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Hot tub supply and installation in the UK typically costs £3,000–£12,000+ depending on hot tub size, brand, and site complexity. The hot tub itself: £2,000-£10,000 retail. Installation (concrete or paving base, electrical hookup, water plumbing, delivery): £1,000-£3,500 typically. Premium / built-in hot tubs and swim spas can run £15,000-£40,000+.
The largest variable is electrical hookup. Hot tubs need 32A or 40A dedicated supply on RCD-protected circuit; in most older UK homes, this means a Part P registered electrician installing new cable from the consumer unit. £400-£1,200 for the electrical alone.
Typical UK costs
| Item | Typical price |
|---|---|
| Budget hot tub (4-person) | £2,000–£4,000 |
| Mid-range hot tub (6-person) | £4,000–£8,000 |
| Premium hot tub (Sundance, Hot Spring) | £8,000–£15,000+ |
| Swim spa | £12,000–£25,000+ |
| Concrete base preparation | £300–£1,200 |
| Paved base installation | £500–£1,500 |
| Electrical hookup (32A circuit) | £400–£1,200 |
| Outdoor cover / pavilion | £500–£3,500 |
| Annual servicing | £100–£300 |
| Insurance / cover plan | £100–£300/year |
What's involved
- Site selection — level, accessible to power and water, screened for privacy, near house for convenience.
- Base preparation — concrete pad (£300-£1,200) or paved base (£500-£1,500). Must support 1.5-3 tonnes of water + tub + occupants.
- Electrical hookup — Part P registered electrician installs 32A/40A circuit from consumer unit, typically armoured cable in trench. Notifiable work, certified.
- Water connection / fill — sometimes from outside tap; can fill via hose. No permanent plumbing usually needed.
- Delivery — typically by hot tub specialist with crane or specialist trolley. Garden access matters; some need access via house!
- First fill and chemical balance — supplier usually does first fill and water balance, hands over with brief instruction.
- Cover and surround — insulated cover essential; surround / pavilion optional.
Running costs
- Electricity — £40-£120/month for typical use (depends on tub size, insulation, ambient temperature, frequency of use).
- Water — £20-£50 per fill (typically every 3-4 months).
- Chemicals — chlorine / bromine / pH balance: £15-£40/month.
- Filter cartridges — replace every 6-12 months: £20-£60 each.
- Annual service — £100-£300.
- Insurance / extended warranty — £100-£300/year (recommended for premium tubs over warranty period).
Things people often miss
- Permitted development for hot tubs — most domestic gardens are permitted. Conservation areas, listed buildings, very large or built-in installations may need planning permission.
- Building Regs for built-in hot tubs — if integrated into structure (sunken into deck, conservatory installation), Building Regs apply.
- Foundations matter — hot tub full of water + people can be 2-3 tonnes. Cheap base preparation cracks within years; quality concrete or paving is non-negotiable.
- Insulation matters more than people think — well-insulated tubs (full foam insulation) cost 30-50% less to run than budget tubs (cabinet only insulated). The £500-£1,500 premium pays back in running costs.
- Cover essential — uncovered hot tubs lose £50-£100/month in heat. Quality covers last 5-7 years; replace when worn.
- Children safety — locked covers and pin-locks essential. Drowning risk is real, particularly for unattended young children.
- Septic tank load — for properties on septic tanks, regular hot tub fills can shock the system. Drain to garden / soakaway instead.
Frequently asked questions
How much does it cost to run a hot tub?
£40-£120/month all-in (electricity, chemicals, filter changes). Heavily depends on insulation quality and frequency of use. Premium tubs with full foam insulation: lower end. Budget tubs in winter: upper end.
Do I need planning permission?
Most domestic garden hot tubs are permitted development. Listed buildings, conservation areas, very large / built-in installations may need planning. Check with local planning officer if uncertain.
Can I install a hot tub myself?
The hot tub itself: theoretically yes (it's heavy and awkward but plug-and-play). The electrical hookup must be Part P registered electrician. Base preparation can be DIY for simple paved installs; concrete bases benefit from professional.
How long does installation take?
Base preparation: 1-3 days (concrete cure time). Electrical: 1 day. Delivery and commissioning: half-day. Total project: 1-2 weeks if base is being built; same-day if base already in place.
Should I get a service plan?
For premium tubs, often yes — covers chemical delivery, filter changes, water testing, callouts. £200-£400/year typical. For budget tubs, DIY maintenance is more cost-effective.
How long does a hot tub last?
Quality brands (Sundance, Hot Spring, Beachcomber): 15-25 years with regular maintenance. Mid-range: 10-15 years. Budget: 5-10 years before pump / heater failures cost more than replacement.
Want a local pro to handle this? A hot tub specialist for supply, base, and commissioning; Part P registered electrician for hookup. Worth comparing 2-3 quotes for the same spec — pricing on identical hot tub models can vary £500-£2,000.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
