Custom Indoor Saunas
Custom Indoor Sauna Design & Installation
in Boise
Transform a bathroom, basement, home gym, spare room, or dedicated wellness space into a sauna built around your home, your routine, and your vision.
A custom indoor sauna allows every inch of your space to be considered — from layout and wood selection to heater placement, glass, lighting, ventilation, and the way the sauna fits into the surrounding room.
Serving Boise Metro, Idaho & Eastern Oregon
Indoor Sauna Design
A sauna built around your space — not forced into it.
Indoor sauna projects require more than choosing a product and placing it in a room. The best results come from understanding the space, how it will be used, what construction details matter, and how the sauna should feel once it becomes part of the home.
At Les Bois Sauna & Leisure, we help guide the entire process — from the first conversation to the final walkthrough — so your indoor sauna feels intentional, functional, and built to last.
Ideal Spaces
Designed for the rooms you already have — or the wellness space you’re ready to create.
Indoor saunas can be designed into nearly any room of the home when the right details are considered early.
Primary Bathrooms
Create a spa-like retreat inside a primary suite with thoughtful planning around layout, waterproofing, ventilation, glass, and finish details.
Home Gyms
Add heat therapy to your training and recovery routine with a sauna designed to complement your fitness space.
Basements
Turn underused square footage into a dedicated wellness space with the right layout, materials, heater, and construction approach.
Wellness Rooms
Build a custom sauna into a larger recovery or relaxation space alongside cold plunge, red light, steam, or other wellness features.
Spare Rooms
Reimagine an unused room as a premium sauna environment designed around comfort, function, and daily use.
Luxury Residential Projects
Work with our team alongside your builder, architect, or designer to integrate a sauna into a broader custom home or renovation project.
Why Custom
More control over the layout, materials, and finished experience.
A custom indoor sauna is ideal when the space, finish level, or design vision requires more flexibility than a standard pre-built unit can offer.
Guidance
Every detail matters when the sauna lives inside your home.
We help you make confident decisions across the choices that shape how the finished sauna looks, feels, and performs.
Wood + Finishes
Choose from sauna woods such as cedar, hemlock, aspen, thermo-aspen, and specialty materials based on look, performance, and budget.
Heater Selection
Select the right heater based on sauna size, desired experience, performance goals, and budget — including premium options such as HUUM, IKI, Harvia, and other systems depending on the build.
Glass + Doors
Plan glass fronts, custom doors, and openings in a way that supports both the visual design and the function of the sauna.
Lighting + Controls
Consider mood lighting, under-bench lighting, ceiling puck lights, Wi-Fi controls, and other upgrades that shape the finished experience.
Ventilation
Proper ventilation supports comfort, heater performance, and the long-term durability of the sauna.
Waterproofing + Surrounding Conditions
Indoor sauna locations may require additional planning around bathrooms, wet areas, flooring, and surrounding construction details.
Built Correctly
Designed to look beautiful. Planned to perform properly.
An indoor sauna has to work with the home around it. That means thinking through electrical requirements, ventilation, adjacent materials, flooring, moisture conditions, and how the sauna will be used over time.
Les Bois Sauna & Leisure works with homeowners, builders, electricians, designers, architects, and project teams to help ensure the right details are considered before installation begins.
- Dedicated electrical planning
- Heater sizing and placement
- Ventilation requirements
- Material and finish coordination
- Glass and door planning
- Flooring and waterproofing considerations
- Collaboration with builders and designers
- Installation and final walkthrough
Indoor Sauna Inspiration
Warmth, detail, and craftsmanship in every decision.
Inspiration for the materials, lighting, glass, and finishes that shape a premium indoor sauna.
Light hemlock interior with backlit onyx window
Warm cedar galley sauna with facing benches
Pillar stone heater with cove LED lighting
Pillar heater and integrated thermometer
Long axial view down a traditional cedar sauna
Glass-front sauna integrated into the home
Bench, cove lighting, and heater
Bench detail with backrest pegs and armrest
Warm cedar interior with backlit onyx column
Corner bench geometry in light cedar
Backlit onyx feature panel
Pillar stone heater detail
Soft warm light on cedar back-wall benches
Wide custom indoor sauna in cedar
Warm pine interior with L-bench and pillar basket heater
Smoked-glass door opening from the bath into the sauna
Basket heater and aspen bench detail
Tiled anteroom with stained-wood door and digital controls
Inspirational imagery — representative of the finish level we work toward.
Process
From first conversation to finished indoor sauna.
A clear, guided path through the decisions that shape every indoor sauna project.
- 01
Consultation
We begin with your space, goals, budget, timeline, and vision for the sauna experience.
- 02
Space Review
We review the room, layout, surrounding conditions, and what needs to be considered before design and installation.
- 03
Design Direction
We help determine the right sauna layout, wood, heater, glass, lighting, ventilation, and finish details.
- 04
Proposal + Coordination
Once the direction is clear, we provide proposal details and coordinate next steps for measurement, product selection, fabrication, and scheduling.
- 05
Installation + Walkthrough
Your sauna is installed, tested, and reviewed with you so you understand how to use and care for the finished space.
Indoor Sauna Questions
Common questions before building indoors.
A few of the questions clients often ask before starting a custom indoor sauna project.
View All FAQsYes. Many indoor saunas are installed inside primary bathrooms, home gyms, basements, wellness rooms, spare rooms, and dedicated spa spaces.
Most saunas require a dedicated electrical circuit. Requirements vary depending on the heater size and sauna type, so these details are reviewed during planning.
Yes. Proper ventilation is important for comfort, heater performance, and long-term sauna durability.
Not always, but it depends on the location. Indoor saunas in bathrooms, wellness areas, or wet environments may require waterproofing considerations.
Most residential sauna projects range from $15,000–$50,000+, depending on size, materials, heater selection, glass, lighting, and whether the sauna is custom-built or modular.
Begin
Start your indoor sauna project.
Tell us about your space, goals, and vision. We’ll help you determine what’s possible, what details matter, and the best next step for your project.