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A LOCAL DEVISION OF:

Seattle's Premier Custom Sauna Builders for Wellness & Relaxation

Seattle Custom Sauna Installers -

Indoor, Outdoor and Infrared

Custom Sauna with steam

Discover the Power of Personalized Sauna Experiences

A custom sauna is a personalized heat therapy space, designed to meet your unique preferences in size, layout, materials, and heating system. Whether you're looking for a traditional indoor sauna, a backyard outdoor retreat, or a high-tech infrared model, custom saunas offer the flexibility to suit your lifestyle, wellness goals, and available space. Looking for sauna builders in Los Angeles? – find yours here.

At Seattle Custom Saunas, we design and install luxury saunas that blend modern functionality with timeless comfort. Every project is tailored to you. Looking for a Siding Contractor in Seattle? Try Renton Siding

Why Choose Seattle Custom Saunas?

Our Custom Sauna Services

Discover expertly crafted indoor, outdoor, and infrared saunas—designed and installed by Seattle’s trusted sauna specialists. We offer tailored solutions for residential and commercial spaces, including pre-built sauna installation. From urban homes to Pacific Northwest retreats, our team delivers long-lasting comfort, functionality, and wellness through custom sauna craftsmanship.

Checkout our Sauna installers partners in NYC Located here and sauna installer in Philadelphia!

Indoor Saunas
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Indoor Saunas

Designed to fit seamlessly into your home, our indoor saunas combine Pacific Northwest craftsmanship with durable materials and efficient heat systems. Whether built into a bathroom, basement, or home gym, we tailor every element to enhance comfort and maximize space—delivering a personal wellness retreat that lasts.

Infrared Saunas
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Infrared Saunas

Seattle homeowners and wellness seekers turn to us for custom infrared sauna installations that prioritize health, comfort, and energy efficiency. Our low-EMF infrared panels provide deep therapeutic warmth without overwhelming heat, perfect for relaxation, muscle recovery, and everyday detox in a modern, space-saving build.

Outdoor Saunas
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Outdoor Saunas

Create a rustic backyard escape or a sleek spa-like patio with a custom outdoor sauna built for Seattle’s unique weather. We use weather-treated wood, precise venting, and expert sealing to ensure long-term performance—installed by local professionals who understand the demands of outdoor living in the PNW.

Commercial Saunas
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Commercial Saunas

We work with Seattle gyms, spas, hotels, and wellness centers to design commercial saunas that are both functional and visually impressive. Our team builds durable, high-traffic-ready units with code-compliant features, ADA considerations, and finishes that reflect your business’s branding and wellness values.

Pre-Built Sauna Installation
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Pre-Built Sauna Installation

Have a sauna already delivered or ready for setup? We offer full-service installation of pre-built saunas, including placement, leveling, electrical, and venting. Whether it’s a barrel sauna or cabin-style unit, we make sure your new sauna is professionally installed and fully operational—ready for use in no time.

Premium Sauna Materials & Heating Options for Superior Performance

At Seattle Custom Saunas, every sauna begins with quality at its core. We hand-select the finest woods and advanced heating systems to ensure your sauna is not only visually appealing but also built for lasting performance. Our materials are chosen for their durability, aesthetic warmth, and ability to thrive in high-heat environments—so you enjoy beauty and function for years to come.

We partner with a Sauna Builder in Boston and a Sauna Installer in Atlanta

Best Wood Types for Sauna Construction

Choosing the right wood is essential for creating a sauna that maintains both form and function. Below are our most popular and reliable options:

Cedar: The Gold Standard for Saunas

Cedar remains the top choice for custom sauna builds—and for good reason. Naturally resistant to moisture, warping, and insects, cedar performs exceptionally well in high-humidity, high-temperature environments. Its rich, aromatic scent and warm red hue add a calming spa-like ambiance to any indoor or outdoor setting.

Benefits of Cedar:

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Naturally antibacterial and mildew-resistant

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Long-lasting without chemical treatment

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Aromatic and inviting

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Ideal for traditional or luxury designs

Hemlock: Sleek, Smooth & Hypoallergenic

If you're after a more modern aesthetic, hemlock delivers a clean, knot-free appearance and smooth grain. It's a great choice for clients who prefer a neutral tone or are sensitive to aromatic woods. Hemlock is durable, stable under heat, and offers a quiet elegance perfect for both home and commercial sauna installations.

