What Does a Swim Spa Cost? UK and US Prices vs Building Your Own (2026)

Last updated: September 2026

If you’re thinking about a swim spa, one of the first questions is probably “what does a swim spa cost?” They’re not cheap, but they do give you a lot: somewhere to swim, exercise and relax all year, in a fraction of the space of a pool.

In this guide I’ll break down what you can expect to pay for a shop-bought swim spa in the UK and the USA, what drives the price, the delivery, installation and running costs people forget, and then my money-saving alternative: building your own. It’s not for everyone, but it’s definitely worth considering.

What is a swim spa?

A swim spa is a cross between a swimming pool and a hot tub. It’s a long, heated tub with powerful jets at one end that create a steady current, so you can swim on the spot, just like in open water. Many also have a hot tub seating area at one end, and “dual-zone” models keep the two sections at different temperatures.

They’re designed for year-round use: swimming, aqua exercise, relaxing and hydrotherapy. For anyone who wants to swim at home but doesn’t have the space (or budget) for a full pool, they’re a great option. There’s more background in Backyard swim spa: everything you need to know.

Swim spa prices at a glance (2026)

Market and tier	Typical price	Source
USA: standard	$7,000–$15,000	Angi (unit only)
USA: midrange	$15,000–$25,000	Angi (unit only)
USA: high-end	$25,000–$50,000+	Angi (unit only)
USA: installed, all-in	$20,000–$40,000 on average ($10,000–$65,000+ overall)	HomeGuide
UK: new, all tiers	£10,000–£55,000	WhatSwimSpa
UK: small, good quality	from around £12,000	H2O Hot Tubs
UK: medium	from around £15,000	H2O Hot Tubs
UK: large or dual-zone	generally over £20,000	H2O Hot Tubs

Sources: Angi and HomeGuide (USA, 2026 data), and WhatSwimSpa and H2O Hot Tubs (UK, 2026). Note that the UK figures come from retailers, and the Angi figures exclude installation, while HomeGuide’s include it. Always compare like with like.

What affects the price?

• Size. Longer and wider swim spas hold more water, need bigger pumps and heaters, and cost more to buy, deliver and run.
• The swim system. Jet-driven currents are the norm. Propeller or hydraulic systems give a smoother, stronger current and cost more.
• Single or dual zone. A separate hot tub section with its own temperature adds equipment and cost.
• Build quality and insulation. Better shells, frames, insulation and covers cost more upfront but save money every month.
• Features. Lighting, audio, app control, fitness kit and water treatment upgrades all add up.
• Brand and warranty. Established brands charge more for their name and back-up. A longer warranty adds to the price but can save you a big repair bill.

Delivery and installation costs

This is where budgets go wrong. The price on the showroom sticker is rarely what you’ll actually pay.

Item (USA)	Typical cost
Crane delivery	$800–$1,500 (Angi)
Installation labour	$300 (simple above-ground) to $7,000 (in-ground) (Angi)
Electrical work	$800–$1,600 (HomeGuide)
Concrete slab	$6–$12 per sq ft (HomeGuide)
Permits	$200–$1,000 (Angi)
Cover	$200–$1,500+ (HomeGuide)

In the UK, retailers are less willing to put a number on it. H2O Hot Tubs says standard delivery may be included, but cranes, HIAB lifts, restricted access and unusual positioning cost extra, and that there’s no honest universal figure for a crane. WhatSwimSpa says installation will be at least a few hundred pounds, and a recessed installation with landscaping will more than likely cost thousands. My advice: get an itemised quote that spells out delivery, craneage, the base, electrics and commissioning.

The base

A full swim spa can weigh many tonnes, so it needs a level, properly designed base. That’s usually a reinforced concrete slab. Follow the manufacturer’s specification to the letter, because a poor base can void the warranty. My guide on building a concrete slab for a hot tub covers the basics.

