You’ve bought the hot tub — or you’re about to — and now comes the question that determines whether you love it or regret it: where does it actually go? Get the location wrong and you’re dealing with a sinking base, sky-high electricity bills, no privacy, or worse, a £6,000 tub you can’t use because the electrician says the cable run is impossible. I’ve helped three friends plan their hot tub installations, and the location decision caused more headaches than choosing the tub itself. Here’s everything you need to consider.
In This Article
- Why Location Matters More Than You Think
- The Base: Getting It Right
- Electrical Supply and Access
- Privacy and Screening
- Wind, Shelter and Weather Exposure
- Access for Delivery and Maintenance
- Drainage and Water Supply
- Distance from the House
- Planning Permission
- Common Location Mistakes
- Frequently Asked Questions
Why Location Matters More Than You Think
A hot tub weighs 1,500-2,500kg when filled with water and people. That’s the weight of a small car sitting in your garden, permanently. The ground beneath it needs to handle that load without shifting. The electrical supply needs to reach it safely. You need to be able to drain it, maintain it, and get in and out of it without giving the neighbours a show.
The Costly Mistakes
Most hot tub installation problems come from choosing the location based on where it looks best rather than where it works best. The patio that catches the evening sun might be too far from the consumer unit. The decking that overlooks the garden might not support the weight. The corner by the fence might flood every time it rains. Think practically first, then adjust for aesthetics.
The Base: Getting It Right
This is the single most important decision. Get the base wrong and the tub will settle unevenly, crack its shell, and void the warranty.
Concrete Pad
The gold standard. A reinforced concrete pad at least 100mm thick, level to within 5mm across the entire surface, and extending 300mm beyond the tub edges on all sides. For a standard 2m x 2m tub, you need a pad of roughly 2.6m x 2.6m.
- Cost: about £500-1,200 depending on access and ground preparation
- Pros: strongest option, handles any weight, permanent, level
- Cons: permanent (you can’t easily move the tub later), requires curing time (7+ days)
Reinforced Paving Slabs
Large-format paving slabs (600mm x 600mm minimum) on a compacted hardcore and sand base. This works well for most domestic hot tubs if laid properly. The Building Regulations guidance for hard standing covers the standards for load-bearing outdoor surfaces.
- Cost: about £300-800
- Pros: cheaper than concrete, removable, good drainage between slabs
- Cons: must be perfectly level, can shift on clay soil, needs professional laying for heavy tubs
Existing Decking
Decking almost never works without reinforcement. Standard garden decking is designed for foot traffic (about 150kg/m²), not the 300-500kg/m² a filled hot tub exerts. You need structural-grade joists at closer centres and posts on concrete pads. Get a structural engineer or experienced carpenter to assess it — not a general builder who “reckons it’ll be fine.”
What Doesn’t Work
- Bare soil or grass — will sink unevenly, causing shell stress and cracks
- Gravel — shifts under weight, impossible to level properly
- Standard decking without reinforcement — will sag or collapse
- Old concrete with cracks — may not support the concentrated load
Electrical Supply and Access
Hot tubs need a dedicated electrical supply. This isn’t optional — it’s a safety requirement.
The Basics
Most full-sized hot tubs in the UK need a 32A or 40A dedicated supply from your consumer unit, wired via an RCD-protected outdoor switch (IP-rated for weather). This must be installed by a qualified Part P electrician — it’s not a DIY job. The outdoor disconnect switch must be within sight of the tub but at least 2 metres away from it, per UK wiring regulations (BS 7671).
Cable Run Length
The further your tub is from the house, the more the cable run costs. Every additional metre of armoured cable adds £10-20 to the installation. A 30-metre cable run from the consumer unit might cost £500+ just for the electrical work. Factor this in when choosing location — the far corner of the garden looks lovely but the electrician’s bill won’t.
Typical Electrical Costs
- Cable run under 15m: £300-500
- Cable run 15-30m: £500-800
- New consumer unit or supply upgrade: £200-400 on top
- Total for a typical installation: £400-900
Privacy and Screening
Nobody wants to sit in a hot tub feeling exposed. Privacy screens don’t need to be expensive to be effective.