Why Choose Hemlock:

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Hypoallergenic and low-scent

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Minimal grain for contemporary designs

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Stable and heat-resistant

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Pairs well with glass and metal elements

Spruce: Bright, Clean & Eco-Friendly

Spruce offers a natural, Scandinavian-inspired aesthetic with a light, airy tone. It’s an excellent material for minimalists or those seeking a soft, welcoming environment. In addition to its visual appeal, spruce is known for its sustainability and structural strength.

Top Features of Spruce:

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Light, bright color palette

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Eco-conscious sourcing

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Smooth finish and soft visual texture

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Excellent thermal insulation properties

Sauna Heating Systems We Offer

Whether you prefer the crackling ambiance of a wood-burning stove or the modern ease of infrared panels, we provide a wide range of heating systems to match your preferences and wellness goals.

Electric Sauna Heaters: Efficient & Easy to Use

Electric heaters are a go-to option for many of our Seattle clients thanks to their consistent heat output and ease of use. These units heat up quickly, require little maintenance, and are compatible with digital control panels that let you fine-tune your sauna experience with the push of a button.

Advantages:

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Fast heat-up times

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Adjustable controls

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Compact and space-saving

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Ideal for indoor installations

Wood-Burning Sauna Heaters: Traditional & Immersive

For a more authentic experience, wood-burning heaters deliver that rustic, nature-infused atmosphere many sauna lovers seek. Best suited for outdoor saunas, these systems create dry heat that envelops the body and mind. Plus, there's nothing quite like the aroma and crackle of real wood.

Why People Love Them:

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Natural heat source with no electricity needed

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Perfect for off-grid or backyard saunas

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Deep, enveloping warmth

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Traditional and timeless feel

Infrared Heating Panels: Modern Wellness Technology

Infrared saunas are becoming increasingly popular for their ability to provide heat that penetrates deeper into the body while keeping air temperatures lower. This makes them a favorite for wellness-focused users looking to support detoxification, pain relief, and relaxation—all while saving energy.

Infrared Benefits:

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Lower ambient heat, more comfortable sessions

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Supports detox, circulation, and recovery

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Quick start-up and energy efficiency

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Great for home wellness rooms

Hybrid/Combination Heaters: Best of Both Worlds

Combination heating systems offer unmatched flexibility. These hybrid units allow you to switch between infrared and traditional heat, or even introduce steam features, depending on your mood and needs. They’re ideal for shared spaces or commercial environments where users have different heat preferences.

Hybrid Features:

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Multiple heat modes in one unit

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Fully customizable experiences

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Suitable for families or businesses

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Future-proof investment for long-term use

Our Design & Installation Process

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FREE CONSULTATION

Start your sauna journey with a no-obligation consultation, where we take the time to understand your goals, space limitations, and personal preferences. Whether you already have a detailed vision or need help exploring options, our team is here to listen, advise, and guide you through the first steps.

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CUSTOM SAUNA DESIGN

Our design experts develop a comprehensive, tailored plan that reflects your unique style, space, and wellness goals. From layout and materials to heating systems and lighting, every detail is thoughtfully curated to deliver maximum comfort, efficiency, and aesthetic appeal.

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PROFFESIONAL INSTALLATION

Once your design is finalized, our experienced builders step in to handle the entire installation process with precision, cleanliness, and care. We stick to timelines, respect your property, and work with expert attention to detail—ensuring your custom sauna is delivered exactly as promised.

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SUPPORT &

Our relationship doesn’t end at installation. We provide continuous support, expert advice, and optional maintenance tips to keep your sauna running smoothly for years to come. Have a question or want to upgrade features down the line? We’re always just a call away.

TESTIMONALS

Evan M., Queen Anne

“Our indoor sauna fits perfectly into our home gym, and the quality is outstanding. The team was punctual, professional, and easy to work with. They took the time to explain every step and made sure everything was just right. A truly seamless experience from start to finish.”

Ashley T., Bellevue

“I’m so glad we chose Seattle Custom Saunas for our outdoor sauna. It’s beautifully built and holds up great in the rain. The cedar smells amazing, and the heat is perfect. You can tell they know what works in the Pacific Northwest climate.”

