Build Your Own Sauna — With Expert Guidance
With 20+ years of Finnish expertise, we guide you through materials, layout, ventilation, and heat principles so your sauna performs like it should.
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Craftsmanship Rooted in Experience
Build the world’s best sauna with our help.

We’re a father-and-daughter team from Finland with decades of hands-on experience designing and building authentic saunas. Our mission is simple: to help homeowners create saunas that perform beautifully, last for decades, and improve your health — efficiently and effortlessly.
They + over 100 private sauna lovers trusted us
Why Choose an Authentic Finnish Sauna?
  • Build using time-tested Finnish principles
  • Understand how heat, air, and materials work in harmony
  • Create a sauna that’s healthy, durable, and energy-efficient
Why Most DIY Saunas Don’t Feel Right
  • Uneven temperatures
  • Humidity build-up
  • Poor air circulation
  • Short-lived, energy-wasting designs
Design Your Perfect Sauna
Starter:
Light Consultation
350 USD
  • 30–45 minute to review of your existing plans and documentation
  • Written recommendations and improvement suggestions
  • Guidance on next steps
  • Short follow-up by email or WhatsApp
Pro:
Custom Sauna Plan
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  • Full design package based on Finnish building and engineering standards
  • Complete layout with heater, bench, and ventilation positioning
  • Materials and insulation design
  • Technical drawings and build-ready documentation
  • Option for ongoing online support through your entire build
Elite:
Build Partner
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  • Ongoing virtual or on-site project supervision
  • Contractor coordination and quality assurance
  • Shop drawings, documentation, and compliance review
  • Continuous support from design to final handover
© 2025 Otsola Invest Oy · Business ID: FI28589996