Natural Screening
- Evergreen hedging — laurel, privet, or photinia. Gives year-round privacy but takes 2-3 years to mature. Plant now, use temporary screening while it grows.
- Bamboo — fast-growing, dense, and looks great. Use clumping varieties (Fargesia) not running varieties, or it’ll invade the entire garden.
- Existing walls or fences — the easiest option. Position the tub against a 1.8m fence and you’re mostly covered.
Built Screening
- Hot tub gazebo — about £500-3,000 depending on size and material. Provides privacy, wind shelter, and rain protection in one. The most practical option for the UK climate.
- Privacy screens/panels — slatted timber or composite panels. About £50-150 per panel. Quick to install and position where needed.
- Pergola with climbing plants — combines structure with greenery. Takes a season to fill in but looks spectacular once established.
The Neighbour Consideration
Check sight lines from upstairs windows — both yours and your neighbours’. A fence provides ground-level privacy but means nothing if the house next door looks directly down into your garden from their bedroom. A gazebo roof or overhead screening solves this.
Wind, Shelter and Weather Exposure
The UK has no shortage of wind and rain. An exposed hot tub costs more to run and is less enjoyable to use.
Wind Chill
Wind strips heat from the water surface and from you when you’re sitting in it. A tub in an exposed, windy position will use 20-30% more electricity than one in a sheltered spot. Position it against a wall or fence that blocks the prevailing wind (usually south-westerly in the UK). Even partial shelter makes a noticeable difference to comfort and running costs.
Rain
Rain doesn’t damage the tub (it’s designed to be outside), but sitting in a hot tub during heavy rain gets old fast. A gazebo or overhead cover transforms the experience — warm water, rain drumming on the roof above you, dry from the chest up. This is peak UK hot tub living.
Sun
If you use the tub mainly in the evenings, west-facing catches the sunset. If you use it during the day, south-facing gets the most sun. Direct sunlight on the cover fades it faster, so factor in whether you want the tub in shade during the day when it’s covered.
Access for Delivery and Maintenance
Hot tubs are large, heavy, and awkward to move. Measure your access route before ordering.
Delivery Access
A standard hot tub is roughly 2m x 2m x 0.9m and weighs 250-400kg empty. It needs a clear path at least 1m wider than the tub on the narrowest side. Measure every gate, gap, and turn. Common access failures:
- Side gate too narrow — standard side gates are 900mm, many tubs need 1m+ clearance
- Tight turns — the tub won’t bend around a 90-degree corner in a narrow path
- Steps — delivery teams can manage one or two steps, but a flight of stairs usually means crane delivery (£300-600 extra)
Maintenance Access
Leave at least 600mm access on the side with the equipment panel. You (or your hot tub engineer) need to reach the pumps, heater, and control board. Pushing the tub flush against a wall on the equipment side is a mistake you’ll regret the first time something needs servicing. Our guide to choosing a hot tub base has more on preparing the foundation for access.
Drainage and Water Supply
You’ll drain the tub every 3-4 months for a full water change. Plan for this.
Draining Options
- Gravity drain to a low point — ideal. Position the tub where it can gravity-drain to a garden drain, soakaway, or flower bed (diluted hot tub water is fine for lawns and established plants).
- Submersible pump — if gravity drain isn’t possible. About £30-50 from Screwfix. Pumps to a drain or through a hose.
- Not into the storm drain — treated hot tub water contains chemicals. Your local water company’s guidelines specify where you can discharge it. Generally, draining onto your own garden is fine; draining into the road gutter is not.
Water Supply
You’ll fill the tub with a garden hose. Make sure the hose reaches the tub location. A 2m x 2m tub holds roughly 1,200-1,500 litres and takes 2-3 hours to fill from a standard garden tap. The water supply doesn’t need to be adjacent — a long hose is fine — but having an outdoor tap nearby makes life easier.
Distance from the House
There’s a sweet spot between “too close” and “too far.”
