Buying a Home Sauna in the UK: What to Know Before You Order

A home sauna is one of those things that sounds simple on a Sunday afternoon and becomes noticeably more involved once you start pricing electrics, planning a base and being honest about how often you would actually use it. It is worth working through the practical questions before choosing a specific model, because most disappointment with home saunas comes from decisions made in the wrong order rather than from the sauna itself.

This guide is deliberately a before-you-buy guide. It is not a full cost calculator, a running-cost breakdown or a planning explainer. What it will do is help you decide whether a home sauna is right for your house, your garden and your routine.

In this guide

• Quick comparison
• What buying a home sauna actually means
• Indoor vs outdoor home sauna
• Traditional vs infrared
• Space, access and placement
• Electrics, base and setup
• A short note on planning
• A short note on cost
• A short note on running costs
• When a home sauna is worth it
• When it may not be worth it
• Common mistakes before buying
• Simple buying checklist
• FAQ
• Final takeaway

Quick Comparison

Indoor vs outdoor home sauna

	Indoor sauna	Outdoor / garden sauna
Where it sits	Utility room, basement, converted spare room, home gym	Purpose-built timber cabin in the garden
Base / structure	Uses the existing room and floor	Needs a proper base and its own structure
Access	Straight from the house	Requires a walk outside
Ventilation	Needs to be planned into the room properly	Naturally simpler in a well-built outdoor cabin
Planning sensitivity	Usually not a planning issue, though room alterations may raise Building Regulations questions	Can often fall within Permitted Development if modest and well sited
Feel	Convenient, integrated, easy to use in bad weather	More of a ritual, more of a garden feature

Traditional (electric) vs infrared sauna

	Traditional (electric)	Infrared
How it heats	Heater warms stones and the air in the cabin	Panels warm the body directly
Temperature	Hotter, usually around 70–90°C	Cooler, usually around 45–65°C
Löyly	Yes, water on the stones is part of the experience	No, it is a drier kind of heat
Warm-up time	Often around 30–45 minutes	Often around 10–15 minutes
Power draw	Higher	Lower
Best for	Buyers who want a proper Nordic sauna experience and may use it with others	Buyers who want quick, quieter, lower-power sessions in a smaller footprint

Indoor vs Outdoor Home Sauna

Indoor sauna

Indoor saunas work best when there is a natural room for them: a utility, basement, converted spare room, garage conversion or home gym. Their biggest advantage is convenience. You do not have to step outside, and the whole thing becomes part of the house rather than a destination in the garden.

The trade-offs are mostly practical. Ventilation needs to be planned properly, the room has to cope with heat and moisture, and the installation has to make sense alongside the rest of the house.

Outdoor / garden sauna

Outdoor saunas work best when there is a spot in the garden that feels easy to reach and good to use throughout the year. Their advantage is character: a purpose-built timber cabin with its own sense of separation from the house.

The trade-offs are the walk outside on wet or cold evenings, the need for a solid base, and the extra decisions around privacy, access, siting and screening. If you are leaning that way, our guide on what makes an outdoor sauna feel relaxing in a UK garden is a useful companion read.

If you have both indoor and outdoor options, the most honest question is not which looks better on paper, but which one you will actually use in January.

Traditional vs Infrared: Which Suits Which Buyer?

Traditional sauna

This is what most people picture: a wood-lined cabin, a heater, stones, high temperatures and the option to pour water on the stones. It suits buyers who want the classic sauna ritual, may share the space with others, and value the immersive feel of a proper hot cabin.

Infrared sauna

Infrared works differently. The air stays cooler, warm-up is quicker and the power demand is usually lower. It suits buyers who want shorter, quieter, more individual sessions and who prefer a smaller or simpler setup.

Shared use

If the sauna will often be used by two or more people at the same time, traditional models usually make more sense. If the likely pattern is solo use, infrared may be enough.

The honest choice

Neither is universally better. The right choice depends on whether you want the classic sauna experience or a more convenient, lower-key heat session at home.

