BYSP Builds: Where Authentic Craft Meets Modern Living
At The Backyard Spa Project, we don’t build kits — we craft sanctuaries. Every BYSP sauna is designed and hand-built to the standards you’d expect in Finland 🇫🇮, not from a catalog. We focus on the details that matter: full insulation and vapor barriers to lock in heat and steam, proper ventilation to keep your sauna breathing, and wide, comfortable benches built for stretching, lying down, or gathering with friends.
Unlike pre-fab or barrel saunas, our builds are engineered to hold the true essence of löyly — the rich steam and deep heat that defines an authentic Nordic experience. We intentionally design with lower doors to create a “hot pocket,” ensuring warmth and moisture stay where they belong, even as guests come and go. The result is a sauna that heats faster, stays hotter, and delivers a more restorative cycle every time.
Each BYSP sauna is built one board at a time, using premium materials and timeless craftsmanship. From custom stains and layouts to lighting, ventilation, and stove selection, every detail is tailored to your space and vision. The outcome isn’t just a sauna — it’s your own backyard spa, a lasting space for connection, wellness, and ritual.
BYSP Builds start at $20,000 — an investment in health, tradition, and decades of shared experiences - Introductory prices for the first 3 builds, connect for details.
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5' by 5'
Great size cozy sauna for 2-4 people!
6' by 7':
Perfect for gatherings of 4-6 people, this cozy cedar sauna allows you to unwind in the company of friends and family.
8' by 6':
Spacious enough to comfortably seat 6-8 people, this larger cedar sauna is ideal for larger groups or those who appreciate a little extra space to stretch out.
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Every BYSP sauna is equipped with an IKI brand stove — the gold standard in authentic Finnish sauna heating. Choose between the timeless ritual of a wood-fired stove or the convenience of a WiFi-enabled electric unit.
Why IKI? Each stove is engineered with a large rock mass and a uniquely effective design that distributes heat evenly throughout the sauna. The result is a fully balanced, deeply restorative heat — the kind you’d expect in a world-class Nordic sauna.
For those who choose electric, the WiFi control option lets you program and even start your sauna remotely, so it’s ready the moment you are. Tradition, technology, and performance — seamlessly combined.
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Every BYSP sauna is finished with a standing seam steel roof, combining timeless design with unmatched durability. Unlike shingles or lightweight alternatives, standing seam panels lock together in continuous seams, creating a watertight barrier that stands up to the harshest weather conditions.
The benefits are clear:
Exceptional Longevity — a roof built to last 40+ years with minimal maintenance.
Weather Resistance — sheds snow and rain effortlessly while protecting against leaks.
Energy Efficiency — reflective properties help regulate temperatures and reduce heat loss.
Clean, Modern Look — sleek lines complement both natural and contemporary settings.
Strong, efficient, and visually striking — your sauna’s roof is built to perform as beautifully as it looks.
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Every BYSP sauna includes a privacy-tinted window to let in natural light without compromising comfort. From there, the design is yours to shape — window size and placement are fully customizable across all models. Choose from subtle accent windows, larger openings, or even a floor-to-ceiling glass wall that transforms your sauna into a stunning architectural feature.
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Every BYSP sauna includes a complete interior and exterior lighting package. Inside, fully dimmable under-bench lighting creates a soft, calming glow that elevates the sauna atmosphere. On the exterior, halo pot lights provide gentle, even illumination — extending the experience into the evening while keeping the mood relaxed and inviting.
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Every BYSP sauna is constructed with R14 Rockwool insulation and a full vapor barrier system to ensure superior heat retention and authentic steam. The insulation delivers faster heat-up times, lasting warmth, fire safety, and moisture resistance, while the vapor barrier locks in steam and prevents heat loss. Together, they create the stable, high-performing environment that defines a true Nordic sauna.
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Every BYSP sauna is built with a properly engineered ventilation system that ensures a steady flow of fresh air during each session. This circulation keeps the environment comfortable, safe, and energizing, while also allowing the sauna to “breathe” when not in use. By preventing excess moisture buildup, our ventilation system extends the life of your sauna and preserves the quality of the wood for decades of use.
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No two backyards — or sauna visions — are the same. That’s why every BYSP sauna is fully customizable, from the exterior stain and window placement to the lighting accents and stove selection. Whether you prefer subtle privacy windows or dramatic floor-to-ceiling glass, warm cedar tones or darker modern finishes, wood-fired tradition or WiFi-enabled convenience, your sauna will be tailored to reflect your lifestyle and personal style.
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Enhance your backyard spa with a seasonal outdoor shower, perfect for rinsing off between sauna rounds or after a cold plunge. Installed just outside your sauna, it provides a refreshing way to reset during the warmer months. Built with high-quality fixtures and simple connections, the shower is designed for easy use in spring, summer, and fall — but is not intended for winter operation.
Limited Build Availability
Each BYSP sauna is handcrafted with precision and care, taking 6-8 weeks to complete from start to finish. Because of the time and detail that goes into every build, our production slots are limited — ensuring each sauna receives the attention it deserves. Reserve your spot early to secure your custom backyard spa.
