Modern outdoor Finnish sauna complex with all the bells & whistles
Our most premium outdoor sauna design is defined by Scandinavian minimalism, panoramic glass walls, and the seamless integration of invisible smart technology. Modern high-end saunas prioritize authentic, sustainable materials like thermally treated wood and natural stone to create a "sanctuary" rather than just a heated room so our wellness facility designs also move away from traditional hidden boxes toward bold, geometric structures that serve as architectural focal points.
We incorporate as many of the the four essential sauna elements in our Benessere Premium Outdoor Sauna range as possible:
- The Hot Zone: A sauna with tiered seating for varied heat intensity and panoramic glass walls to connect with the landscape.
- The Cold Plunge: Positioned immediately adjacent to the sauna exit for traditional Nordic temperature cycling.
- Transition Anteroom: A weather-sealed changing area that acts as a thermal buffer, keeping heat in the sauna while providing a place for robes and smart controls.
- Social Lounge: A semi-enclosed terrace or deck featuring comfortable seating and a fire pit for post-session relaxation.
We try to use panoramic glass cabins with floor-to-ceiling tempered glass, connecting the user to nature while maintaining high energy efficiency. Dark-toned interiors, such as black thermo-ash, are used for creating a "smoke sauna" look, sometimes contrasted with light-colored aspen benches for dramatic effect.
We use latest technology with hybrid heating systems that combine traditional steam (electric or wood-fired) with full-spectrum infrared panels allow users to switch between intense heat and gentle recovery sessions, and indirect, dimmable LED strips placed under benches or behind backrests provide "wall-washing" light effects that can be adjusted for mood, such as energising morning light or soft evening glows.
A very popular addition to saunas now is Red light therapy (RLT) that boosts cellular energy by using specific red (600-700nm) and near-infrared (800-950nm) wavelengths to stimulate mitochondria, increasing the production of adenosine triphosphate (ATP). This surge in cellular fuel enhances repair, reduces inflammation, and promotes healing for skin, muscles, and chronic pain.
Planning your luxury outdoor sauna sanctuary
Designed as a sequence, not a shed
A sauna sanctuary works when the whole ritual has been thought through: where you change, where you heat, where you cool, and where you rest before going round again. We start with how you want to use the space — alone on weekday mornings or with friends on a Saturday night — and lay out the hot zone, cold plunge, shower, anteroom and lounge so each step is a few paces from the last, with privacy from neighbours and the best of the view.
Siting, planning and foundations
In England, most garden saunas and outbuildings fall under permitted development, provided they sit behind the front of the house, cover no more than half the land around it, and stay under 2.5m high when they are within 2m of a boundary. Listed buildings, conservation areas and larger structures need more care, and we check this at design stage. Every sanctuary sits on a proper base — a concrete slab or ground screws — with armoured power installed and notified under Part P, and water and drainage where a plunge or shower is included.
Wood-fired, electric or hybrid heat
Wood-fired stoves give the softest, most atmospheric heat and need no large electrical supply. Electric heaters are cleaner and controllable from your phone, so the sauna is hot when you walk out. Hybrid systems add ceiling infrared panels for gentler recovery sessions. We size every heater to the cabin volume and glazing so the löyly is soft and even.
The cold plunge
A sanctuary is not complete without cold water. We position the plunge immediately outside the sauna door, choosing between a chilled plunge tub that holds a set temperature year-round and a built-in plunge pool finished in stone or timber. Read more in our guide to sauna and cold plunge set-ups.
What a sanctuary costs
Because every sanctuary is designed for its garden, they are priced individually after a design consultation. The main cost drivers are the size of the building, the amount of glazing, the heater, the cold plunge and the landscaping around it. If you want a simpler standalone cabin, our garden saunas start from £12,995 fully installed.
Explore more outdoor saunas
Outdoor sauna and cold plunge guide. Garden saunas. Wood-fired saunas. Outdoor sauna installation – Holland Park, London.
Luxury Outdoor Sauna FAQ's
Do I need planning permission for an outdoor sauna?
In England, usually not, if it meets permitted development rules for outbuildings: behind the front of the house, no more than half the land around it covered, and under 2.5m high within 2m of a boundary. Listed buildings, conservation areas and larger structures may need permission, and we check this for you.
How long does a sauna sanctuary take to build?
Allow around four weeks for manufacture and delivery and around four weeks for the build on site, depending on groundworks, services and the plunge.
Can an outdoor sauna be used in winter?
Yes — winter is when most owners use it most. Our outdoor saunas are insulated and weather-sealed for the British climate, and a cold plunge is never more satisfying than on a frosty morning.
**Delivery 4 weeks, build time 4 weeks.