Space, Access and Placement

Footprint. A compact two-person outdoor cabin can sit on roughly 2 m × 2 m of base. Larger cabins, especially those with a changing area or more glazing, need more.

Clearance. Leave enough room around an outdoor sauna to maintain it properly. Around 600 mm on accessible sides is a sensible working guide. Tight against a fence may look neat at first, but it traps moisture and makes upkeep harder.

Access. Measure the narrowest point from the delivery route to the final location. Side gates, tight turns, steps and low branches can all matter more than the final footprint itself.

Placement. Closer to the house usually wins in the long run. The shorter and drier the walk, the more likely the sauna is to be used regularly through winter.

Privacy. A sauna overlooked from a neighbour’s kitchen or bedroom window tends to feel less inviting in real life than it did on a plan. Screening and orientation are much easier to think through before installation than after it.

Electrics, Base and Setup

Electrical supply

A traditional sauna heater typically draws between 3 kW and 9 kW, depending on the model and cabin size, and usually needs a dedicated circuit from the consumer unit. For outdoor cabins, that often means armoured cable running from the house to the garden. It is not something to run from an extension lead or to assume will be straightforward without checking first.

Before choosing a model, ask a qualified electrician two questions: does the consumer unit have spare capacity for the required circuit, and what is the realistic cost of the cable run to the intended location? Those two answers often shape the whole project.

Base

An outdoor sauna needs a level, stable, well-drained base. A concrete slab is usually the simplest and most dependable option, though other systems can work depending on the ground and the design.

The important point is not the material alone, but accuracy. If the base is out of level, doors and structure will tell you very quickly.

Ventilation and moisture

Outdoor cabins are naturally easier in this respect, provided they are properly built and not squeezed into damp corners. Indoor saunas need a room that is planned sensibly around heat, airflow and moisture rather than treated as an afterthought.

A Short Note on Planning

For many outdoor saunas on a standard house in England, a modest, sensibly sited cabin can often fall within Permitted Development, provided it meets the usual conditions on height, siting and coverage. That said, listed properties, designated land, front-garden locations and unusually large structures need more care.

This page is only a buying guide summary. If you need the legal detail, use our guide to planning permission for garden buildings in the UK and confirm anything borderline with your local authority.

A Short Note on Cost

This article is not the place to itemise full price bands in detail, because that is exactly what creates overlap with the dedicated cost page. The practical point here is simpler: the cabin price is rarely the whole project cost.

The base, the electrics, delivery conditions and any finishing work all belong in the budget from the start. For the proper breakdown, read our guide to how much a home sauna costs in the UK.

A Short Note on Running Costs

The main ongoing cost is electricity, and the main variables are heater size, session length, outside temperature and frequency of use. A small infrared cabin used for short sessions is a very different proposition from a larger traditional sauna heated several times a week.

If you want the numbers rather than the principle, our guide to home sauna running costs in the UK goes into that properly.

When a Home Sauna Is Worth It

Use will be frequent

If the sauna is likely to be used a few times a week, it has a much better chance of feeling worthwhile.

More than one person will use it

Shared regular use usually makes the investment easier to justify than a purely aspirational solo purchase.

It replaces something real

If it clearly replaces paid spa visits, gym use or another routine you already have, the project tends to make more sense.

The setup is already sound

Suitable space, workable electrics and a realistic location make all the difference between a smooth project and a difficult one.

If you are thinking about the sauna as part of a broader indoor or outdoor setup, our guide on planning a home wellness space with a sauna in the UK covers the wider picture without turning this page into a wellness-design article. If you are also comparing sauna-led options with other garden-based ways to unwind, it is worth looking at our outdoor hot tubs.

When It May Not Be Worth It

• Use would probably be occasional rather than regular.
• The garden is effectively closed for the season by late autumn.
• The electrical setup looks awkward or expensive.
• There is no sensible base location without major groundworks.
• The sauna is being bought to create a habit rather than support one that already exists.
• Only one person in the household is genuinely enthusiastic about it.