The electrics

Swim spas draw a lot of power, especially dual-zone models, so you’ll need a dedicated supply with RCD protection (GFCI in the USA), and possibly a subpanel. In the UK it’s notifiable work under Part P, so use a registered electrician. See Hot tub wiring explained.

Permits

Many US areas want a permit, and a barrier or locking safety cover, for a swim spa. In England, a freestanding swim spa in a garden is usually treated like a hot tub and doesn’t normally need planning permission, but listed buildings, conservation areas, and sunken installs with raised decking or a building over them may be different. Check first. My guide Do I need a permit for my hot tub? is a good place to start.

Running costs

Heating the water is by far the biggest ongoing cost. After that come chemicals, filters, the odd repair and eventually a new cover.

• USA: Angi puts electricity at roughly $20–$50 a month. HomeGuide’s broader maintenance figure is $50 to $300+ a month, depending on use and what you include.
• UK: H2O Hot Tubs says plainly that there’s no reliable single monthly figure. It depends on the volume, the temperature you run it at, the weather, the insulation, how often you use it and your tariff.

To give you a feel for the numbers, here’s the physics. Heating 1,000 litres of water by 1°C takes about 1.16kWh. So a swim spa holding 10,000 litres (about 2,640 US gallons) needs roughly 11.6kWh for every degree you raise it. At the Ofgem price cap rate of 26.32p per kWh (October to December 2026, Direct Debit), that works out as:

10,000 litre swim spa	Electric heater	Heat pump (assuming a COP of 4)
Raise it by 1°C	about £3.06	about 77p
First heat-up from 10°C to 30°C	about £61	about £15

These are my own calculations and ignore heat losses, so treat them as a guide. Real running costs depend on how much heat you lose each day, which is why insulation and a good cover matter so much. The US Department of Energy says covering a pool can cut heating costs by 50–70%, because evaporation is by far the biggest source of heat loss. It’s also why I’m such a fan of air source heat pumps. See the ultimate guide to air source heat pumps for hot tubs and how to choose the right air source heat pump.

Other ongoing costs

• Water treatment: chlorine or bromine, pH and alkalinity adjusters, and test strips or a test kit.
• Filters: cartridges need regular cleaning and replacing. See how to clean a filter cartridge.
• Water: filling it and occasional water changes. HomeGuide puts hose filling at $4–$10 per 1,000 gallons in the USA.
• Repairs and wear: pumps, jets, heaters and control boards all wear eventually. Keep up with small jobs before they become big ones.
• The cover: covers wear out and lose their insulation over time. See my guide to hot tub covers.

Swim spa or swimming pool?

A swim spa is usually far cheaper than a traditional pool. Checkatrade’s 2026 UK figures put an outdoor in-ground pool at £60,000–£150,000, and compact or endless pools at £18,000–£45,000. A swim spa also takes up much less space, can be used all year thanks to its insulation and cover, and doubles as a hot tub if it has a seating zone. The trade-off is that you swim on the spot, and the bigger family pool experience isn’t there.

The cheaper option: build your own swim spa

Have you ever considered building your own? It might sound surprising, but a DIY swim spa could save you a significant amount of money, possibly around half the cost of a shop-bought model. If you’re handy and enjoy a challenge, it’s a rewarding project that’s not as difficult as you might think. With a bit of planning and effort, I reckon you can build your own DIY swim spa for under $20,000.

A swim spa is really just a small cocktail pool or spool with a swim jet (counter current system) added. The process is the same as building a DIY in-ground hot tub, just longer.

Step 1: Planning and design

Decide on the size, depth and shape, what materials you’ll use, and plan the plumbing and electrics: pumps, heater, filter and the swim jet. This is where a good set of plans saves you the most money, and it’s where I can help. My swim jet considerations guide covers how long and deep the swim area needs to be.