Sasha K., Shoreline

“We had a pre-built unit delivered and needed help setting it up. These guys handled everything—foundation, hookups, even final testing. It was up and running the same day, and they didn’t miss a detail. Truly the best service I’ve had from any contractor.”

Frequently Asked Questions

Whether you're new to sauna ownership or exploring the idea of building one at home or for your business, we've compiled a comprehensive FAQ to answer the most common and most important questions our clients ask. These insights are designed to help you make informed decisions and understand exactly what to expect when working with Seattle Custom Saunas.

Traditional vs. Infrared Sauna: What's the Difference?

A traditional sauna uses either electric or wood-burning heaters to warm the air, which then heats your body through convection. Temperatures typically reach 150–190°F and produce a dry, hot environment. A modern infrared sauna, on the other hand, uses infrared light to directly heat your body at lower air temperatures (110–130°F), offering a more gentle experience that penetrates deeply into muscles and tissues.

Infrared saunas are preferred by those looking for therapeutic benefits like detoxification, relaxation, or muscle recovery, while traditional saunas appeal to purists who enjoy high heat and intense sweating.

How much space is needed to install a custom sauna?

Saunas can be tailored to fit almost any space. The smallest models typically require as little as 4'x4', which is perfect for one or two people. Larger saunas for families or commercial use can take up an entire room or exterior structure. We assess your space during the consultation phase and create a design that maximizes functionality without sacrificing comfort.

Are infrared saunas proven to be healthy?

Infrared saunas have been the subject of growing research in recent years, with studies suggesting a variety of potential health benefits. While more long-term studies are still ongoing, many users and wellness professionals report noticeable improvements in:

Muscle recovery and joint pain relief

Improved circulation and cardiovascular support

Stress reduction and better sleep

Detoxification through sweating

Skin clarity and elasticity

Infrared saunas work by gently heating the body directly, rather than raising the air temperature like traditional saunas. This allows for longer, more comfortable sessions—making them ideal for daily use or for those sensitive to high heat.

As with any wellness technology, results vary by individual. If you have a medical condition, consult your healthcare provider before beginning infrared sauna therapy.

What materials are best for sauna interiors?

We recommend high-quality, thermally stable woods like:

Western Red Cedar: Aromatic, moisture-resistant, and ideal for most sauna builds.

Hemlock: Sleek, hypoallergenic, and modern in appearance.

Spruce: Light-colored, cost-effective, and traditionally used in Nordic designs.

These woods are naturally insulating and stay cool to the touch, even in high heat. They also resist warping and cracking over time, ensuring longevity and safety.

Where do you offer services?

We proudly serve the greater Seattle area and surrounding communities, including Bellevue, Kirkland, Redmond, Issaquah, Shoreline, West Seattle, Capitol Hill, Queen Anne, Mercer Island, and even select locations in Tacoma. If you’re unsure whether we cover your area, give us a call at (206) 207-5599—we’re happy to confirm and may still be able to accommodate your project.

How long does it take to install a sauna?

The full installation process typically takes 1 to 2 weeks for residential indoor saunas, once materials are ready. Outdoor or commercial saunas may take longer due to additional permitting or site prep. We provide a full project timeline up front and coordinate everything from design to final walk-through.

Are saunas energy efficient?

Yes. Modern electric heaters and infrared panels are designed with energy efficiency in mind. Most residential saunas cost less than $1 per hour to operate. Proper insulation, ventilation, and timers help reduce waste and optimize performance. We also offer energy-saving upgrades like LED lighting and smart controls.

Can I customize the features in my sauna?

Absolutely. At Seattle Custom Saunas, we offer a range of custom options including:

Bench layouts (L-shaped, tiered, or open seating)

Glass fronts and windows

LED and chromotherapy lighting

Built-in audio systems

Custom heater placement

Salt walls or aromatherapy dispensers

Your sauna will be designed to match your wellness goals, design style, and daily usage needs.

How often should I use my sauna?

Most users benefit from sauna sessions 3 to 5 times per week, depending on their personal health and goals. Sessions can range from 10 to 30 minutes. Always hydrate before and after use, and consult a medical provider if you have underlying conditions.

What’s included in a custom sauna quote?

Every quote from Seattle Custom Saunas includes design consultation, material options, heating system recommendations, installation timeline, and complete pricing breakdown. We tailor each estimate to your specific project goals, so you know exactly what to expect—no hidden costs, no surprises.