BESPOKE SAUNAS LONDON

Bespoke saunas, engineered around the air you breathe

Every sauna we build in London starts with two questions most suppliers never ask: how will the air move, and how will the steam feel? Get those right and a sauna becomes the room you use every day. Get them wrong and you have an expensive hot cupboard.

Ventilation: the difference between heat and a good sauna

A sauna is a closed box with people breathing in it. Without a designed air path, CO₂ builds up, the air goes stale and sessions get cut short. We plan the air route before a single board is cut: fresh air enters low, near or beneath the heater, where it is warmed immediately; exhaust leaves on the opposite side so the heat rolls across the benches rather than short-circuiting to the ceiling. We size it for around six air changes an hour, and in basements, lofts and enclosed rooms we add mechanical extract or full climate control so the room stays fresh with the door shut.

Löyly: why heater sizing and bench height matter

Löyly is the soft wave of steam that rises when water meets hot stones — the heart of a Finnish sauna. It depends on stone mass, heater power matched to room volume (including extra allowance for glass and cold walls), and benches set high enough that your feet sit above the stones, where the heat is even. We specify the kiuas for your exact room, using HUUM, Harvia and other proven heaters, and set the upper bench about a metre below the ceiling so löyly reaches you as a gentle, enveloping heat rather than a sting on the ears. Read more about the science behind the sauna.

Built to the millimetre, in your space

Spare rooms, lofts, basements, under-stairs cupboards, WCs, garages and gardens — every sauna is built on-site in Thermo Aspen, alder, Nordic spruce or abachi, with a 3D design before work starts. Choose a range below, compare them side by side, or see what we've built across London and Surrey. We also build basement saunas, bathroom and en-suite saunas, sauna and cold plunge set-ups, and commercial saunas for hotels, gyms and health clubs.

Our bespoke sauna ranges

Which sauna is right for you?

Every range compared on how it heats, how it feels and what it costs. Prices are guide prices for a fully installed sauna.

Traditional Finnish sauna — from £9,995

Heat: Electric kiuas and stones · Temperature: 80–100°C, dry until water is thrown · Löyly: Yes, full löyly · Best for: Daily ritual, purists · Install: 3–5 days

Infrared sauna — from £9,995

Heat: Infrared panels · Temperature: 45–60°C, dry · Löyly: No · Best for: Small rooms, lower heat, quick warm-up · Install: 3–5 days

Garden / outdoor sauna — from £12,995

Heat: Electric kiuas · Temperature: 80–100°C · Löyly: Yes · Best for: Gardens, quick install · Install: 1–2 weeks

Wood-fired sauna — from £12,995

Heat: Wood-burning stove · Temperature: 70–100°C · Löyly: Yes, very soft · Best for: Off-grid garden ritual · Install: 1–2 weeks

Luxury home sauna — from £14,995

Heat: Embedded or bench-integrated kiuas · Temperature: 80–95°C · Löyly: Yes · Best for: Statement rooms, exotic timbers, LED · Install: 1–2 weeks

Red light therapy sauna — from £14,995

Heat: Infrared plus red / near-infrared LED · Temperature: 45–60°C, dry · Löyly: No · Best for: Recovery and skin · Install: 1–2 weeks

Hybrid sauna — from £14,995

Heat: Kiuas plus ceiling glass infrared panels · Temperature: 60–90°C, or infrared mode · Löyly: Yes, in Finnish mode · Best for: Flexibility, fast heat-up · Install: 2–3 weeks

Combi Bio sauna — from £16,995

Heat: Kiuas with water evaporator · Temperature: 45–65°C, 40–60% humidity · Löyly: Gentle and continuous · Best for: Families, anyone who finds Finnish too hot · Install: 1–2 weeks

Himalayan salt sauna — from £18,995

Heat: Kiuas plus backlit salt wall · Temperature: 70–90°C · Löyly: Yes (keep water off the salt) · Best for: Wellness design and ambience · Install: 2–3 weeks

Climate controlled sauna — from £17,995

Heat: Kiuas plus mechanical air and humidity control · Temperature: 60–100°C, sensor-managed · Löyly: Yes, the most consistent · Best for: Basements, larger rooms, heavy use · Install: 2–3 weeks

Steam room sauna — from £19,995

Heat: Steam generator · Temperature: 40–46°C, around 100% humidity · Löyly: n/a (wet steam) · Best for: Tiled spa bathrooms · Install: 2–3 weeks

Luxury outdoor sanctuary — POA

Heat: Bespoke · Temperature: Bespoke · Löyly: Yes · Best for: Full garden spa with cold plunge · Install: 4–8 weeks

See Sauna Prices London for what drives the cost of a bespoke sauna.

Bespoke saunas we've built in London & Surrey

WC converted to a sauna – Notting Hill — a full sauna in a former downstairs WC.

Under-stairs sauna – Clapham — a compact luxury build in dead space.

Thames-view sauna in a flat – Wapping — an apartment sauna with a river view.

Basement gym hybrid sauna – Virginia Water — hybrid Finnish and infrared, below ground.

Himalayan salt sauna – Weybridge — a backlit salt-wall feature sauna.

Glass-fronted pool house sauna – Oxshott — a sauna overlooking the pool.

Outdoor sauna – Holland Park — a garden sauna in central London.

Loft gym sauna & steam room – Walton-on-Thames — sauna and steam under one roof.

See all our sauna case studies

Start with a conversation

Tell us about your space — send a few photos and rough dimensions and we'll come back with what's achievable, a guide price and a design approach. Call 020 8058 0871 or use the form below.