Step 2: The structure

Start with a sturdy base, normally a reinforced concrete slab. For the walls, I recommend ICF (insulated concrete form) blocks. They’re quick to build, and the insulation is built in, which keeps running costs down. See what to look for in ICF blocks and my in-ground build guide for the groundwork.

Step 3: Plumbing, swim jet and electrics

Install the pump, heater (ideally an air source heat pump) and filter, then the swim jet that creates the current. I’ve written a full guide on how to install a counter current swim jet.

Step 4: Finishing

Waterproof it, flood test it, then finish it. I recommend tiles. A painted finish is a lot cheaper, but it just doesn’t look quite as good.

I’m simplifying here, of course. There’s a full walk-through in How to build a DIY exercise pool and Can I build a DIY swim spa?, and you can see a real one in Darren’s DIY hot tub and swim spa.

DIY vs bought: how they compare

	Shop-bought swim spa	DIY swim spa
Typical cost	$20,000–$40,000 installed (USA), £10,000–£55,000+ for the unit (UK)	Under $20,000 is realistic (my estimate), depending on size and finish
Time	Days, once the base and electrics are ready	Weeks to months of your own time
Size and shape	Fixed models	Whatever fits your garden
Access	Needs a clear route or a crane	Built in place, so access is rarely a problem
Finish	Acrylic shell, with a timber or composite cabinet	Tiled, set flush in the ground or raised
Warranty	Manufacturer’s warranty	Individual equipment warranties. The build is on you.
Moving house	Can be sold or moved (with a crane)	Stays with the house

Money-saving tips (whichever route you take)

• Buy on insulation, not gadgets. A well-insulated spa with a good cover costs less every single month.
• Heat with an air source heat pump rather than a direct electric heater.
• Get itemised quotes that include delivery, crane, base, electrics and commissioning.
• Check access before you buy. A crane you didn’t plan for is an expensive surprise.
• Keep on top of maintenance. Clean filters and balanced water protect the pumps and heater.

Planning your own swim spa?

My swim spa plans come in 20 sizes, from 14ft to 20ft long and 8ft to 10ft wide, with a swim area plus a hot tub seating section. You get the CAD drawings, plumbing diagrams, parts list, installation guide and video course, plus structural/architectural drawings you can use for permit submissions (some areas still want a local engineer’s sign-off).

For the current itself, I sell counter current swim jets in four versions:

• Swim jet: faceplate, body and tubes only ($997)
• Swim jet with no pump ($1,597)
• Swim jet with pump ($1,997)
• Swim jet with dual pump ($2,699)

Got an odd-shaped garden or a design of your own? Draw it in the free Tub & Pool Designer Pro software and I can turn it into architectural CAD and a 3D plumbing design.

FAQs

How much does a swim spa cost in the UK?

New swim spas range from about £10,000 to £55,000. Good-quality small models start from around £12,000, and large or dual-zone models are generally over £20,000, before delivery, base and electrics.

How much does a swim spa cost in the USA?

Angi puts the average at about $22,500 before installation. HomeGuide says $20,000–$40,000 is typical including delivery and installation.

How much does a swim spa cost to run?

Angi estimates $20–$50 a month in electricity in the USA. In the UK it depends on your tariff, insulation, temperature and use. A heat pump and a good cover make the biggest difference.

Is a swim spa cheaper than a pool?

Usually, yes, by a long way. Checkatrade puts a UK outdoor in-ground pool at £60,000–£150,000, and a swim spa is also cheaper to heat because it holds far less water.

Can I build my own swim spa?

Yes. It’s essentially a small pool with a swim jet, built the same way as an in-ground hot tub. With good plans, I reckon under $20,000 is achievable.

How long does a swim spa last?

HomeGuide puts the average lifespan at 8–15 years, depending on quality and how well it’s looked after.

Weighing up a swim spa? Ask me anything in the comments below. I read them all.

Cheers,
Andi

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Hi, Andi here. I own Buildahottub.com and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Fast forward to 2025, I've helped over 1400+ DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi