Swimming pool installation costs in the UK range from around £5,000 for an above-ground pool to over £150,000 for a bespoke inground concrete or stainless-steel pool, with the average inground garden pool coming in at approximately £75,000 fully installed. The variation is driven by pool type (above-ground, fibreglass shell, concrete or liner), size, indoor or outdoor location, and regional labour rates. Ongoing running costs add £1,500–£5,000 per year. If you are comparing pool types rather than costs, see our guides to fibreglass pools and natural swimming pools. This guide covers installed prices for each pool category, the main cost factors, and what to expect for annual running expenses.
- Above-ground pools: £5,000–£10,000 installed. The cheapest way to add a pool to a garden; no groundwork required.
- Inground fibreglass pools: £50,000–£85,000 fully installed (including shell, filtration and groundwork). Faster to install than concrete.
- Inground concrete pools: £60,000–£110,000 for a standard garden pool; bespoke overflow and stainless-steel designs reach £250,000+.
- Running costs: approximately £650/year in chemicals and £80–£250/month in maintenance, plus energy for heating and filtration.
Swimming Pool Installation Costs in the UK by Pool Type
The most important cost variable is whether your pool is above-ground or inground, and if inground, what it is made from. Labour in London and the South East runs approximately 20% higher than the national average.
Above-Ground Pools: £5,000–£10,000
Above-ground pools — rigid steel-wall or resin-frame structures — are the lowest-cost option, typically £5,000–£10,000 installed for a 12ft × 24ft (3.6m × 7.3m) pool. Supply-only DIY kits (24ft × 12ft) start at £6,000–£7,500, with labour adding approximately £3,500 outside London or £4,200 in London. They require no excavation, can be dismantled, and are the practical choice for a budget installation or a rental property.
Inground Liner Pools: £30,000–£51,000
A small inground liner pool — a steel or polymer-panel structure fitted with a vinyl liner — costs £30,000–£40,000 for the supply plus approximately £9,000 in labour (£10,800 London), bringing the total to around £39,000–£51,000. Liner pools are the entry-level inground option, though liners typically need replacement every 10–15 years at a cost of £1,500–£4,000.
Inground Fibreglass Pools: £50,000–£85,000
Fibreglass pools use a factory-moulded shell that is craned into the excavation and connected to the circulation system. A medium fibreglass pool costs £50,000–£70,000 installed; a large fibreglass pool reaches £60,000–£85,000. Advantages over concrete include faster installation (typically 1–2 weeks once groundwork is done), a smooth surface that resists algae, and lower long-term chemical consumption. Size is constrained by what can be transported to site — most fibreglass shells are available up to around 10m × 4.5m.
Inground Concrete Pools: £60,000–£110,000+
Concrete (gunite or shotcrete) pools offer the most design flexibility and are the standard for bespoke, large or indoor installations. A medium concrete pool with mosaic tiles costs £60,000–£90,000; a large concrete pool reaches £75,000–£110,000. At the luxury end, overflow (infinity edge) pools cost £90,000–£250,000+ and stainless-steel pools start at £90,000 and exceed £200,000 for large bespoke designs. Construction typically takes 8–16 weeks.
Indoor Swimming Pools
An indoor pool adds significant structural and building-envelope costs: the average indoor pool costs £152,500 in the UK, reflecting the need for specialist ventilation (to manage humidity and prevent condensation damage to the building fabric), structural adaptation, and heating. Indoor pools are almost always concrete or steel construction. Planning permission is typically required for significant home extensions to house a pool.
| Pool Type | Typical Installed Cost | Key Notes |
|---|---|---|
| Above-ground | £5,000–£10,000 | No excavation; portable; no planning needed |
| Inground liner | £39,000–£51,000 | Liner replacement every 10–15 years |
| Inground fibreglass | £50,000–£85,000 | Fast install; algae-resistant surface |
| Inground concrete | £60,000–£110,000 | Most flexible design; longest build time |
| Bespoke (overflow/SS) | £90,000–£250,000+ | Infinity edge or stainless steel |
| Indoor pool | £100,000–£200,000+ | Requires specialist ventilation and planning |
Swimming Pool Running Costs and Additional Expenses
Beyond installation, the main ongoing costs are energy (heating and filtration), chemicals and maintenance. These vary significantly depending on whether the pool is heated, covered and how efficiently the circulation system runs.
