Experience the authentic Finnish sauna tradition without leaving home—custom-crafted to fit your space, lifestyle, and wellness goals.
Imagine stepping from your busy day into the gentle heat of your own Finnish sauna, where stress melts away and deep relaxation begins.
Here in Minnesota, we understand that a sauna isn’t just a luxury—it’s a way of life, a daily ritual that transforms both body and mind.
Your custom indoor sauna becomes more than a room; it becomes your personal sanctuary, perfectly integrated into your home and tailored to deliver the authentic sauna experience you deserve.
As insured Minnesota sauna experts with Finnish heritage, we’ve built or sold over 250 saunas. With 50+ five-star Google reviews and a showroom where you can experience authentic Finnish sauna firsthand, we’re proud to be Minnesota’s most trusted sauna builders—transforming homes one beautiful sauna at a time.
Every custom sauna we build reflects decades of Finnish tradition combined with your unique vision.
From the moment you step through the door, you’ll experience the difference that true craftsmanship makes—in the gentle aroma of premium woods, the perfect distribution of heat, and the countless details that transform a simple room into your personal retreat.
Here’s what makes our custom indoor saunas exceptional:
Work directly with our highly-trained craftsmen to create a sauna that fits your exact space and vision.
Every detail is customizable, from the smallest 2-person retreat to a spacious family sauna room, ensuring your investment perfectly matches your home’s architecture and your wellness goals.
Choose from 8 hand-selected, sustainably sourced wood species that stay cool to the touch (knots get hot in the sauna so we only use knot-free benching/ backrests, but do offer knotty walls and ceiling boards).
Our clear western red cedar, Nordic spruce, thermo-aspen, and other premium woods are chosen specifically for their ability to withstand decades of sauna use while maintaining their beauty and structural integrity.
The modern convenience of the traditional Finnish sauna is Wi-Fi and app capabilities so you can power your sauna from the living room, your office, or the grocery store so it will be ready when you are.Â
Non-Wi-Fi electric sauna heaters are available if you choose.Â
Built with time-tested Finnish construction methods that ensure decades of daily use.
Our attention to detail, from proper ventilation to moisture barriers, means your sauna will provide wellness benefits for years to come.Â
Choose from Wi-Fi enabled or traditional controls with properly sized heaters for optimal performance.
We calculate the exact BTU requirements for your space, ensuring quick heat-up times and consistent temperatures while minimizing energy costs.
Professional installation by our master builders or detailed DIY support.
Whether you want turnkey installation or prefer to build it yourself, we provide the exact level of support you need for success.
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Create a daily ritual that improves cardiovascular health, reduces stress, and enhances sleep quality.
Your custom sauna becomes the cornerstone of a healthier lifestyle, providing proven benefits that compound with regular use.
Note only that, but a sauna can increase your home’s appeal to potential buyers—but the real value starts immediately with daily health benefits, stress relief, and family wellnes that you’ll enjoy for years before any resale consideration.
When you buy a modular sauna from an online-only retailer, you’re on your own.
When you purchase from us, you get a partner. Have a question? Call us at 612.505.9700.
Need a hand with installation? We offer professional installation services.
Want to see the materials firsthand? Visit our Minnesota showroom. We’re here to ensure your success.
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Your sauna should be as unique as your reasons for wanting one.
At Sauna Supply Company, we don’t just sell saunas; we help you craft a personal sanctuary.
Each of the following options allows you to tailor the look, feel, and performance of your sauna to your exact preferences. We’re here to guide you through every choice.
More than just dimensions, the size of your sauna defines its purpose. Are you seeking a private space for solo meditation, or a social hub for family and friends? We’ll help you match the footprint to your lifestyle. Here are some common sizes.
The heater is the engine of your sauna. Your choice determines the character of the heat and steam (löyly). We offer 5 brands of exceptional heaters to power your experience. Below are the three most popular heaters we offer.Â
The wood defines the sauna’s ambiance—its look, its feel, and its scent. We use only premium, furniture-grade woods that are beautiful, durable, and create the perfect environment for relaxation.
All our wood is mill-direct, using only the highest quality, hand-selected wood. All from verified sustainable forests. All wood choices are chosen for their ability to hold up for years (typically decades) in the harsh sauna environment.
All wood that touches skin (benches, backrests, duckboard flooring, heater guard, headrest) is chosen for staying cool to the touch of the skin (knots get hot in the sauna!)
Interior Wood Types Available :Â
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Exterior Wood: The exterior panels can be finished with the same beautiful woods to create a seamless, standalone sauna. Wood types can be mixed and matched to fit your style and budget.
Don’t overlook the details that deliver true comfort. A well-designed backrest transforms a bench from a simple seat into a comfortable lounger, providing essential ergonomic support for your mid-back and shoulders, allowing for longer, more relaxing sessions.
Each custom Sisu sauna comes with a standard 2-bar backrest. There are upgraded backrest versions available.
The right lighting is crucial for creating a truly relaxing atmosphere. Move beyond a simple bulb and create a soft, tranquil glow. We offer a range of modern lighting solutions, including LED light strips installed behind the backrests or underneath the benches to wash the walls with warm, indirect light—perfect for enhancing a state of deep relaxation.
LED strip lighting comes pre-installed behind your backrest. Can also be placed under bench.Â
Cariitti glass fiber lighting can be installed in the ceiling or on the backrest to create a halo effect.Â
Puck Lights go into the ceiling.
Globe Light mounts on the wall.Â
Your sauna door sets the tone for the entire room. We offer high-quality options to match your desired aesthetic and level of privacy.
Our standard sauna window comes in a single pane, tempered glass. We do offer double pane windows. They’re available in both clear and bronze tint. All windows pre-hung in the panels.Â
Below are our standard sauna window sizes in the custom sauna. We can do entirely custom window sizing if the below options are not what you’re looking for.
