Indoor saunas
Traditional heater-and-stones saunas built to go inside the house, from compact two-person cabins to four-person rooms, and the electrical work they need.
The main trade-off
An indoor traditional sauna gives the hotter, steamier experience but almost always needs a hard-wired heater on its own circuit. In England a room containing a sauna heater is a "special location" under Part P of the Building Regulations, so new circuits and alterations there are notifiable. If you want to avoid that, look at plug-in infrared cabins instead.
Guides
Guides marked Ad are buying guides that contain affiliate links.
Ad Buying guide
Best indoor saunas for UK homes 2026: 6 traditional cabins compared
Traditional heater-and-stones saunas for inside the house, compared on size, heater, electrical supply and price, from £1,750 for two people. Prices checked 10 November 2026.
Costs
Sauna running costs UK 2026: cost per session at the current price cap
How much electricity a home sauna uses per session, worked out for 1.9kW infrared cabins up to 9kW heaters at the Ofgem cap of 26.32p per kWh, with every assumption shown.
Guide
Sauna electrical requirements UK: supply, Part P and what an electrician costs
What a home sauna needs electrically in the UK: dedicated circuits, 13A plug-in infrared cabins, 32A heaters, three-phase, Part P notification, BS 7671 Section 703, and typical installation costs.
Ad Buying guide
Best sauna heaters UK 2026: 9 electric and wood-burning heaters compared, from £409.99
Harvia, HUUM and Narvi sauna heaters from UK retailers compared on price, output, room size, controls and stones, with how to size a heater for your sauna. Prices checked 11 November 2026.
Guide
Infrared vs traditional sauna: price, heat, running costs and power compared (UK 2026)
How infrared cabins and traditional stove-heated saunas differ on temperature, purchase price, running cost, electrics and space, using UK retailer listings checked in November 2026. No health claims, just the practical differences.
Ad Buying guide
Harvia vs HUUM vs Narvi: which sauna heater brand? (UK prices 2026)
The three sauna heater brands UK retailers sell most often, compared on price, controls, stone capacity, wood-burning options and warranty, using retailer listings checked on 11 November 2026.
Work out the real cost first
Our calculator adds up the sauna, delivery, base and electrics, then shows what each session costs at today's electricity price. You can change every assumption.