SAUNA & COLD PLUNGE

Sauna & Cold Plunge — Contrast Therapy at Home

Heat, then cold, then rest. Moving between a hot sauna and cold water is the oldest recovery ritual there is, and it is now one of the most requested additions to London homes. Done well, a sauna and cold plunge are designed together as one space, so the walk from heat to cold takes a few steps and the cold water is ready whenever you are. The Sauna Company designs and builds both: bespoke saunas from £9,995 fully installed, with the cold plunge specified and priced for your space.

Why pair a sauna with a cold plunge

A sauna raises your core temperature and heart rate; cold water then drives a sharp return. Regular users describe deeper relaxation, better sleep and faster recovery after training, and many simply find the contrast makes the ritual more satisfying. It also changes how you use the sauna: shorter, hotter rounds with a cold reset in between, repeated two or three times.

Choosing your cold plunge

There are three main routes. A chilled plunge tub uses a dedicated chiller with filtration and sanitation to hold water at a set temperature, typically somewhere between 3°C and 12°C, and is the most practical option for most homes. A built-in plunge pool is tiled into the floor or terrace for a seamless, architectural finish and suits new builds, basements and garden spa projects. A cold shower or bucket shower is the simplest and most space-efficient option where a plunge will not fit. We will recommend the right one for your space, budget and how cold you like it.

Designing the space around the ritual

The sauna, plunge, shower and somewhere to rest should sit together, with non-slip floors, good drainage and enough ventilation to handle both heat and moisture. Indoors, we plan the extract and the vapour control so the room stays dry. Outdoors, we position the plunge for privacy, sun and easy access from the sauna door, and protect the chiller and filtration from the weather.

Indoor or outdoor

Garden saunas with an outdoor plunge are the classic set-up and work beautifully year-round in the UK. Basement and pool-house projects can bring the whole contrast circuit indoors, alongside a gym, steam room or pool. Either way, every project starts with a 3D design so you can see the layout before work begins.

Where to start

Explore our garden saunas, basement saunas and luxury outdoor sauna sanctuaries, or send us a few photos and rough dimensions and we will suggest what is achievable.

Sauna & Cold Plunge FAQ's

What temperature should a cold plunge be?

Most home users plunge at somewhere between 3°C and 12°C. Colder is not necessarily better; many people settle around 8–10°C. A chilled plunge tub lets you set and hold the temperature you prefer.

How long should you stay in the sauna and the plunge?

A common routine is 10–15 minutes in the sauna, a short cold plunge of around 30 seconds to two minutes, then a rest, repeated two or three times. Start gently and build up, and take medical advice first if you have any heart or blood-pressure condition.

How much does a sauna and cold plunge cost?

Our bespoke saunas start from £9,995 fully installed. The cold plunge is priced per project because it depends on the type, chiller size, finish and installation. We give a combined fixed quote once we have seen your space.

Can a cold plunge go indoors?

Yes, provided the floor, drainage and ventilation are designed for it. Indoor plunges sit well in basements, pool houses and home spas next to the sauna and shower.

Does a cold plunge need to be filtered?

A plunge you keep filled needs filtration and sanitation, typically a filter with UV or ozone treatment, to keep the water clean between changes. Chilled plunge tubs usually include this; built-in plunge pools have it designed in.

Sauna Prices (cold plunge priced per project)

*Prices include:

• FF-PIR Sauna Insulation
• Sauna Vapour Barrier & Joining Tape
• ALDER / ASPEN Sauna Wall Panelling with Discrete Mounting Clips
• ALDER / ASPEN Sauna Bench Timber
• One or Two Sauna Headrests (depending on sauna size)
• Ceramic Sauna Light with Frost Diffuser
• Standard Sauna Door with Wooden Door Knob (specify left or right opening)
• Wall Mounted or Free Standing Sauna Heater with Built in Controls
• Sauna Thermo-Hygrometer

**Installation excludes preparation work or builders work (to be done by others based on our drawings)

***ALL PRICES EXCLUDE VAT