Window Sizes:Â
Comfort and cleanliness start from the ground up. A duckboard walkway (in Finnish, ritilä) provides a beautiful, slip-resistant surface that feels warm and comfortable underfoot. It keeps your feet off the main floor of your home and is easily removable for cleaning.
A duckboard walkway comes standard with each sauna kit. Duckboards sit on the floor of the sauna and are walked on.Â
Duckboards usually are built in the primary wood species of the sauna.
An additional duckboard can be purchased for outside of the sauna (entryway, etc). Â
For a truly seamless and professional look, consider adding a skirt to the upper bench.
This panel cleanly closes the gap between the upper and lower benches, hiding the bench supports and creating the elegant, finished appearance of a high-end custom-built sauna.
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View our Custom Indoor Sauna Gallery below. For additional sauna images visit our sauna gallery page here.
We believe in giving our customers options. Whether you’re a hands-on DIYer or you’d prefer to sit back and have us handle everything, we have a path for you.
For the ultimate peace of mind, let our in-house team of professional sauna builders handle the entire installation. This isn’t a third-party service; it’s our own expert crew ensuring your investment is assembled to perfection.
Choosing our White-Glove Installation means you can relax, knowing the job is done right, done efficiently, and backed by our company’s reputation.
If you’re comfortable with tools and enjoy a project, this is an incredibly rewarding option.
While we handle the complex details, a little preparation ensures your sauna installation goes smoothly. Most of our customers are surprised by how simple the process is—here’s what you need to know to get your space ready for transformation.
Electrical Requirements
Your sauna will need 220V/240V electrical service, similar to an electric dryer or stove. We’ll provide the heater manual beforehand for your electrician to ensure the wiring is sufficient. Most homes already have adequate electrical capacity, but we’ll confirm this during consultation.
Framing & Insulating
If you are converting a pre-framed and insulated space into a sauna, ensure that there is no drywall on the walls and ceiling. We do offer framing & insulating for custom saunas—ask if this is something you will need. Â
Ventilation Planning
Proper ventilation is crucial for comfort and performance of the heater. Ideally each custom indoor sauna vents into an open area with good air circulation.Â
Moisture Protection
Although our saunas are designed with excellent moisture control, consider the surrounding area. If installing on a concrete basement floor, no additional prep is needed. For installations over finished flooring, we recommend moisture-resistant materials near the sauna entrance where you’ll step out after sessions.
Day of Installation
Our professional installation typically takes 2-3 days. We’ll need access to the space and electrical power for tools. If you’re choosing DIY installation, set aside a couple of days and recruit a helper—while one person can manage it, having an extra set of hands makes the process more enjoyable.
Your perfect home sauna is just a conversation away. Whether you have detailed plans or just a dream of better wellness, our team will guide you through every decision, ensuring your custom indoor sauna exceeds expectations while fitting seamlessly into your life.
Use the contact form to get started.
Prefer to talk? Call us at 612-505-9700 to discuss your sauna dreams with one of our sauna specialists.
Each custom sauna requires a dedicated 240V circuit. The specific amperage depends on the heater size (e.g., a 4.5 kW heater typically needs a 30-amp circuit). All electrical work must be performed by a licensed electrician to ensure safety and code compliance. We can provide the specific electrical requirements for the model you choose.
Most residential saunas cost $1-3 per session in electricity—less than a trip to a commercial spa. With proper insulation and an appropriately sized heater, your sauna heats up in 30-45 minutes and maintains temperature efficiently.
This is where our expertise shines. We’ll evaluate your space, discuss how you plan to use your sauna, and recommend the optimal size. Generally, allow 2 feet of bench space per person, but we also consider ceiling height, heater placement, and traffic flow. We will guide you through the process.
Quality shows in every detail—from woods that stay beautiful for years to high-quality heaters. Our saunas are built by craftsmen who use saunas daily and understand what makes the difference between adequate and exceptional. Add our local support, proven track record, and the ability to see examples in our showroom, and the value becomes clear.
Typically 6-10 weeks from approved design to installation, though timing varies by season. Once we start building the sauna we typically complete the job in 2-3 days. We keep you informed throughout the process.
Almost anywhere! We’ve built saunas in basements, spare bedrooms, master suites, attics, garages, and even large closets. The key requirements are adequate space (minimum 4’x4′), access to 220V electrical service, and proper ventilation. Our team excels at creative solutions for challenging spaces.
If you have other questions or need specific information, don’t hesitate to ask. We have years of sauna experience and will help you with what you need.
We’re not just sauna dealers—we’re sauna users, builders, and enthusiasts with Finnish roots and Minnesota values. Our team brings together old-world craftsmanship with modern efficiency, creating saunas that honor tradition while exceeding contemporary expectations.
With over 200 saunas built and sold, 45+ five-star reviews, and a showroom where you can experience authentic sauna before you buy, we’ve earned our reputation through quality and service. We’re not the cheapest option, nor the most expensive—we’re the best value, delivering premium saunas at fair prices with unmatched local support.
Our master builders take pride in every detail, from the first measurement to your first löyly. When you choose Sauna Supply Company, you’re not just buying a sauna—you’re joining a community of Minnesotans who understand that some of life’s best moments happen at 180°F.
Our sauna specialists offer personalized guidance and expert recommendations tailored to your space, budget, and wellness goals.
Submit the form, and we’ll be in touch to discuss your project.
The Sisu Sauna is a great choice for straightforward installation and flexible customization. Submit the form, and a sauna specialist will reach out shortly to discuss your project.
Submit the form to get a quote, ask questions, or receive expert guidance from one of our sauna specialists.
