Monocoque Sauna — Architect-Designed Cedar Wellness Cabin
The Monocoque Sauna is an architect-designed outdoor sauna and wellness cabin, conceived as a durable architectural object rather than a temporary product. Cedar shingle exterior, copper-wrapped outdoor shower, zinc roof. Compact enough for a garden, robust enough for a working holiday let. RIBA Chartered and ARB registered architect-led from concept to specification.
It builds on our Monocoque structural system, translating the same principles of longevity, craft and material clarity into a smaller wellness building..
What you can build on your land, you have been told, is unbuildable
Materials chosen for thirty years of weather
The exterior combines high-quality cedar shingles, chosen for their durability and how they weather over time, with a copper finish that wraps the building to form a sheltered outdoor shower while protecting the exposed edges of the structure. Above, a zinc roof forms a robust protective shell. The result is a building that requires minimal maintenance and improves visually as it ages — the cedar silvering, the copper patinating, the zinc holding its line.
These are the same material principles applied to the original Monocoque Cabin. Honest materials, chosen for ageing rather than newness.
A calm, immersive interior
Internally, the sauna is designed as a calm, immersive space. Natural materials and controlled lighting create a warm, restorative atmosphere. The compact footprint makes it suitable for a wide range of settings, from rural landscapes to suburban garden plots.
Planning permission for an outdoor sauna
Most clients want to know one thing first: do I need planning permission for a sauna in my garden? In most cases, no. The Monocoque Sauna is designed within the parameters of Class E permitted development — the rules covering outbuildings incidental to the enjoyment of a dwellinghouse — which means the majority of installations on residential properties do not require a planning application.
The standard caveats apply. Class E does not extend to properties in National Landscapes, conservation areas, the curtilage of a listed building, or where permitted development rights have been removed by an Article 4 direction. Properties in those settings, or installations exceeding the height and footprint thresholds, will need full planning permission. We work through the planning route as part of the engagement so the building is delivered to the site, not assumed onto it.
For commercial settings — adding a sauna to an existing holiday let, B&B, or rural tourism property — the position is different again. The sauna is read as ancillary to the principal use, but we recommend a Lawful Development Certificate or full application, depending on the site. This is a question we answer in feasibility, not at the planning submission stage.
Designed to last decades
The Monocoque Sauna is conceived as a durable architectural object, not a flat-pack product. Like the Monocoque Cabin — a 2023 Airbnb OMG! Grant winner selected from over 250,000 entries — it is built to last for decades and improve every one of them.
A revenue and experience upgrade for hospitality properties
The compact scale and flexibility make the Monocoque Sauna a natural companion to an existing holiday home, cabin, or short-term rental. For operators, the commercial argument is straightforward: an architect-designed sauna materially upgrades the guest offer, supports a higher nightly rate, and extends the booking season into the colder months when wellness becomes the headline feature rather than the garden.
This is the architect-and-operator perspective applied to a smaller building. The brief, the layout, the guest flow and the maintenance schedule are decided with the operator's eye, not just the architect's.