second and third unit.

Wash the interior cladding down periodically and ventilate after each use to keep everything dry. Nothing proprietary, nothing on a service contract.

Full routine: custom sauna maintenance tips and when to replace your sauna stones.

It is one of the few amenities that raises both nightly rate and off-season occupancy, because it turns a cold-weather month into a reason to book rather than a reason to skip. Guests increasingly choose a sauna over a hot tub, and the maintenance burden is far lower.

A mobile unit also sidesteps the permitting and construction timeline that stops most hosts from adding a sauna at all.

The numbers: boosting Airbnb value and rates with a sauna, why guests prefer saunas over hot tubs, and Airbnb cap rate explained.

Yes. Commercial builds are specified differently: higher capacity per session, faster turnaround between groups, and finishes chosen for cleaning rather than for a living room.

Ski resorts, recovery studios, gyms, offices, and hotels all run BW units.

See American made commercial saunas, why sauna is a strategic investment for ski resorts, and sauna for offices.

10 to 20 minutes per round is typical at medium to high heat. Beginners should start at 5 to 10 minutes and build tolerance over several weeks. Experienced users commonly run 15 to 20 minutes, which is the range where the cardiovascular research shows the strongest effect.

Lower the temperature if you want longer, conversational sessions. Hydrate before and after.

The research: how long to stay in the sauna for maximum benefit.

Two to three times a week is where most BW owners land, and it is also where the research shows benefit accumulating. Some build it into a daily routine.

More: how often to visit the sauna and whether daily sauna use is healthy.

Heat the room, sit, pour water on the stones for löyly, cool down, repeat. Two to three rounds is standard. The cool-down between rounds is not optional, it is the part that does the work.

Walkthroughs: how to use a traditional Finnish sauna and how contrast therapy actually works.

Yes. A cold plunge tank is an available option on a BW build, as is an exterior shower hookup for the rinse in between.

The pairing is the reason most owners end up using the sauna more than they expected. Hot to cold to hot is the traditional cycle, and it is what turns a sauna from a nice amenity into a routine.

Before your first one, read everything to know before your first cold plunge.