Too Close
Right outside the back door sounds convenient until the pump noise keeps you awake at night. Hot tub pumps run filtration cycles (usually twice daily for 2-4 hours), and while modern pumps are quieter than they used to be, they’re not silent. The UK government’s guidance on noise nuisance applies to persistent mechanical noise, so keep pumps away from bedroom windows — yours and your neighbours’.
Too Far
The 30-metre walk across a wet garden in January, in a towel, at 10pm — it sounds romantic until you’ve done it twice. You won’t use a hot tub that’s inconvenient to reach, especially in winter (which is when hot tubs are at their best). The ideal distance is 5-15 metres from the back door — close enough for the towel dash, far enough that pump noise isn’t intrusive.
The Route
Think about the path between the house and the tub. You’ll be walking it in bare feet, wet, in the dark, in all seasons. A non-slip path with subtle garden lighting makes the experience enjoyable rather than an obstacle course.
Planning Permission
Good news: most domestic hot tubs don’t need planning permission in England and Wales.
Permitted Development
Hot tubs typically fall under permitted development rights as long as:
- The tub doesn’t cover more than 50% of the garden area
- It’s not in front of the house (facing the road)
- It’s not in a conservation area, national park, or AONB (where different rules apply)
- Any structure around it (gazebo, shelter) doesn’t exceed 2.5m at the eaves if within 2m of a boundary
When You Might Need Permission
- Listed buildings — always check with your local authority
- Conservation areas — external structures may need approval
- Very large installations — swim spas or commercial-sized tubs
- Building over a public sewer — needs a build-over agreement from your water company
When in doubt, a quick call to your local planning department is free and takes five minutes. Don’t assume — the cost of retrospective enforcement action is far worse than asking first.
Common Location Mistakes
These are the ones I see repeatedly on hot tub forums, and the ones my friends made despite my warnings.
Not Checking Ground Level
Water always finds the lowest point. If your chosen spot is lower than the surrounding garden, rainwater will pool around the tub base. This doesn’t damage the tub but creates a permanent mud bath around it and accelerates corrosion of the frame. Either raise the base or install drainage around the perimeter.
Forgetting About the Cover
Hot tub covers open on a hinge (manual) or a lifter mechanism. You need clear space behind the tub for the cover to swing open. A typical cover lifter needs 600-800mm of clearance. Position the tub with the opening side facing away from any wall or fence.
Underestimating Running Costs by Location
An exposed tub in a windy garden can cost £60-100/month to run. The same tub in a sheltered position with a quality cover and a gazebo might cost £30-50/month. Position alone can halve your running costs. Our complete buyers guide covers running cost estimates in more detail.
Ignoring Sight Lines
You checked ground-level privacy but forgot that the new houses behind you have third-floor bedrooms with a direct view into your garden. Always check from every angle, including upstairs windows and any elevated positions.
Frequently Asked Questions
What is the best surface to put a hot tub on? A reinforced concrete pad (100mm thick minimum) is the gold standard. Reinforced paving slabs on compacted hardcore are a good alternative. Standard decking, grass, and gravel are not suitable without structural modifications.
How far should a hot tub be from the house? Ideally 5-15 metres from the back door. Close enough for convenient access (especially in winter) but far enough that pump noise doesn’t disturb bedrooms. The electrical disconnect switch must be at least 2 metres from the tub.
Do I need planning permission for a hot tub UK? Most domestic hot tubs fall under permitted development and don’t need planning permission in England and Wales. Exceptions include listed buildings, conservation areas, and installations covering more than 50% of the garden. Check with your local planning authority if in doubt.
Can I put a hot tub on decking? Only if the decking is structurally reinforced to handle the weight — a filled hot tub with people can weigh 1,500-2,500kg. Standard garden decking is not designed for this load. Get a structural assessment before placing any hot tub on decking.
How much does it cost to install a hot tub electrically? Typically £400-900 for a dedicated 32A or 40A supply from your consumer unit. The main variable is cable run length — longer distances from the house mean more armoured cable and higher costs. Must be installed by a qualified Part P electrician.