8 x 12 Grand Sauna

A Home Sauna Oasis

A true home sauna oasis designed for homeowners who want space, comfort, and artisan-level craftsmanship. The 8 x 12 Grand offers a balanced footprint with room to relax, entertain, and unwind, all built with premium materials inside and out.

4–6+

Comfortable capacity

8 x 12

Spacious layout

Layout

Hot room with optional changing room

Clear View

Custom window options

Specifications & Design

Wood burning Thermally Modified Wood | Custom outdoor sauna in Minnesota

8 x 12 Grand Space Configuration

The 8 x 12 Grand provides a generous hot room layout with expanded benching and circulation space. It is ideal for homeowners looking for a dedicated backyard retreat that feels substantial without overwhelming the property.

An optional changing room can be added to create separation between the hot room and entry, making the experience more comfortable year-round.

Window Selection & Lighting

A 4’W x 2’H tempered window comes standard in the hot room to provide natural light and openness. Window sizing and placement can be customized to match privacy needs and property views.

Dimmable LED tape lighting beneath the top bench and dimmable overhead can lighting allow you to set the right atmosphere for daytime sessions or evening relaxation. An exterior LED light provides safe access after dark.

Read More:
Windows designed to eliminate claustrophobia, moisture & fog problems 

Exterior & Interior Finish Options

Interior finishes include 1×4 cedar tongue-and-groove on walls and ceiling paired with 2×4 cedar benches. These materials are selected for durability, heat performance, and visual warmth.

The exterior features maintenance-free metal siding and roofing available in 24 color options. The mono pitch roof adds a clean architectural profile while ensuring effective water runoff.

Engineered Excellence

The 8 x 12 Grand is fully insulated in the floor, walls, and ceiling to maintain consistent heat and energy efficiency. Metal heat shields are installed behind and beneath the stove for safe operation.

Choose a traditional wood stove for an authentic sauna experience, with optional off-grid solar packages available for remote or independent setups. Intake and exhaust venting ensures proper airflow and balanced heat distribution.

Read More: What 10,000 hr of sauna building taught us. 

  • 24 exterior siding color choices
  • Exterior door customizations
  • Wood stove selections
  • Sloped sauna floor option
  • Exterior shower hookup
  • Cold plunge tank option
  • Wood storage box
  • Changing room addition
  • Window sizing and location adjustments
  • Wall paneling selections

And many more options available

  • Maintenance-free metal siding and roofing
  • Wood stove
  • Optional off-grid solar package
  • Metal heat shields behind and under stove
  • 1×4 cedar tongue-and-groove walls and ceiling
  • 2×4 cedar benches
  • Floor drain
  • Non-slip, waterproof vinyl flooring
  • Fully insulated floor, walls, and ceiling
  • Mono pitch roof
  • Custom wood exterior door with window
  • Trailer lighting
  • Intake and exhaust venting
  • 4’W x 2’H tempered hot room window
  • Dimmable LED tape lighting under top bench
  • Dimmable LED can lighting
  • Exterior LED light

Details that Matter.

After talking on the phone with Jayson I knew he was my guy. He was able to conceptualize exactly what I needed for my spa as far as custom sauna design with a floor drain system.
8' x 14' mobile trailers
Luke P.
Sauna Business
Jeremy and Angela and their team are MAGIC!! Took troubled concrete floors in our loft in a 100 yr old building, and turned out beautiful.
Carolyn
Stained Concrete
We spent a good deal of time researching MN companies to build our custom Sauna and BW hit all the marks. From our first interactions, through the design, to the final install - everything went great.
8' x 14' mobile trailers
Niles
Mobile Sauna
Extremely happy with our BW build. After getting designs from a number of builders for a commercial use sauna we choose BW. The quality of the build is tremendous.
8' x 14' mobile trailers
Shawn S.
Sauna Buisness
I bought a mobile unit from BW sauna and have nothing but great things to say about working with Jayson and Brandon.
8' x 14' mobile trailers
Dom
Sauna for Buisness
Very professional and courteous, assessed our issue and located the parts needed for our sauna repair. Great communication and A+++ service.
8' x 14' mobile trailers
Shery
Mobile Saunas
BW Sauna delivered a rental unit for my extended family's use at Thanksgiving in Duluth. We were giving thanks as well as celebrating three birthdays.
8' x 14' mobile trailers
Tim
Class Training
The craftsmanship of the sauna is outstanding. The woodwork is impeccable, the attention to detail in the construction is evident and the sauna fits perfectly in my backyard.
8' x 14' mobile trailers
Andrew B.
Backyard 8x6

Our 8x12 is the biggest standard option. With optional changing room and countless customizations. This sauna is built for luxury heat for the whole family.

