This is the moment of truth. You've received an initial quote, and the figure quoted seems reasonable – perhaps even lower than you imagined. Be wary: in the world of swimming pools, the price of the pool itself is often just the entry fee. It grabs your attention, it reassures you, and it leaves in the shadows a series of additional costs without which your pool will be neither usable, nor compliant, nor pleasant. Not to mention the expenses you'll pay every year until you sell the house. Here is the complete financial reality, unfiltered.
The price of the basin is just the starting point
A standard pool quote covers the supply and installation of the pool, the basic filtration system, and sometimes the steps and lighting. What it generally doesn't cover – or only partially – is everything that makes the pool truly usable: the ground you'll walk on, the walls that surround it, the vegetation that dresses it. These items often represent 30–60% of the total budget of the project.
Earthworks: the first line of approach
Digging the hole, removing the soil, and preparing the base and surroundings – this is the most unpredictable and cost-overrun-generating part of the project. On standard ground with easy access and ordinary soil, expect £3,000 to £6,000. But real-world conditions can cause this figure to climb very rapidly:
- Rocky soil The hydraulic breaker and the excavator's overtime can add €5,000 to €15,000 depending on the hardness and thickness of the layer.
- Difficult access a walled garden with no access for a standard truck or digger requires specific equipment (mini-digger, lawn protection matting, temporary fence removal) — allow an additional €1,000 to €3,000
- Land evacuation Depending on the volume excavated and the distance to the tip, disposal alone can represent €1,500 to €4,000.
- Backfilling and compaction the surroundings of the basin must be properly backfilled and compacted to avoid differential settlement under the deck – a post often underestimated in fixed-price quotes
The rule of prudence Always allow for a contingency of 20% on the earthworks item. If your site has not undergone a preliminary geotechnical survey (see Part 2), this reserve must be increased to 30 %.
Copings and deck: the aesthetic feature that carries a lot of weight
The coping stones are the slabs that border the pool at water level. The deck is the surface surrounding them, where you walk, place your sun loungers, and where your children run barefoot. These two elements are inseparable from the daily use of a swimming pool — and yet they are rarely included in the initial quote from the pool installer.
The choice of material conditions both the budget and long-term maintenance:
- Exposed aggregate concrete Cost-effective and robust solution, €40-€80/m² laid — slippery when wet if poorly installed
- Porcelain stoneware tiles Aesthetic, durable, €80 to €150/m² installed depending on format and quality. Be mindful that the grout can get dirty.
- Natural stone (slate, travertine, schist): Premium finish, £120 to £300/m² installed — some stones absorb heat and burn feet in the summer
- Composite decking or exotic hardwood: Warm to the touch, child-friendly, €150 to €350/m² installed — check for FSC certification and moisture resistance
- Printed concrete Versatile compromise, £60 to £120/m² fitted
For a standard pool surround around an 8 × 4 m pool (approximately 50 to 80 m² in area), the materials and installation budget ranges from €3,000 to €20,000 depending on the material chosen. This is an area where you shouldn't cut corners: a poorly constructed pool deck can crack, peel, or become dangerous within a few seasons.
The technical room: invisible but indispensable
The pump, the filter, the heating system, the dedicated electrical panel, the treatment products — all of this must be housed in a suitable technical room. If your property already has a nearby garden shed or garage, the cost is limited to the interior fittings (pipework, connections, shelving). Otherwise, budget for:
- Underground or partially underground prefabricated premises: €1,500 to €4,000
- Masonry access opening €3,000 to €8,000 depending on size and finish
- Dedicated electrical connection (consumer unit, wiring, compliance with NF C 15-100 standards): €1,500 to €3,000 depending on distance to the main board
Landscaping: the job we always put off... and end up paying for.
A swimming pool delivered without landscaping looks like a bathroom without tiles: functional but unfinished. Earthworks leave the garden in a state that almost always requires a complete overhaul of the surroundings: levelling, re-seeding or laying turf, planting windbreak hedges, creating shaded areas, and outdoor lighting.
This role is very variable depending on your ambitions and your ability to carry out some of the work yourself. Expect £2,000 - £15,000 For a cohesive layout, or nothing if you're a DIYer with patience. The advice: plan it from the project's design stage, not as an afterthought — certain plantings (hedges, trees) need time to grow and fulfil their protective role.
Summary: the realistic total budget
| Post | Low fork | High fork | Note |
| Pool (shell, kit or concrete) | 10 000 € | 70 000 € | According to technology and size |
| Groundworks and removal | 3 000 € | 20 000 € | Highly variable depending on the soil |
| Pool coping and surround | 3 000 € | 20 000 € | According to material and surface |
| Local technique + electricity | 1 500 € | 10 000 € | According to existing equipment |
| Safety device | 1 500 € | 8 000 € | Mandatory in France |
| Landscaping | 0 € | 15 000 € | According to ambitions and autonomy |
| TOTAL PROJECT | 20 000 € | 140 000 € | Realistic median: €35,000 – €55,000 |
The realistic median for a standard in-ground swimming pool (8 x 4 m, concrete or shell, correct equipment, natural stone surround) is around £40,000 to £55,000 all in. A quote of €18,000 for «a complete swimming pool» is worth reading line by line to identify what is not included.
