Award Winning & Globally Recognised Experts in Commercial Sauna & Steam Rooms
The Arc, Canary Wharf, London
This meticulously crafted, 65-person bespoke commercial sauna is at the core of an innovative communal wellness club, designed to bring people together through the principles of contrast bathing, relaxation, and social connection.
The Arc’s bespoke sauna combines contemporary design with traditional sauna heritage. Every element has been carefully chosen to ensure durability, elegance, and optimal heat distribution, creating an unparalleled wellness environment for its guests.
Tottenham Hotspur Training Ground
Our stunning commercial bespoke sauna installation Tottenham Hotspur Training Ground features warm golden brown coloured thermo alder interior and the noble soapstone cladded electric heater from Finnish manufacturer Tulikivi.
Durability and style with modern design elements were the priorities in this high-end sauna.
Shangri-La Hotel, The Shard, London.
Crafted a one-of-a-kind sauna at the Shangri-La Hotel, At The Shard, offering guests an unparalleled wellness experience. This bespoke design uniquely harnesses London's iconic cityscape, providing panoramic views as a breathtaking backdrop to the heat and steam. Our project elevates the traditional sauna, blending expert craftsmanship with the hotel's luxurious and elevated setting.
Art'otel, Battersea Power Station, London
This project showcases how we frequently collaborate with contractors,designers, and architects to foster strong client relationships and deliver the best possible result. We played a central and educational role as the authentic sauna specialists on this particular bespoke installation, which included a sauna and steam room.
First-Class Design & Installation
Each of our Bespoke Sauna Projects is designed and crafted at Finnmark's Headquarters in Spennymoor, Durham. Your dream sauna journey starts with conversations with our knowledgeable Sales Team, followed by a truly collaborative process with our Design and Installation Teams.
Recent Commercial Sauna Projects
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"A sauna, to me, is not just a structure, but a silent meditation on heat, timber, and light."
- Pete Elder, Head Of Design at Finnmark Sauna.
What we build: Our Custom Saunas
Every custom built sauna we deliver is driven by purpose: how it will be used, where it will live, and the experience it’s meant to create. These are the three core formats we build, each one shaped by what the client and the space actually need.
Bespoke Saunas for Home, Garden, and Commercial Spaces
Bespoke saunas are an investment in wellbeing, design, and daily ritual. At Finnmark, each custom sauna is built on site by our skilled sauna craftsmen. Tailored to the exact dimensions and character of your space, our saunas are constructed with millimetre precision, often over the course of a week.
While certain bench components are pre-crafted in our UK workshop, the sauna itself is brought to life where it will stand – making every build truly one of a kind.
FAQs
How much room do I need for one of your custom saunas?
We’ve designed small functional home saunas, and we've also built large multi-room wellness suites. The size depends on how many people will use it, how often, and the type of experience you’re after. During your consultation, we’ll assess the available space and recommend a layout that fits both the room and the way you want to use it.
Do bespoke saunas require planning permission?
Most indoor bespoke saunas don’t require planning permission, especially when installed within an existing room. For outdoor saunas, it depends on factors like size, location, and whether the structure is permanent. We’ll advise you early in the process if planning considerations apply and can liaise with your architect or contractor if needed.
What are the differences between electric and wood-burning heaters in a custom sauna?
Electric heaters are the most common choice – they’re efficient, low-maintenance, and compatible with modern Wi-Fi controls for added convenience. However, they do require a suitable electrical supply, which is essential for safe and effective operation. If your outdoor sauna location doesn’t have access to an appropriate power supply, a wood-burning heater will be necessary.
Wood-burning heaters offer a more traditional, sensory sauna experience, but they do require additional planning – including flue installation, regular access to firewood, and ongoing cleaning and maintenance.
The choice often comes down to ritual: do you want the convenience of instant heat at the press of a button, or the slower, more tactile rhythm of building and tending a fire? We’ve designed and installed both, and we’ll guide you toward the best option for your space, routine, and energy setup.
What’s the typical lead time for a sauna design and build project?
It depends on the scale and specifics of the project, but most sauna design and build timelines fall between 12 and 16 weeks. That includes design development, material preparation, workshop build time, and scheduling installation. Once we’ve seen your space and understood the brief, we’ll give you a clear, realistic timeline. Please note, our installation calendar can vary throughout the year, so please speak with our sales team as soon as possible to understand our current lead times.
Why choose a custom build sauna
Bespoke saunas offer far more than visual appeal. They solve problems standard kits can’t, and elevate the experience in ways that matter long-term. Here’s what you gain when you choose a bespoke sauna with Finnmark:
- Built Around Your Space: Unlike many bespoke sauna providers, simply installing a modular unit and cladding around it, our saunas are genuinely made to measure - designed and built to the millimetre of your exact space. Whether it's a compact utility room or a wide-span basement, there are no visible fixings, no awkward gaps, and no compromises. Ventilation is tailored to the unique characteristics of your room, ensuring seamless integration and optimal performance from the start.
- Total Design Freedom: Layout, benching, lighting, doors, access – nothing is pre-decided. Want tiered benches in thermo-aspen? Lighting behind backrests? A frameless glass wall or traditional solid timber door? We’ll design it around how you use the sauna, not what’s convenient to install.
- Performance-Grade Materials: We don’t use generic cladding or joinery timber. All linings are made from low-knot and low-resin Nordic hardwoods and softwoods – like alder, aspen, and thermo-treated variants. Each selected for their ability to perform under heat and humidity.
- Purpose-Led Engineering: A family sauna used twice a week isn’t built the same way as a commercial unit running 12 hours a day. Every component, from insulation and vapour barriers to ventilation and heater output, is specified to suit the actual use case. The result: stable temperatures, balanced heat, and a system that performs flawlessly in its environment.
Our Process: From Vision To Reality
Every one of our custom saunas starts with a conversation. That first dialogue informs every decision that follows, from layout and materials to heat performance and final installation.
- Consultation: We ask the right questions early: usage, layout, airflow, electricity supply and access. This ensures the design responds to the real conditions it will be working with.
- Design Collaboration: Your vision becomes a build-ready plan with full technical drawings, material specifications, and practical guidance throughout.
- Material Selection: We work with the highest-performance components available. With our guidance, you’ll choose from Nordic softwoods, commercial-grade insulation, and proven heaters – all selected to meet the demands of your brief.
- In-House Build & Installation: Every sauna is handcrafted on site by our experienced team of experts, tailored to the exact dimensions of your space. Precision-built to the millimetre and installed by our dedicated team, no two saunas are ever the same.
Aftercare & Support: We leave you with an exceptional wellness space, and the knowledge to keep it that way. We offer ongoing sauna care, usage guidance, and optional maintenance contracts to keep everything performing as it should, year after year.
Not sure if bespoke saunas are right for you?
Not every project needs a full custom built sauna, but that doesn’t mean a flat-pack kit is the answer either. Our Design and Materials Package is ideal if you're planning a self-build or working with a trusted local contractor.
For a one-time fee of £1,440, you’ll receive a fully personalised sauna design pack created by our in-house experts. It includes tailored drawings, material specifications, heater guidance, and ventilation plans – everything you need to build a sauna to Finnmark standards.
You still get access to the same premium sauna materials and expert insight, just delivered in a format that suits your budget and build approach.
Start Your Sauna Project
Tell us a bit about your project – a member of our bespoke sauna team will follow up to explore your vision and guide your next step.