Backyard 12 ft Sauna Exterior !

Sauna was made to be more. A place where we go to reclaim our center and thrive.

A Lasting
Relaxation
Handcrafted
for You
Anywhere
you go
To enhance
active health
Improving
wellbeing

Questions you might be wondering?

Think about how you want to use the sauna, how much room you have, and how many people you want to fit. Compact models are great for small spaces, while larger models are better for entertaining guests or family use.
If you need more information on this topic, please visit “Ideal size for your custom outdoor sauna in Minnesota.“.

Yes, outdoor saunas are designed to withstand harsh winters and can be used year-round. They provide a warm retreat in winter and a relaxing cool-down area during summer.

If you need more information on this topic, please visit “How to benefit from your outdoor sauna in every season.

While some sauna kits are designed for DIY installation, it is often recommended to use professional services to ensure it is installed safely and complies with local building codes, especially in Minnesota where weather conditions can affect installation.

If you need more information on this topic, please visit “Custom outdoor sauna kits.“.

Yes, a building permit is typically required for outdoor sauna installations in many cities and states. It’s always best to check with your local building or planning department before starting installation to ensure compliance with local codes and zoning regulations.

For example, cities like Minneapolis require permits for outdoor sauna installations. Local guidelines can help clarify what applies in your area.

If you’d like more details, you can review resources such as “Permit to install an outdoor sauna in Minneapolis.

Regular maintenance includes cleaning the interior, checking and cleaning the heater, and ensuring proper ventilation. It’s also important to inspect and treat the wood exterior to protect against the elements.

If you need more information on this topic, please visit “How to take care of your outdoor custom sauna maintenance tips.

The position of your sauna should strike a balance between practicality, privacy, and good looks. By carefully designing and considering all of these features, you will increase the enjoyment and utility of your backyard sauna, transforming it into a true haven of relaxation and well-being.

If you need more information on this topic, please visit “How to choose the ideal spot for your backyard sauna.

The addition of a home sauna represents a strategic investment in both personal well-being and property value. By creating a sanctuary of relaxation and rejuvenation, homeowners can enhance the appeal, marketability, and overall worth of their properties. 

If you need more information on this topic, please visit “In-home saunas.”

Outdoor saunas in general last 15-25 years with proper care and maintenance.

If you need more information on this topic, please visit “How long will your outdoor sauna last?“.

If you are the type that likes to participate and be connected to the process, then wood fire is for you. If you’re looking to maximize the relaxation and convenience of a sauna, an electric one might be a good option. 

If you need more information on this topic, please visit “Electric or wood burning stove which is better for a sauna.”

A good home sauna will cost you anywhere from $22,000 to $40,000, and custom saunas can reach upwards of $50,000.

If you need more information on this topic, please visit “How much does a home sauna cost? A complete guide.”

BW Core Values

A legacy of craftsmanship & excellence.

In an industry where anyone and everyone seems to be building saunas to make a quick buck, we’ve stepped aside to invest solely in building the best-quality saunas money can buy.

Passion

We’re second-generation craftsmen with a genuine passion for sauna.

Creativity

We consider every detail, blending engineering with artistry.

Intentionality

Purposeful design means every choice has a purpose and function.

Grounded

It's not about looks and status. We build saunas meant to serve you.

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Fitting up to 3 people. The York model is designed to excel at cabin environments, all while maintaining an economical footprint.

Download Your BW 2026 Catalog

When you start exploring what a custom sauna could look like, you might already have that exact idea in mind: that perfect finish with a wide panorama window. Or something more true to its history, humbly nestled in the lakeside corner. Either way, we hope this catalog offers inspiration for your journey