The cost of use: what you will pay each year
The swimming pool does not stop costing money the day the pool builder leaves. Every year, from opening to closing, it generates regular running costs. These costs are predictable, controllable with the right equipment, but they must be anticipated from the decision phase onwards.
Electricity: the bill that is most surprising
The filter pump is the main electricity consumer for your swimming pool. It runs for an average of 8 to 12 hours a day during the season. Over a full year (with a season of 5 to 6 months), the consumption of a standard installation represents:
- Standard fixed-speed pump (0.75 to 1.5 kW): 800 to 1,500 kWh/year, or £160 to £300 per year at the current average price
- Variable speed pump 300 to 600 kWh/year, or £60 to £120/year — the gap widens even further if you have an associated electric heater
- Heat pump (heating) an additional 800 to 2,500 kWh/year depending on power, usage and region – i.e. £160 to £500 per year Furthermore
- Lighting, robot, automation: 100 to 300 kWh/year extra depending on the equipment
Total annual electricity budget: €200 to €900 depending on the equipment and uses. A well-optimised installation (variable speed pump, timer, thermal night cover) is in the lower half of this range.
Treatment products: less than you'd think with the right automatisms
Chlorine, pH+, pH-, algaecide, clarifier, shock treatment… The list of products needed to maintain a swimming pool can seem daunting. In reality, with well-balanced water and regular dosing, the needs are very predictable:
- Standard chlorine treatment (tablets, granules): €150 to €350/year depending on the size of the pool and visitor numbers
- Salt electrolysis Salt itself is inexpensive (renewals costing €20 to €40/year), but the electrolysis cell needs replacing every 5 to 8 years (€400 to €900). Over time, the average annual cost works out at €80 to €180 per year — with the added bonus of softer skin.
- UV or ozone treatment significantly reduces chlorine requirements (by up to 50%), but involves an initial investment of €500 to €2,000 and additional electricity consumption
- pH correctors, algicides, shock treatments £50 to £150 per year in addition, whatever the main method
Annual treatment product budget: €150 to €400 for a well-managed installation. Overruns mainly occur due to negligence (green water requiring treatment: €50 to €200 for shock treatment and extra products) or very high usage.
Water: the most underestimated essential
A 50 m³ swimming pool loses an average of 10 to 20 litres of its volume each year through evaporation, minor leaks and partial draining — that is, 5,000 to 10,000 litres that need to be replaced. At the average price of drinking water in France (€4 to €6 per m³ depending on the local authority, including the standing charge), this amounts to €20 to €60 per year. It's not the heaviest post, but it's systematically forgotten in estimates.
If you have the possibility to collect rainwater for filling and refilling (an underground tank connected to a gutter), the savings over 10 years can be significant – and the environmental gesture is consistent with a sensible use of water resources.
Insurance and taxes: recurring administrative fees
The presence of a swimming pool affects your home insurance policy in two ways. Firstly, it increases the insured value of your property (which must be declared to your insurer). Secondly, if an accident occurs in your pool involving a third party – a neighbour, guest, or a neighbour's child – your civil liability will be engaged. Check that your policy explicitly covers swimming pool accidents and that the coverage limits are sufficient.
The annual surcharge related to a swimming pool varies depending on insurers and the size of your property: expect £80 to £250 per year additional, on average. This is also added to by the increase in property tax linked to the declaration of the swimming pool as a permanent construction: €150 to €600/year according to the surface area and the municipality (see Part 2).
Winterisation, de-winterisation and occasional maintenance
If you carry out the winterisation and de-winterisation yourself, the cost is limited to specific products (winteriser, antifreeze, buoy inflation): €80-€150 per year. If you entrust these operations to your pool professional, count 300 to 600 €/year for both interventions.
In addition to these recurring costs, there are one-off expenses that are difficult to plan precisely but are unavoidable over time: replacing a filter cartridge, repairing a leak on a fitting, replacing an LED spotlight, recalibrating the automatic regulator. Budget for €100 to €300/year for these common unforeseen events.
Summary: What a swimming pool really costs each year
| Annual post | Basic installation | Optimised installation |
| Electricity (filtration + heating) | 400 – 900 euros | £200 – £400 |
| Treatment products | 250 – 400 € | £150 – £250 |
| Water (renewal) | 30 – 60 € | 20 – 40 € |
| Insurance (premium) | 100 – 250 € | 100 – 250 € |
| Property tax (swimming pool share) | £150 - £600 | £150 - £600 |
| Winterisation / De-winterisation | £300 – £600 | £80 – £150 |
| Routine maintenance and unforeseen events | 150 – 300 € | £100 – £200 |
| TOTAL ANNUAL | 1,380 - 3,110 € | 800 – 1,890 € |
The difference between a basic and an optimised installation lies in a few targeted choices made during construction: a variable-speed pump, an automatic pH/chlorine regulator, a thermal cover, and salt electrolysis. These features represent an initial additional cost of £3,000 to £6,000 and generate annual savings of €600 to €1,200. The return on investment is between 3 and 7 years – and you also benefit from better quality water and less demanding maintenance.
So, a well-equipped and well-managed swimming pool therefore costs £65 to £160 per month at a real cost of use — i.e. the price of a family gym membership, with the advantage of being at home.
Now that the budget is clearly set out, let's move on to a topic that quotes rarely address spontaneously but which engages your legal responsibility: safety obligations around the pool.