Chemical Treatment
Annual chemical costs — chlorine (or salt-chlorine generation), pH adjusters, algaecide and shock treatment — average approximately £650 per year for a standard garden pool. Saltwater chlorination systems have a higher upfront cost (£1,500–£3,000 for the system) but reduce ongoing chemical expenditure. For a detailed breakdown, see our guides to chlorine shock treatment and pH management.
Heating Costs
Heating a UK outdoor pool to a comfortable 28°C during the summer months costs approximately £2,000–£10,000 to install a heating system; ongoing annual heating costs depend on the technology. Gas heaters are cheaper to buy (£1,500–£3,500) but expensive to run. Solar thermal panels eliminate ongoing fuel costs after installation (typically £3,000–£5,000). Air-source heat pumps (£3,000–£7,000) are the most efficient option for UK conditions, with a COP of 5–6, meaning each unit of electricity produces 5–6 units of heat.
Maintenance Contracts
Professional pool maintenance contracts run £80–£250 per month for regular water testing, chemical dosing, filter cleaning and equipment checks. Most pool owners budget £1,500–£3,000/year for maintenance if using a professional service. DIY maintenance is possible with the right equipment but requires consistent attention to water chemistry.
Additional Installation Costs to Budget For
- Excavation and groundwork: £5,000–£15,000 (soil type, access, volume to remove)
- Electrical installation: £800–£3,000 (dedicated circuit for pump and lighting)
- Pool heating system: £2,000–£10,000
- Structural engineer: £300–£500/day if required for indoor installations
- Landscaping and paving: £2,000–£10,000+
Frequently Asked Questions
How much does a swimming pool cost in the UK?
UK swimming pool costs range from £5,000–£10,000 for an above-ground pool to £60,000–£110,000 for an inground concrete pool. The average fully installed inground garden pool costs approximately £75,000. Indoor pools average £152,500. The main variables are pool type (above-ground, liner, fibreglass or concrete), size, and whether it is indoors or outdoors.
What is the cheapest type of swimming pool to install in the UK?
Above-ground pools are the cheapest, at £5,000–£10,000 installed. They require no excavation or groundwork and can be installed in a day or two. Among inground pools, a small liner pool is the lowest-cost option at around £39,000–£51,000 fully installed. Fibreglass pools (£50,000–£85,000) are faster and often cheaper than comparable concrete pools.
How much does it cost to run a swimming pool in the UK each year?
Annual running costs for a UK outdoor pool are typically £1,500–£5,000/year, comprising chemicals (approximately £650/year), maintenance (£1,000–£3,000/year for a professional contract) and electricity for filtration (£300–£800/year). Heating adds significantly to running costs if the pool is heated through the year; air-source heat pumps are the most cost-efficient option. Indoor pools cost more to run due to continuous ventilation and heating requirements.
Do you need planning permission for a swimming pool in the UK?
Outdoor inground garden pools generally fall under permitted development and do not need planning permission, provided the pool is within the garden of a house, not in a designated area (conservation area, AONB, national park), and does not occupy more than half the garden area. Indoor pools that involve significant extensions or structural changes to a dwelling typically require planning permission. Always check with your local planning authority before starting work.
How long does it take to install a swimming pool in the UK?
Above-ground pools: 1–2 days. Inground fibreglass pools: 1–2 weeks (once groundwork is complete). Inground liner pools: 2–4 weeks. Inground concrete pools: 8–16 weeks, depending on design complexity and finishing. Indoor pools: 3–6 months, including structural work and specialist ventilation installation.
