Everything you need to know about installing a sauna at home, from choosing the right type and location to understanding costs and maintenance.
Having a sauna at home means enjoying the benefits of heat therapy whenever you want, without gym memberships or spa visits. Whether you're considering a pre-built cabin, an infrared unit, or a custom-built room, this guide covers everything you need to plan your home sauna project.
These use a heater (electric or wood-burning) to warm rocks, creating the classic sauna experience with the option to add steam by pouring water on the stones.
Temperature range: 70-100°C (158-212°F)
Requires good ventilation and drainage
Can be built indoors or outdoors
Higher installation cost but authentic experience
Longer heat-up time (30-45 minutes)
Use infrared panels to directly heat your body rather than the air, operating at lower temperatures.
Temperature range: 45-65°C (113-149°F)
Easier installation—often plug-and-play
Lower running costs
Compact designs available for small spaces
Quick heat-up time (15-20 minutes)
Generate moist heat through a steam generator, creating high humidity.
Requires waterproof construction throughout
More complex installation
Higher maintenance requirements
Excellent for respiratory benefits
Requires proper drainage and ventilation
Modern electric saunas offer sleek design and convenience
Popular indoor locations include:
Bathroom conversion: Utilise existing plumbing and ventilation
Basement: Often has space and easy ventilation options
Spare room: Can be converted with proper insulation
Garage conversion: Good for larger traditional saunas
Loft space: Needs structural assessment for weight
Outdoor saunas offer unique advantages:
Garden cabin: Purpose-built structure
Converted shed: Budget-friendly option
Pool house integration: Convenient for contrast therapy
Barrel saunas: Attractive and efficient design
Most saunas require dedicated electrical circuits. Traditional electric saunas typically need:
220-240V supply for heaters over 4.5kW
Dedicated circuit with appropriate amperage
Professional electrician installation required
Infrared saunas may work on standard circuits
Proper ventilation is crucial for safety and comfort:
Fresh air intake near floor level
Exhaust vent near ceiling
Air should circulate but not create drafts
Prevents excessive moisture buildup
Effective insulation reduces running costs and improves performance:
Walls: R-12 to R-14 recommended
Ceiling: R-20 or higher (heat rises)
Vapour barrier essential to prevent moisture damage
Use appropriate materials rated for high temperatures
Budget ranges for different options:
Infrared cabin (2-person): £1,500-£4,000
Pre-built traditional sauna (2-4 person): £3,000-£8,000
Custom-built indoor sauna: £5,000-£15,000+
Outdoor barrel sauna: £4,000-£10,000
Full custom outdoor sauna cabin: £10,000-£25,000+
Additional costs to factor in:
Electrical work: £500-£2,000
Ventilation installation: £200-£800
Flooring modifications: £200-£1,000
Building regulations approval if required
Ongoing electricity costs: £15-£40 per month for regular use
Keep your home sauna in top condition:
Wipe benches after each use
Allow proper ventilation to dry between uses
Clean benches weekly with mild solution
Check heater elements annually
Replace sauna stones every 1-2 years (traditional)
Inspect wood for signs of damage or wear
In the UK, you may need planning permission for outdoor saunas, particularly if:
The structure exceeds certain size limits
It's in a conservation area
It's attached to a listed building
It significantly alters your property's appearance
Indoor conversions usually don't require planning permission but may need building regulations approval for electrical work.
A home sauna is a significant investment that pays dividends in health, relaxation, and property value. Take time to research your options, visit showrooms, and consult with professionals before making your decision. With proper planning, you'll enjoy the luxury of heat therapy in your own home for years to come.
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