What Is a Garden Hub?
Why the garden became the new sanctuary.
A garden hub is an outdoor space designed for physical and mental recovery, typically combining a hot tub, a sauna, and a cold plunge or ice bath, arranged to support the daily rituals of contrast therapy, breathwork, and rest.
A few years ago a hot tub in the garden was a holiday-let prop. Today the same square of patio holds a sauna, an ice bath and a bench in dappled shade, and gets used four mornings a week. This is what changed, what people are actually building, and the four elements that turn a back garden into a daily ritual.
The garden stopped being scenery and started being infrastructure.
For a generation, the back garden was a place to look at, a lawn, a few flower beds, a table you used six weekends a summer. The garden hub reframes it as something you walk into every day, the way a kitchen or a study is. It earns its keep year-round because it changes how you sleep, recover and feel, not because it looks pretty in July.
It is the most quietly transformative thing happening to British gardens since the lawnmower, and it is being built one weekend at a time, by people who never thought of themselves as spa people.
Four numbers explain
why now.
The garden hub isn't a brand-new idea, Finnish gardens have looked like this for a hundred years. What changed in the UK was a stack of small economic, cultural and clinical shifts that all moved in the same direction at the same time.
Rise in UK searches for "outdoor sauna" and "garden hot tub" since 2019
More time spent in the garden post-2020 than the decade before
Median first-year cost of a hot-tub-and-cold setup vs ~£1,800/year for a couple's spa membership
Sessions per week required to move the cardiovascular and dementia curves, only realistic if it's in your garden
- Used roughly six weekends a year between May and September
- Maintained largely for resale value and kerb appeal
- Wellness happened indoors, at the gym, or at a hotel spa
- 3–5 sessions a week, 12 months a year, mostly after work
- Built around the daily routine, not the entertaining calendar
- Recovery, sleep and stress live ten paces from the back door
- Pays for itself in 12–18 months vs spa, gym and recovery costs combined
Numbers above are best-effort estimates from public datasets and our own customer base. Some are directional rather than precise, the trend is the point, not the third decimal place.
Four elements.
One loop.
A garden hub isn't a shopping list, it's a sequence. Heat, cold, water, quiet. You can start with any one of them, but the magic compounds when all four sit within ten paces of each other.
A hot tub or sauna, the anchor
Heat is the element people use most. A hot tub works year-round, low effort, social. A sauna is the deeper recovery tool, drier heat, longer sessions, more meditative. Most yards land on one or the other first; the converts often add the second within eighteen months.
An ice bath, the contrast
Cold is what makes a garden hub a garden hub, not a hot tub patio. Three minutes at 3 °C after a session in the sauna is the kontrastbad protocol Finnish bathers have used for centuries. The reason it works at home and not at a spa is proximity: when the plunge is a few steps from the heat, you actually do it, every session, every time.
A rinse, ideally outdoors
A simple outdoor shower or hose with warm water turns the loop from "run inside still wet" into a continuous experience. Nothing fancy required, a wall-mounted mixer plumbed off the kitchen tap is enough. The point is staying in the ritual, not breaking it.
A bench, a tree, a place to settle
The most underrated piece. After a contrast cycle you need ten minutes sitting still, eyes closed, no phone, for the parasympathetic system to fully take over. A simple bench under a tree or by a planted bed does it. The yard that ignores this part feels like a gym; the one that includes it feels like a retreat.
Six rules
the best yards share.
We've delivered to a thousand or so back gardens by now. The yards that get used four times a week, and the ones that get photographed once and then sit there, break down along these six lines almost every time.
Three sessions a week beats a perfect spa
The single biggest predictor of who actually gets the benefit is how many sessions land per week. A modest, well-located setup used four times a week outperforms a showpiece used twice a month. Build for the habit, not the photograph.
Heat and cold within ten paces
The protocol works because the cold is reachable wet, barefoot, in seconds. Place the ice bath beside the sauna or hot tub, not in the corner of the lawn. Anything more than ten paces and the contrast cycle becomes "after my next swim" forever.
Decking, porcelain or a level base
Grass between your wellness elements becomes a mud track inside a fortnight. Decking, porcelain pavers or even a self-levelling concrete pad is the upgrade most owners wish they'd done first. Slope away from the buildings, leave a strip for the cold-tub overflow.