Common Mistakes Before Buying

• Treating the cabin price as the total project price.
• Skipping the electrician conversation until late in the process.
• Buying too small for realistic use.
• Buying too large for the way it will actually be used.
• Squeezing the cabin too close to a fence or wall.
• Choosing the site before checking the access route properly.
• Forgetting how much the winter walk from the house matters.
• Choosing between traditional and infrared without being clear about the experience you actually want.
• Assuming daily use without being honest about routine.
• Ignoring privacy until after the cabin is in place.

Simple Buying Checklist

Before you commit

• Have you decided indoor or outdoor, and traditional or infrared?
• Do you have a suitable space with proper clearance?
• Have you measured the delivery access route?
• Is the base location level, drained and workable?

Before you order

• Have you spoken to a qualified electrician about capacity and cable run?
• Have you budgeted for cabin, base, electrics and finishing work separately?
• Have you checked the planning position for your property?
• Is regular use realistic through winter as well as summer?

FAQ

What should you know before buying a home sauna?

Before choosing a model, decide whether you want an indoor or outdoor sauna and whether a traditional or infrared setup suits you better. Then check the practical basics: available space, delivery access, a suitable base, and whether the electrics can support the installation properly. Most disappointment with home saunas comes from decisions made in the wrong order rather than from the sauna itself.

Is an indoor or outdoor home sauna better?

Neither is universally better. An indoor sauna is easier to reach and tends to work well where there is already a suitable room with proper ventilation. An outdoor sauna usually feels more purpose-built and often creates a stronger sense of separation from the house, but it also needs a proper base, sensible siting and good year-round access. The better choice is usually the one you will actually use in winter as well as summer.

What is the difference between a traditional and an infrared sauna?

A traditional sauna heats the air using a heater and stones, reaches higher temperatures and gives the classic sauna feel. An infrared sauna uses panels to warm the body more directly, usually runs at a lower temperature and often heats up more quickly. Traditional suits buyers who want the full sauna experience, while infrared suits buyers who want a quicker, simpler and generally lower-power setup.

How much space do I need for a home sauna?

That depends on the number of people likely to use it and whether you are choosing an indoor or outdoor model. A compact two-person outdoor sauna can often sit on a base of around 2 m × 2 m, but larger cabins need more room and proper clearance around them. For outdoor installations especially, it is better to allow enough maintenance and access space than to push the structure too tightly into a corner.

Do I need special electrics for a home sauna?

In most cases, yes. Traditional sauna heaters often need a dedicated circuit from the consumer unit, and an outdoor sauna may require armoured cable to the garden. Some infrared models are simpler, but it is still worth speaking to a qualified electrician before ordering so you understand the practical setup and likely installation cost.

Does a home sauna need planning permission in the UK?

Often not, but it depends on the type, size and siting of the structure. Many modest outdoor saunas at the rear of a standard house in England can often fall within Permitted Development, provided the usual limits on height, placement and coverage are met. Larger structures, front-garden positions, listed properties and designated land need more care, so it is always sensible to check if anything looks borderline.

Is a home sauna worth it in the UK?

Usually yes, if it will be used regularly and the setup fundamentals are right. A home sauna tends to feel worthwhile when it fits naturally into household routine, when more than one person may use it, and when the space, base and electrics have been thought through properly. It tends to feel less worthwhile when it is bought mainly as an aspiration rather than for realistic regular use.

What affects the total cost of a home sauna?

The total cost usually includes more than the sauna itself. The main factors are the size and specification of the cabin, the type of heater, the base, the electrical installation, delivery conditions and any finishing work around the setup. In many cases, the base and electrics are the items buyers underestimate most at the start.

Are home sauna running costs high?

They vary depending on the heater type, sauna size, session length and how often it is used. A small infrared sauna used briefly a few times a week is a very different proposition from a larger traditional sauna heated for longer sessions. The key point is that electricity is the main running cost, so usage pattern matters as much as the equipment itself.

How often should a home sauna realistically be used to make sense?

There is no fixed rule, but most households who feel their sauna has been a good decision use it at least a few times a week. If it is likely to be used only occasionally, the cost per session can start to feel high and the space may end up underused. The more naturally it fits your real weekly routine, the more likely it is to feel worthwhile.