Bespoke steam rooms and saunas built to your space
Steam Room and Sauna Installation
Steam room and sauna installation covers building a bespoke steam or sauna enclosure within a property — including waterproofing, ventilation, seating and either a steam generator (for a steam room) or a sauna heater — designed around the specific space and specification rather than supplied as an off-the-shelf unit.
Definition
What Steam Room & Sauna covers
A steam room is a fully waterproofed, sealed enclosure heated by a steam generator producing wet heat at around 100% humidity, requiring careful tanking, sloped ceilings to manage condensation, and dedicated ventilation. A sauna uses dry heat from an electric or wood-burning heater and, while it doesn't need tanking to the same standard as a steam room, still requires suitable timber cladding, ventilation and an appropriate electrical supply for the heater.
Suitable for
- Homeowners with a suitable space — often a converted room, garden building or extended bathroom — for a bespoke steam room or sauna
- Steam room installations integrated into a luxury bathroom or wet room project
- Garden or outbuilding sauna installations
- Replacing or upgrading an existing steam or sauna unit
Not suitable for
- Spaces without adequate ventilation or an electrical supply that can be upgraded to suit — assessed on survey before design begins
- Off-the-shelf cabin sauna supply-only purchases where no installation or building work is needed — a bespoke build is the right approach when construction or waterproofing is required
Process
How the work is carried out
- 01
Design consultation
Discussing the space available, intended use, and whether a steam room or sauna (or both) suits the location and household.
- 02
Specification
Agreeing generator or heater capacity, ventilation strategy, and finishes, and confirming the electrical supply required.
- 03
Construction
Building the enclosure, including waterproofing and sloped ceiling for a steam room, or suitable cladding and ventilation for a sauna.
- 04
Fit-out and commissioning
Installing and commissioning the steam generator or sauna heater, controls and seating, and testing before handover.
Typical timescale
A bespoke steam room or sauna installation typically takes a small number of weeks on site, depending on the size of the enclosure and the extent of any building work needed to prepare the space — confirmed in your project programme after design.
Cost guidance
Steam room and sauna installations are bespoke, priced according to the size of the enclosure, ventilation and waterproofing requirements and the equipment specified, so we do not publish a guide price. We provide a written quotation after a design consultation.
Limitations and exclusions
- The electrical supply for a steam generator or sauna heater is installed or upgraded by a suitably qualified electrician
- Waterproofing (tanking) to a steam room is essential to its longevity and is specified and installed as part of the build, not treated as optional
Areas we cover
Steam Room & Sauna across Sussex, Surrey, Kent and South London
Local property styles, planning authorities and neighbourhood coverage for steam room & sauna in each town we work in.
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FAQs
Steam Room & Sauna FAQs
What's the difference between a steam room and a sauna?
A steam room uses wet heat from a steam generator at high humidity and needs full waterproofing, while a sauna uses dry heat from an electric or wood-burning heater and needs suitable timber cladding and ventilation rather than tanking. Which suits you depends on personal preference and the space available.
Can a steam room be added to an existing bathroom or wet room?
Yes, this is a common way to incorporate one, provided there's enough space for the enclosure, generator and ventilation — we assess feasibility as part of the design consultation.
How much electrical capacity does a sauna or steam room need?
It depends on the heater or generator size, which in turn depends on the enclosure's volume — larger enclosures need more power. We confirm the electrical requirement with a qualified electrician at specification stage.
Discuss your steam room & sauna project
Tell us about the property and what you have in mind, and we'll arrange a site visit.
Last reviewed 2026-07-28.