Warm low-level lighting, no spots
The yard gets used in the dark for half the year. Avoid bright security floods, they kill the mood and wreck your melatonin twenty minutes before bed. A few warm-white wall washers or festoon strings at chest height is the right answer; it should feel like a sauna interior, not a car park.
Evergreens, ferns, low ornamental grasses
Planting around a hot tub or sauna does more than soften the look, it absorbs sound, holds moisture, and frames the bathing space so it reads as a room rather than equipment on a patio. Anything that handles steam (laurel, fern, miscanthus, pittosporum) earns its spot.
One trench, every cable, all at once
If a sparky is digging once for a 13 A spur, pay them to drop a 32 A cable, lighting feed and a heat-pump conduit at the same time. The marginal cost is small compared to the cost of a second dig in two years when you've added a sauna or upgraded the hot tub.
What it takes,
concretely.
The bits people ask in the kitchen before they decide whether this is a real plan or a fantasy. Honest defaults; everything is filterable from there.
- Where to put it
- Behind the kitchen, not at the bottom of the garden. The garden hub works because it's on the way to bed; if it needs a 200 m walk past the shed it gets used in summer only.
- How big a footprint
- Roughly 4 × 5 m of useable patio holds a 4-person hot tub, a single ice bath and the pacing space between them. Add 3 × 3 m for a small sauna cabin. Less than people assume, more than a single parking bay.
- Power requirement
- Plug-and-play hot tubs run from a 13 A outdoor socket. Premium tubs and Harvia sauna heaters above 6.8 kW want a dedicated 32 A circuit. Ice baths run from any 13 A. An air source heat pump halves the running cost on either heat element.
- Base prep
- Hot tubs need a level, load-bearing surface (paving slabs on a sand bed, decking with reinforced joists, or a concrete pad). Saunas the same. Ice baths only need level decking; the floor load is much lower because there's no insulation cabinet or pump pack.
The questions people send us before they buy.
What is a "garden hub"?
A garden hub is a back garden designed around a daily wellness practice rather than around mowing and entertaining. Most include at least one heat element (hot tub or sauna), one cold element (plunge or ice bath), and a quiet zone for cooling down, laid out so the loop from one to the next is a few steps, not a drive across town.
Why is the garden hub trend taking off now?
Three forces compounded: people spent a year reassessing their homes during the pandemic; longevity and recovery research went mainstream (Huberman, Attia, the Finnish cohort data); and the cost of getting to a spa three times a week stopped making sense once a home setup paid for itself in a year. The garden is the cheapest square footage you own, it became the obvious place to put it.
How much space do I actually need?
Less than people assume. A two-person hot tub plus a single ice bath and a small sauna fits in roughly 4 × 5 metres of usable patio, about the footprint of a parking space. The constraint is usually access (can the crew lift it in?) and a level base, not square footage.
Do I need planning permission?
In England, a hot tub, sauna or ice bath in a domestic garden is treated as an outbuilding under Permitted Development, generally fine without planning permission so long as it sits behind the front of the house, doesn't exceed 2.5 m in height where it's within 2 m of a boundary, and doesn't cover more than 50% of your garden. Listed buildings, conservation areas and AONBs have stricter rules; if you're in one, ask your council before ordering.
What's the realistic cost to set up?
A good entry-level garden hub, a quality plug-and-play hot tub plus an ice bath, sits around £6,000–£8,000 with delivery and crew install included. Add a sauna and you're typically £12,000–£16,000. The optional spend ladder runs higher (heat pumps, larger cabins, premium hot tubs), but the headline number is closer to "good used car" than "second mortgage".
Will the running cost wreck my electricity bill?
A well-insulated hot tub on a fitted cover runs around £30–£60 a month at current UK rates; a sauna used three times a week is £15–£25; an ice bath is the cheapest of the three. Add an air source heat pump to a hot tub and the heating cost drops by roughly 75%. The honest answer is that running costs are real but bounded, and well below the cost of a gym membership for two.
Where do I start if I've never owned any of this?
Pick the element you'll actually use three times a week and start there. For most people that's a hot tub (works year-round, social, low effort). Sauna is the next move once the habit is in. Ice bath last, it's transformative, but only after the heat habit is established, because the contrast is what makes the cold work.
The trend is the easy part.
The hard part is where to put yours.
Build Your Yard is the picker we built for exactly this, pair a hot tub, a sauna and an ice bath into a bundle, see the savings tier in real time, and get a single delivery date for the lot. £99 deposit holds it; balance 24 hours before delivery.